US20040096959A1 - Analyte measurement - Google Patents

Analyte measurement Download PDF

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Publication number
US20040096959A1
US20040096959A1 US10/432,827 US43282703A US2004096959A1 US 20040096959 A1 US20040096959 A1 US 20040096959A1 US 43282703 A US43282703 A US 43282703A US 2004096959 A1 US2004096959 A1 US 2004096959A1
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Prior art keywords
fluid
channel
analyte
skin
measuring
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US10/432,827
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Matthias Stiene
Tanja Richter
John Allen
Jerome McAleer
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Cilag GmbH International
LifeScan Scotland Ltd
Lifescan IP Holdings LLC
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Individual
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Publication of US20040096959A1 publication Critical patent/US20040096959A1/en
Assigned to LIFESCAN IP HOLDINGS, LLC reassignment LIFESCAN IP HOLDINGS, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CILAG GMBH INTERNATIONAL
Assigned to CILAG GMBH INTERNATIONAL reassignment CILAG GMBH INTERNATIONAL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIFESCAN SCOTLAND LTD.
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14507Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue specially adapted for measuring characteristics of body fluids other than blood
    • A61B5/1451Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue specially adapted for measuring characteristics of body fluids other than blood for interstitial fluid
    • A61B5/14514Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue specially adapted for measuring characteristics of body fluids other than blood for interstitial fluid using means for aiding extraction of interstitial fluid, e.g. microneedles or suction
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/0045Devices for taking samples of body liquids
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1468Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means
    • A61B5/1473Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means invasive, e.g. introduced into the body by a catheter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150015Source of blood
    • A61B5/150022Source of blood for capillary blood or interstitial fluid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150206Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150213Venting means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150358Strips for collecting blood, e.g. absorbent
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150374Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381Design of piercing elements
    • A61B5/150412Pointed piercing elements, e.g. needles, lancets for piercing the skin
    • A61B5/150419Pointed piercing elements, e.g. needles, lancets for piercing the skin comprising means for capillary action
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150374Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381Design of piercing elements
    • A61B5/150442Blade-like piercing elements, e.g. blades, cutters, knives, for cutting the skin
    • A61B5/15045Blade-like piercing elements, e.g. blades, cutters, knives, for cutting the skin comprising means for capillary action
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150755Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/151Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15142Devices intended for single use, i.e. disposable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/0045Devices for taking samples of body liquids
    • A61B2010/008Interstitial fluid

Definitions

  • This invention relates to apparatus for and methods of measuring certain properties of a fluid particularly although not exclusively, bodily fluids and the concentrations of certain analytes therein. At least some aspects of the invention relate particularly to the measurement of glucose levels in blood and other body fluids such as cutaneous (interstitial) and sub-cutaneous fluid.
  • test simplification allows the assay to be performed by relatively untrained personnel in a “non-laboratory” setting.
  • cardiac marker tests configured in a lateral flow immunoassay format with labelled antibody allow for early assessment of potential myocardial infarct.
  • the invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member, analyte sensing means provided thereon for measuring said concentration and a microchannel in fluid communication with said analyte sensing means for conveying said fluid to said sensing means.
  • a microchannel is used to convey the sample fluid to the sensing means.
  • microchannel refers to a channel, of any suitable cross-section, whose lateral dimension is between approximately 10-500 ⁇ m.
  • microchannels are beneficial for a number of reasons in the context of an analyte sensing device.
  • a small sample volume is beneficial since it means that it is easier to provide a sufficient volume for a valid test.
  • the volume of fluid required to carry out an assay is correspondingly small, in addition the microchannel allows to handle flow rates between 10 and 500 nL/min with a high resolution of the measurement over time, due to the low channel volume.
  • the analyte sensing means can be arranged in any suitable configuration depending on the type of sensing means used (electrochemical, optochemical etc.).
  • the analyte sensing means comprises one or more reagents to react with said analyte and thereby give a measurable output.
  • a reagent may be located anywhere, but preferably the reagent or at least one of the reagents is provided on a wall of the microchannel. This arrangement is beneficial since it means that no additional volume is required in order for the sample liquid to be brought fully into contact with the reagent—i.e. the contact area is optimised.
  • the invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member and a microchannel provided on said support member for conveying said fluid across the support member, wherein one or more reagents for reacting with said analyte is coated on a wall of the microchannel.
  • such a device further comprises means for sensing the analyte—for example an electrochemical or a photometric detector.
  • the devices set out hereinabove may be used for measuring any suitable analyte in any suitable fluid.
  • the invention finds particularly beneficial application in the measurement of analytes in human or animal bodily fluids.
  • a suitable sample of bodily fluid may be applied to the device.
  • the device is integrated with means for extracting the fluid.
  • this comprises means for penetrating the skin—in the case where the sample fluid is blood or interstitial fluid.
  • a skin penetration member such as hollow needle, solid lance or the like.
  • the device can be used both to collect the sample fluid and to measure the concentration of the target analyte—or at least give an output from which the concentration can be measured.
  • the present invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member, means provided on the support member for sensing said analyte, wherein said support member further comprises fluid extraction means arranged to direct fluid to said analyte sensing means via a conduit on the support member.
  • a fluid extraction means preferably a skin penetration means, most preferably a needle, lance or the like, is provided on a support member of a device for measuring analyte concentration.
  • skin penetration means e.g. needle
  • support member e.g. test strip
  • the preferred embodiments require a user merely to puncture their skin with a needle or the like and then blood or interstitial fluid may be conducted automatically onto or into the test member.
  • Devices for extracting interstitial fluid are shown in the afore-mentioned Integ patents and International patent application PCT/US01/09673 (International Publication WO 01/72220 published 4 Oct. 2001).
  • the combined needle/test member would normally be used in conjunction with a separate, non-disposable, measuring device for measuring the analyte concentration e.g. by means of the output of an analyte-reagent reaction, where appropriate.
  • the dimensions of the needle, lance or the like may be suited to the particular application.
  • any mechanism for extracting interstitial fluid may be used with the present invention. While the present invention will be described with reference to a shallow penetration needle, the invention is application to any technique for obtaining a body fluid.
  • a standard hypodermic needle several centimetres in length may be employed. Whilst the device may be used to sample interstitial fluid or blood from the cutaneous and/or the subcutaneous layers, in preferred embodiments however, the penetration member is of such a length that it penetrates substantially the cutaneous layer of skin.
  • substantially the cutaneous layer it means that whilst it is the intention to sample fluid from the cutaneous layer, it cannot be ruled out that some sampling from the sub-cutaneous may occur.
  • the cutaneous layer has a high density of blood capillaries which helps to ensure that the levels of analytes in interstitial fluid reliably reflect those in the blood.
  • the actual length of the penetration means will depend on the angle at which it is intended to be inserted.
  • the length may by of the order of several millimetres e.g. up to approximately 7 to 10 millimetres.
  • substantially perpendicular insertion is intended and the length is less than 2 mm, preferably less than 1.5 mm.
  • a length of approximately 1.4 mm is appropriate.
  • a length as short as 0.5 mm may be preferred
  • test member may have just one skin penetration member, or alternatively a plurality may be provided.
  • the penetration means may comprise a sufficiently short standard needle, possibly shortened if necessary. More preferably the penetration means comprises a microneedle.
  • a microneedle is hereby defined as a needle with a length sufficient to penetrate the cutaneous layer of human skin without substantially penetrating the subcutaneous layer. Such a needle typically has length less than 2 mm, preferably between 0.4 and 1.6 mm.
  • the outer diameter is preferably less than 0.5 mm, most preferably between 0.1 and 0.3 mm.
  • the penetration means need not be integrated with the support member, but preferably is.
  • the comments above regarding this arrangement apply, with the additional benefit noted here that preferred embodiments of this arrangement can provide a compact disposable device which gives rise to substantially no pain, in use and obviates the need for a user to come into contact with or even see the bodily fluid concerned.
  • Preferred embodiments of the invention use a reagent-based measurement.
  • Many different reagent-based analyte measurements are available to those skilled in the art, allowing the principles of the invention to find wide application.
  • an optochemical i.e. either fluorescent or luminescent—or an electrochemical technique could be used.
  • One preferred embodiment comprises analyte sensing means comprising a mediated amperometric enzyme electrode.
  • a ferrocene-mediated electron transfer from a glucose-oxidase catalysed reaction is a suitable means for detecting the level of glucose in a body fluid.
  • Other enzymes such as lactate oxidase or lactate dehydrogenase and cholesterol oxidase dehydrogenase may be used to measure lactate and cholesterol levels respectively.
  • use of the above electron-transfer mediator is a non-limiting example and that other electron transfer mediators well known in the art could be used, for example, hexa-cyanoferrate (ferricyanide), oxygen or components of the respiratory chain (i.e. cytochromes).
  • the embodiment will comprise an analyte sensing means which operates in conjunction with a test meter to give the measurement.
  • the member may comprise the appropriate reagent or dye for performing a calorimetric test in association with light sensitive means in the test meter. It will be seen that such arrangements are consistent with the test device being disposable since the costly elements of the sensing mechanism, such as the light sensitive means, electronic circuity etc., can be placed in a non-disposable test meter.
  • a plurality of conduits direct fluid to be measured to respective analyte sensing means.
  • the sensing means may be different so as to measure or test for different analytes in the fluid. Preferably however they are the same or at least are for measuring the same analyte.
  • the invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member and a plurality of analyte sensing means provided thereon for measuring said concentration, wherein said device further comprises a plurality of conduits such that each of said sensing means has a conduit associated therewith, said conduits serving in use to direct said fluid to respective sensing means.
  • the device whether it comprises a single or a plurality of conduit/analyte sensors, may be used to continuously measure the concentration of the analyte over a period of time. Periodic measurements may be taken i.e. the fluid is “sampled” at various periods over time, for example every 30 minutes.
  • Fluid may continuously flow through the device or may be temporarily stopped by, for example, hydrophobic gates.
  • the sensors may be of the single measurement type, after which the device is discarded or fluid is diverted to another conduit to perform another measurement.
  • the total time taken to complete a measurement cycle or the time taken between measurements could vary and would depend upon the degree of monitoring or the analyte of interest.
  • the plurality of conduits would allow for switching from sensor to another after a particular period of time, by diverting fluid flow from one conduit to another. Switching enables measurements to be performed without interruption to the fluid extraction or without having to recalibrate the sensors, which are known to drift after a period of time due to factors such as electrode fouling etc.
  • analyte monitoring may be made on a truly continuous basis, without the user having to recalibrate or interact with the system.
  • An advantage of performing a single measurement either in the case of a device with a single or plurality of microchannels is that drifting of the signal over time is no longer an issue that has to be considered and consequently simpler reagent chemistries may be employed in the analyte sensors. For example in the case of an electrochemical detection system, results may be obtained in as little as five seconds or less. Furthermore, such devices would not require storage reservoirs for collection of the waste fluid, since the waste fluid would be stored in the microchannel conduits themselves.
  • the sensing means may be electrochemical or non-electrochemical in nature—e.g. of the fluorescent or chemi-luminescent calorimetric sort.
  • the sensing means may comprises an enzyme-coated electrode in the case of electrochemical measurement, or in the case of fluorescent colorimetric sensing the sensing means would comprise a suitable reagent dye.
  • the term ‘sensing means’ does not necessarily refer to a complete assembly for giving a final reading, but rather to a means on the support member which yields an output which may be read to give a measure of the analyte concentration, e.g. by a separate test meter.
  • Such devices according to embodiments of the invention as set out above could be arranged to be used in a mode similar to conventional test strips i.e. where a single fluid sample is placed on the device and is measured.
  • devices of the sort set out above may be arranged to measure the concentration of any suitable analyte.
  • the analyte's concentration may simply be an indirect indication of the property of the sample fluid which it is desired to monitor.
  • a detection reagent e.g. an enzyme substrate or an antigen
  • the added detection reagent or the product of the enzyme-catalysed reaction comprises the analyte.
  • Devices in accordance with the invention can therefore be arranged to measure such analytes—i.e. it will be seen that such devices may be used to measure the activity of enzymes in a body fluid sample, or test whether antibodies to a particular antigen are present in the body fluid.
  • the device is arranged to measure an analyte concentration directly—i.e. it is the concentration itself which is being monitored.
  • concentration itself which is being monitored.
  • An example of such a measurement would be glucose in blood, the concentration of which is an important parameter for those suffering from diabetes.
  • the measuring device is suitable for measuring the concentration of an analyte, e.g. glucose, in blood or interstitial fluid.
  • the device is preferably suitable for attachment to the skin of the subject who is to be measured.
  • the subject may be an animal but,is preferably human.
  • measurements of the concentration of the substance in the subject's blood or interstitial fluid can be carried out repeatedly over a period of time.
  • the devices comprise a penetration member with a sufficiently length substantially to penetrate the cutaneous layer of skin, most preferably integrally formed with the support member. It is further preferred that such devices comprises at least one microchannel for conveying the interstitial fluid to one or more of the sensing means.
  • the present invention provides a device for measuring the concentration of a given analyte in a bodily fluid comprising means for attaching the device to the skin of a subject and a plurality of sensing means for making a plurality of measurements of said concentration over a period of time.
  • this aspect of the invention provides a device which can perform a plurality of measurements in situ, that is without user intervention being required. This has clear benefits in removing some constraints on the number, frequency and regularity with which measurements can be performed.
  • Each sensing element in the device is designed to be used for a certain predetermined time during which the signal will not significantly drift over time. In this sense “significantly” represents the amount of drift permitted such the measurement result would not be affected by an clinically unacceptable amount.
  • fluid is then switched to a new sensor and the process repeated.
  • the device is provided with flow control means for influencing the flow of fluid to the sensing means. Any suitable flow control method may be employed with corresponding means to affect such a control method. For example Piezo-electric pumping, electrokinetic or mechanical methods such as ‘unblocking’ the flow along a selected conduit.—e.g. by allowing a gas bubble to escape or by opening a valve.
  • the flow control means comprises a hydrophobic gate situated within the conduit/microchannel.
  • a hydrophobic gate as herein disclosed refers to a hydrophobic surface region within a hydrophilic channel such that the flow of fluid is interrupted. By changing the hydrophobic nature of the gate, i.e. by making the hydrophobic region more hydrophilic, fluid may then be allowed to flow along the channel. Hydrophobic gates may be used to control the flow of fluid within a single microchannel or may be used to switch or redirect flow from one microchannel to another.
  • the hydrophobic nature of the gate may be maintained as it is and a increased pumping force (e.g. provided by a mechanical or electro-osmotic pump) may be applied in order for the fluid to breach the hydrophobic gate.
  • a pumping force e.g. provided by a mechanical or electro-osmotic pump
  • the device is arranged to direct fluid sequentially to each of the sensing means.
  • the timing of the direction of the fluid to the sensing means could be pre-configured for example by software within the meter, such that the fluid is switched after a predetermined period of time.
  • the device comprises, or is adapted to interface with, control means to control said direction of the fluid to the sensing means. Such control is preferably automatic.
  • control means may be such as to allow a user to specify when a measurement is to be made. This is beneficial as it allows measurement on demand which is useful for example in the case of blood glucose monitoring, as it allows the user to determine the effect on blood glucose of eating a particular snack or to determine how much insulin it is necessary to inject prior to eating or the user may simply want to carry out a check for reassurance. This enables the device to make periodic measurements of fluid from the body of the subject using fresh fluid for each measurement, thereby facilitating the desired object of monitoring the concentration of the substance in question over a period of time.
  • each microchannel or other conduit is associated with a respective flow control means, each may be individually addressable by a suitable control means. This gives significant flexibility in how such a device may be used.
  • the device comprises a common fluid collection region in fluid communication with the bodily fluid to be measured—e.g. via a needle—each sensing means preferably being in selective fluid communication with said common collection region.
  • each sensing means preferably being in selective fluid communication with said common collection region.
  • any suitable conduit may be provided for conveying the fluid to be measured to the sensing means, but preferred arrangements comprise microchannels as defined herein.
  • the provision of microchannels allows many test elements to be positioned in close proximity thereby enabling even devices comprising a large number of sensing means to be made relatively small. This is beneficial in applications where the size and weight of the device is an important consideration, such as when it is attached to the user's body.
  • a very low sample volume means that rather than conduct the usual reaction rate measurement as in known electrochemical devices e.g. for detecting blood analytes such as glucose, where electron transfer is measured as a function of time to determine the rate of transfer, an end-point test can be carried out in which the total amount of analyte in the sample volume is measured, thereby consuming substantially all of the analyte.
  • the present invention provides a method of measuring the amount of an analyte in a sample of liquid comprising providing an electrochemical measuring device having a sensor electrode within a microchannel, introducing said sample liquid into said microchannel, and measuring an aggregate current passed by said electrode to give an indication of said amount of analyte in the sample.
  • This aspect of the invention also extends to an electrochemical device for measuring the amount of an analyte in a sample of liquid comprising a sensor electrode dispos d within a microchannel and means for measuring an aggregate current passed by said electrode in use to give an indication of said amount of analyte in the sample.
  • the invention also extends to an equivalent arrangement using a non-electrochemical sensing means—e.g. a calorimetric one.
  • a non-electrochemical sensing means e.g. a calorimetric one.
  • any suitable transfer means for transferring the fluid from the user's body to the device may be employed.
  • methods such as suction, ultra-sound or iontophoresis may be used.
  • the transfer means comprises a needle.
  • the needle is a microneedle as defined hereinabove.
  • the needle is preferably shaped to aid skin penetration.
  • the tip region of the needle is preferably substantially conical.
  • the tip region has a reduced cross-section—preferably less than 0.2 mm in width, most preferably less than 0.05 mm in width.
  • the needle is preferably arranged to minimise the risk of blockage upon insertion into skin.
  • the aperture of the needle may be provided on a side surface of the needle, rather than at the tip as is conventional.
  • the aperture of the needle is recessed, thereby avoiding contact with the skin upon penetration and thus potential blocking and/or damage
  • the needle preferably has a bore such that the sample fluid is drawn up by capillary action.
  • Suitable needle bore sizes range preferably from 21-30 most preferably 25. Any suitable inert and biocompatible material for the needle may be employed.
  • inert materials include but are not limited to stainless steel, gold, platinum and metal-coated plastics
  • microneedles is employed as defined hereinabove.
  • the methods above may be supplemented by applying pressure to the user's skin around the site at which it is penetrated.
  • pressure could be applied purely manually, but preferably the device comprises means—e.g. suitably configured resilient means—to apply the pressure.
  • the device may have skin pressurising means as explained in more detail below and as shown in the figures. Examples of skin pressurising means are set out in copending application US09/877,514 filed Jun. 8, 2001.
  • the devices of the preferred embodiments comprise display means to display the concentration of the analyte being measured such as blood glucose.
  • display means may be coupled directly to the measuring device, but preferably it is separate from the device and receives data therefrom by telemetry.
  • This approach has the advantage that the measuring device can be very light and thus comfortable to wear.
  • the measuring device may be worn under clothing but monitored on a display means kept, say, in a pocket or for example in the form of a watch worn on the arm of the user, without the user having to disturb their clothing in order to view it.
  • the device comprises or is coupled to means for administering a substance to a user on the device on the basis of the measured concentration.
  • a substance to a user on the device on the basis of the measured concentration.
  • the insulin pump could be a separate device or alternatively could be integrated within the analyte sensing device per se. Controlling means present for example within the meter could control the amount of insulin administered by the insulin pump in response to the level of glucose measured by the device.
  • preferred embodiments of this inventive feature can allow a diabetic, to maintain control of his/her glucose levels with a minimum of intervention i.e. only to replace consumable items such as a sensor/insulin patch.
  • the present invention provides an apparatus for administering a substance to a user comprising a measuring device for measuring the concentration of an analyte in a bodily fluid from said user, said measuring device comprising a plurality of analyte sensing means and at least one conduit, preferably a microchannel, for conveying said bodily fluid to at least one of the sensing means; the apparatus further comprising means to administer said substance to said user on the basis of said measurement of concentration.
  • the measuring device preferably comprises a means for attachment to the skin of a user, for example in the form of a self-adhesive patch. This can provide a secure but comfortable arrangement for use over prolonged periods of time, and can be relatively unobtrusive.
  • the means for administering the substance may be entirely separate from the measuring device or integrated therewith.
  • an integrated administering means comprises a reservoir on or in the measuring device for dispensing the substance.
  • the substance, such as insulin is contained within a reservoir on an adhesive patch.
  • the actual means for getting the substance from such a reservoir could comprises anything suitable such as a pressurised supply in conjunction with a flow control means such as a valve.
  • a pump is used.
  • a single pump may be used both to administer the substance, such as insulin, to a user's body and also to draw out blood or preferably interstitial fluid, to a sensing means for making an analyte concentration measurement e.g. of glucose.
  • a suitable device may comprise an adhesive patch comprising a microneedle (as defined herein) coupled to or in fluid communication with an array of microchannels and a separate needle for injecting insulin.
  • a single pump e.g. a silicon micro-pump, may be used to inject insulin from a reservoir on the patch and to draw interstitial fluid over a glucose sensing means to a waste reservoir.
  • control and/or data processing means these will generally comprise electronic means such as an integrated circuit or the like.
  • a power supply is then also required.
  • control/processing means are portable. It or they may be provided in an integral package with the device e.g. the adhesive patch. Alternatively the control/processing means and/or power source may be provided separately and communicate with measuring device via a wire or wireless telemetry link as mentioned above.
  • the power source may be a battery or may be a ‘renewable’ source such as a solar cell or a dynamo energised by movement of the user. Of course a combination of these could be employed.
  • Measuring devices in accordance with the present invention may be fabricated using any suitable technique.
  • the microchannels may be made using any suitable micro-fabrication technique such as but not limited to embossing, plasma etching or injection moulding
  • electrodes are provided on opposing sides of a fluid channel by forming a first channel which is filled with a conductive material, and forming a second channel for conveying the test fluid, the second channel cutting across the first thereby thereby forming two conductive portions within respective opposite sides of the second channel.
  • the conductive portions formed in accordance with the invention could be utilised for an electrochemical sensor arrangement.
  • Micromachining techniques for making the abovementioned intersecting channels are preferred since they can be used to fabricate microchannels which can be formed close to one another, permitting dense arrays thereof.
  • the driving electrodes are preferably positioned in close proximity to one another. This allows high electric fields to be achieved without applying unnecessarily high voltages.
  • driving electrodes are provided substantially on one side of a channel. In one embodiment the driving electrodes extend around the wall of the channel.
  • one or more electrodes may be formed on a second substrate which is then laminated to the main support member of the device.
  • Methods used to deposit the electrodes onto the second substrate may be chosen preferably from a printing method, more preferably a screen-printing method.
  • chemical or physical vapour deposition techniques could be employed.
  • the electrodes according to all embodiments of the invention may be formed of any suitable inert material such as carbon, gold, platinum, etc.
  • carbon electrodes optionally coated with reagents are provided on the second substrate by screen-printing, which is then laminated onto the support member thus closing the channel or channels and two gold electrodes are provided adjacent one another on a substrate laminated onto the support member for an electro-osmotic pump.
  • a second substrate is provided, preferably it is arranged to close the channel provided on the support member. This allows a very straightforward fabrication method in which electrodes are formed within a closed channel.
  • Lamination of one substrate to another will normally be carried out such that both laminates are perfectly aligned and that no further trimming or cutting is necessary.
  • the device could be fabricated for example by firstly a lamination step followed by a cutting step whereby the second substrate may be trimmed to the shape of the support member.
  • Lamination may be carried out by various methods such as ultrasonic or thermal welding or bonding, or by the use of an adhesive.
  • the support member is formed with an integral needle at one end and the second substrate is then laminated onto the support forming a channel and leaving the penetration member exposed.
  • the integrated skin penetration member is provided is open on one side. The penetration member is arranged so that upon insertion into skin, the skin itself effectively forms a wall of the member to that it can act like a hollow needle. Most preferably this is achieved by forming the penetration member with walls tapering away from the open side—e.g. a V shape.
  • the invention provides an apparatus for obtaining and measuring fluid , comprising a skin penetration member having at least one longitudinal side open, the other sides being arranged so as effectively to cause the penetrated skin to act as the remaining longitudinal side of the member when the penetration member is inserted into the skin.
  • the present invention provides a method of fabricating a device for measuring the concentration of an analyte in a fluid comprising providing a support member, forming an open channel on a surface of the support member and laminating a second layer onto said support member so as to close said channel.
  • the invention also extends to a device fabricated using such a method.
  • a light sensing means will, in general, be required.
  • a light source may also be required, but is not always the case, for example in the case of chemiluminescent measurement.
  • Any such light sensing means and/or the light source may be provided integrally with the non-disposable measuring device e.g. a test-meter. According to one embodiment it or they are provided separately of the part of the device which is brought into contact with the sample fluid—e.g. a skin patch. This means that the device itself can be made disposable while the relatively more expensive light sensing means and associated electronics for example could be provided in a separate test meter.
  • the test device comprises means for optimising the light transfer from the sensing means to the optically sensitive means.
  • such means comprises a lens, e.g. integrally moulded as part of the support member for the test device.
  • the device may be arranged such that the light sensitive means views the sensing means along the conduit, e.g. microchannel, along which the sample fluid passes.
  • the conduit preferably a microchannel, acts as a light pipe.
  • the path length and therefore the optical density may be increased for a minimal sample volume. , thereby making its measurement easier and more accurate.
  • the material from which the conduit is formed is preferably chosen so to maximise light throughput at the frequencies of interest.
  • the arrangement described above is beneficial in its own right in enhancing the signal that may be measured from a minimal sample volume and thus when viewed from a yet further aspect the present invention provides an apparatus for measuring the light from an assay comprising an elongate conduit portion along which a sample fluid is drawn in use and a light sensitive means arranged to be sensitive to light coming substantially from the longitudinal axis of said conduit portion.
  • a disposable skin patch is provided with a moulded plastics lens over the analyte sensing means.
  • a corresponding test meter is designed to be placed over the patch and comprises a light sensitive element which sits over the lens when the meter is placed over the patch.
  • FIG. 1 shows a first embodiment of the invention, in the form of a skin patch, in cross section;
  • FIG. 2 a shows an alternative microchannel arrangement
  • FIG. 2 b shows a multiple channel/sensor arrangement
  • FIG. 3 depicts a cross section view of the skin patch of FIGS. 1 , and 2 attached to the skin of the user with a controller unit attached to the skin patch;
  • FIG. 4 depicts a display unit
  • FIG. 5 depicts another embodiment of the invention, showing schematically a skin patch integrated with a needle, which also acts as an electrode, in cross section;
  • FIG. 6 a depicts a microchannel and optochemical sensor in plan view
  • FIG. 6 b depicts a microchannel and electrochemical sensor in plan view
  • FIGS. 6 c to e are cross sections of the microchannel of FIG. 6 b with fluid progressively entering the channel;
  • FIG. 8 a shows a further embodiment of the invention, in the form of a single-use device with an integrated puncturing means
  • FIG. 8 b is a cross section through a user's skin having the device of FIG. 8 a therein;
  • FIGS. 8 c and 8 d depict the construction of a device similar to that in FIG. 8 a;
  • FIG. 8 e is an alternative embodiment, shown in perspective view, of a puncturing means
  • FIG. 8 f is a still further embodiment of an alternative puncturing means shown in perspective view
  • FIG. 8 g is a side-sectional view of the embodiment of FIG. 8 f taken along line X-X in FIG. 8 f;
  • FIG. 8 h is a cross-sectional view of the lance of FIG. 8 e in tissue
  • FIG. 8 i shows an integrally formed base member and lance showing a vent and a capillary sensing channel, but with upper laminate removed for clarity;
  • FIG. 12 a is a perspective view of a microchannel
  • FIG. 12 b is a close-up, partial, perspective view of a microchannel; whereby electrodes are provided on opposing sides of a fluid channel by forming a first channel which is filled with a conductive material, and forming a second channel for conveying the test fluid, the second channel cutting across the first thereby thereby forming two conductive portions within respective opposite sides of the second channel.
  • FIG. 17 a is top view, taken in perspective, of a first preferred embodiment of a chip for extracting and distributing a fluid sample and having a meander shaped waste reservoir;
  • FIG. 17 b is the view of the embodiment of FIG. 17 a modified to illustrate a column shaped waste reservoir
  • FIG. 18 is a bottom view, taken in perspective, of the chip of FIG. 17 a;
  • FIG. 19 is a plan view of a measurement channel of the chip of FIG. 17 a;
  • FIG. 20 a is a plan view of the meander shaped waste reservoir of the embodiment of FIG. 17 a;
  • FIG. 20 b is a plan view of the column shaped waste reservoir of the embodiment of FIG. 17 b ;
  • FIG. 21 is a plan view of the switching mechanism shown in FIG. 20 a.
  • FIG. 1 there is shown a skin patch 2 suitable for measuring the level of blood glucose in a user.
  • Patch 2 is made up of two layers 3 a and 3 b
  • the lowermost layer 3 a is made of an suitable microfabricated plastic such as polyester, polycarbonate, polystyrene, polyimide, or other suitable microfabricatable polymers of suitable dimensions to allow it to be worn comfortably for a prolonged period of time, and optionally has an adhesive on its underside to allow the patch to be securely attached to the skin of a user.
  • An optional pressure ring ( 5 ) is designed to apply pressure to the surface of the skin to enhance the flow of fluid from the body of the patient into the device.
  • the pressure means may also be integrally formed and of the same material as that of 3 a .
  • the drawing is not to scale and thus the various features may be of a different relative thickness dimension than illustrated. It is understood that FIG.
  • a penetration device ( 4 ) e.g. a needle, lancet or cannula is attached to the lowermost layer 3 a , through which fluid passes into the collection and fluid collection and distribution port ( 7 ) formed in the upper surface of layer 3 a .
  • Layer 3 a has on its upper surface microfabricated channels.
  • Port ( 7 ) is also formed by the same microfabrication process as the microchannels.
  • a substrate layer 3 b Laminated to the lowermost layer is a substrate layer 3 b , preferably formed of the same material as that of the lowermost layer. This serves to close the microchannel.
  • the microchannel and penetration member may optionally be coated with a hydrophilic material and/or an anti-coagulant such as a heparin attached to the inner surface such that during use it will not diffuse away.
  • the microchannel system 8 corresponding electrochemical detectors 11 and optionally the electro-osmotic pump systems 10 and the hydrophobic gates 12
  • Each of the electrochemical detectors 12 and electro-osmotic pump systems 10 are electrically connected via conductive tracks (not shown) to respective terminals (not shown) at the edge of the patch. Not shown in FIG. 1 are the fluid reservoirs.
  • FIG. 2 a shows another embodiment whereby hydrophobic gates are present on either side of the sensor.
  • a controller unit 102 is brought into contact with these terminals so as to make electrical contact in use in order to transmit the measurement output signals between the patch and a display unit 103 (see FIGS. 3 and 4).
  • a control unit 102 for the patch 2 is shown in FIG. 3. As may be seen, this sits on top of the patch 2 and is secured to upper side of the patch in a suitable manner(not shown).
  • the control unit serves to control the fluid pumping mechanism, hydrophobic gates, fluid switching means and analyte sensors.
  • the control unit is also provided with means such that radio frequency communication may be made, for example with the meter, for transmission and receipt of data.
  • the control unit would also determine when all the microchannel/sensors had been used and transmit a signal accordingly.
  • the control unit would also have means to detect any malfunctioning of the device and to also transmit this information.
  • the control unit 102 is preferably battery operated and is capable of transmitting signals to a wireless display unit (FIG. 4) for example a radio frequency communication.
  • a wireless display unit for example a radio frequency communication.
  • FIG. 2 b shows a multichannel arrangement with the proximal end of the needle 4 is in fluid communication with a fluid collection and distribution port ( 7 ) formed in the substrate layer 3 b of the patch. Radiating out from the manifold 6 are eighteen of the microchannel systems 8 . Not shown is the fluid switching means.
  • microchannel system 8 is shown in greater detail in FIG. 6 b .
  • the microchannel 608 is in direct communication with the port 607 into which the fluid flows from the needle 4 .
  • Downstream of the port 607 is an electrode system comprising a pair of inert electrodes 610 providing electrosmotic flow.
  • the electrodes are formed on a second substrate layer 3 b (omitted from this figure for clarity).
  • the second substrate layer is then laminated onto the first substrate layer 3 b thereby closing the microchannel 126 and bringing the electrodes 610 into contact with it.
  • the electrodes 610 are positioned adjacent to each other, together forming an electro-osmotic pump system. By applying a voltage difference across the electrodes, an electric field is generated which drives fluid along the microchannel 608 .
  • hydrophobic gates 612 Positioned along the microchannel 608 is one or more hydrophobic gates 612 which prevents the flow of fluid by capillary action along the microchannel. Downstream of the hydrophobic gate 128 is an electrochemical sensor 611 comprising at least two electrodes also formed on the upper substrate layer 3 b . At least one further hydrophobic gate similar to the first, is optionally provided downstream of the sensor 12 . This serves to stop the flow of fluid past the electrodes to allow the possibility for an end-point detection of the analyte.
  • hydrophobic gates may be constructed of any suitable material, including, but not limited to, PTFE, polycarbonate, polyisobutelene, PMMA, dodecyl acetate, silicon rubber, synthetic way, octadocyl mercaptane, dodecyl mercaptane, and/or octa decyltrichloro silane.
  • the controller unit 102 is provided with control means or means to initiate the flow of interstitial fluid sequentially to each of the microchannels ( 8 ) after a predetermined period of time. Once all the tests on the patch 2 have been performed, the controller 102 transmits a signal to the display means 103 to alert the user so that the patch 2 can be discarded and a fresh one applied.
  • FIG. 6 a An alternative form of microchannel 126 is shown in FIG. 6 a .
  • the optical sensor comprises a reaction chamber 616 which for example contains Glucose oxidase (GOD) Horseradish Peroxidase (POD) and a leuco-dye, (a colourless precursor of the dye molecule).
  • GOD Glucose oxidase
  • POD Horseradish Peroxidase
  • leuco-dye a colourless precursor of the dye molecule.
  • 2,2-Azino-di-[3-ethylbenzthiazoline-sulfonate The optical system is not limited to the above example and could comprise any suitable enzyme-dye combinations.
  • the reaction which takes place is as below:
  • the chamber 129 has an optically transparent upper surface. This arranged is to be aligned with the tip of an optical fibre in a modified control unit (not shown) so that the fibre is approximately 2 to 3 mm above the dye spot. The other end of the fibre is in optical contact with a light source and light sensitive diode sensor which is sensitive to a particular wavelength of light (for example 438 nm in the case of ABTS) emitted by the transformed dye. The degree of absorption therefore gives a measure of the amount of transformed dye and thus the amount of glucose present.
  • a light source and light sensitive diode sensor which is sensitive to a particular wavelength of light (for example 438 nm in the case of ABTS) emitted by the transformed dye.
  • glucose present in the fluid acts as a substrate for GOD, which breaks the glucose down into glucono-1,5-lactone and hydrogen peroxide. POD subsequently catalyses the oxidation of the leuco-dye using the hydrogen peroxide, resulting in the production of a coloured dye which is subsequently detected.
  • any suitable leuco-dye may be used, e.g. Tetramethylbenzidine-Hydrochloride, or 3-Methyl-2-Benzothiazoline-Hydrazone in conjunction with 3-Dimethylamino-Benzoicacide.
  • microchannels described as hereinbefore use electrochemical or colorimetric means to detect glucose.
  • detection means such as infra red detection, filter photometry or Kromoscopy may be used.
  • FIG. 5 shows schematically a further preferred embodiment of the invention. Similar construction to that of the previous embodiments and thus it has a hollow needle 106 , for example but not limited to 1.4 mm long and 0.3 mm wide which penetrates substantially the cutaneous layer of the skin 113 of the user.
  • the needle 106 also acts as an electrode which serves to extract fluid from the skin. At least one electrode 108 is provided such it makes contact with the skin. As shown in FIG. 5, the needle is poised at a positive potential. By applying a voltage difference across the electrodes 106 and 108 an electric field is generated along the needle 106 and manifold 111 which stimulates the skin and increases the perfusion of interstitial fluid out of the skin.
  • FIGS. 8 a to 8 d show two further embodiments of the invention.
  • these are both single-use strips suitable for measuring blood glucose of a user. They are therefore used in a similar way to conventional test strips. However a principle difference is that each has an integrated lance 119 at one end.
  • the device 115 shown in FIG. 8 a is made essentially of a layer 116 onto which a second layer is attached or laminated (not shown).
  • the lowermost substrate layer 116 comprises a moulded or stamped microchannel 118 , as well as the integrally formed lance 119 arranged in close proximity with the entrance 103 of the microchannel.
  • the microchannel 118 maybe coated with suitable reagents, such as glucose oxidase in the case of glucose detection, which can be applied by any conventional means, such as printing for example screen-printing or ink-jet printing, or spray coating during manufacture.
  • the microchannel may be free of enzyme, the reagents being provided on the electrode system ( 121 ) located on the underside of the uppermost layer ( 117 ).
  • the uppermost layer 117 may also be a conventional biosensor test-strip which could be attached to the lower surface such that the electrodes are positioned on the underside of the formed channel.
  • This particular electrode system 121 comprises three electrodes 221 of which at least one is covered with layers of enzyme and electron mediator such as glucose oxidase and ferricyanide to form a working electrode for detecting glucose, as is well known in the art, the other two being a counter and reference electrode.
  • the electrode system may comprise two working electrodes which serve to compare currents at each and measure the channel filling speed of the blood or interstitial fluid. Alternatively the electrode system could comprise just two electrodes, a working and counter/reference. Not shown in FIGS.
  • 1 - 21 is a venting device such that air may be displaced upon uptake of fluid into the microchannel.
  • a vent or vents may be provided at any convenient location.
  • Corresponding tracks 321 allow electrical connection to be made to the electrodes at the distal end of the strip when it has been inserted into a suitable test meter.
  • the upper layer 117 may be slightly longer than the lower one 116 to allow access to the tracks 321 for this purpose.
  • the lance 119 of the strip 115 in FIG. 8 a is essentially V shaped in cross section and tapers towards its tip. This means that when it is used to puncture a user's skin 123 , as is shown in FIG. 8 b , the two sides of the V force back a portion of the skin 123 , forcing the epidermis to form the remaining wall 123 of an enclosed channel 124 .
  • an open channel is effectively transformed into a closed one when it is inserted into skin.
  • the microchannel 118 may also be formed with a V shaped profile for convenience of fabrication, but this is not essential as may be seen from the slightly modified embodiment of FIGS. 8 c and 8 d in which the microchannel 118 ′ has a rectangular profile.
  • the user pierces their skin with the lance 119 and interstitial fluid or blood is made to flow, by means of capillary action, through channel 124 formed by the lance ( 119 ) and the skin 122 , into the microchannel 118 and thus over the electrochemical detector 121 .
  • the user then withdraws the strip 115 and inserts the opposite end into a conventional style test meter which makes electrical connection to the three conductive tracks 321 .
  • the meter is an integral part of the lancing system such that the user does not need to insert the strip into the meter and is automatically provided with the measurement result.
  • FIGS. 8 e through 8 h show alternative embodiments of lances for penetrating into a body-fluid laden layer of skin as an alternative to the embodiment of the lance 119 of FIGS. 8 a and 8 b .
  • the lance 119 a is an integrally formed pointed protrusion from the device 115 (not shown in FIGS. 8 e but identical to that in Fog. 8 a ) with a longitudinal capillary channel 121 a cut completely through the thickness of the lance 119 a .
  • the lance 119 a is provided with an enlarged area 123 a of the channel 121 a .
  • the enlarged area 123 a also is cut completely through the thickness of the lance 119 a .
  • the capillary channel connects with the microchannel 118 of the device 115 of FIG. 8 a.
  • FIG. 8 h the embodiment of FIG. 8 e permits fluid to enter into the capillary channel 121 a from opposite sides of the lance 119 a and with the wall of the skin cooperating with the walls of the lance 119 a to define an enclosed channel 121 a . Fluid then can accumulate in the pooling area 123 a and flow from the pooling area 123 a into the capillary channel 121 a as well as flow directly from the skin into the capillary channel 121 a for passage to the microchannel 118 .
  • a lance 119 b is of a design similar to that of FIG. 8 e is shown but excluding the large pooling area 123 a . Elimination of the pooling area 123 a permits a narrower transverse dimension to the lance 119 b.
  • the base member 116 and lances 119 , 119 a , 119 b can be stamped from electrically conductive material.
  • the base member may be an electrode.
  • An electrically conductive base member and lance can be stamped from metal as described or formed in any other acceptable manner (e.g., photochemically etching a metal stock material, machining or other fabricating technique).
  • the electrically conductive base member can be made of stainless steel it can be also be plated with a second metal such as for example gold platinum or silver.
  • the electrically conductive base material may also be used as a counter electrode.
  • FIG. 8 i shows an integrally formed base member and lance stamped from preferably one piece of sheet metal.
  • the metal is preferably, but not limited to, stainless steel optionally coated with a noble metal such as gold or silver.
  • a microchannel 84 onto which a second layer such as a test-strip could be attached. It is intended that such a device as illustrated in FIG. 8 i would be incorporated into a lancet firing device such that the device could be fired into the skin.
  • the individual devices may be loaded and stored in a cassette comprising individually sealed pouches. Such a cassette could also be stored within the lancet firing device.
  • the stamped penetration member with a rectangular vent 81 which also serves as a capillary break ensuring that once fluid is taken up by the lance 83 into the sensing zone 82 , the flow of fluid is halted.
  • the vent may be of any suitable size or shape.
  • FIGS. 17 a - 21 the present invention will now be described with reference to a most preferred embodiment of the invention in an ex vivo continuous monitoring system.
  • the ex vivo continuous monitoring system consists of several major subsystems including sample extraction, sample fluid distribution, and electrochemical detection. As will be more fully described below, a body fluid sample can be extracted from the skin and guided into a channel for the electrochemical determination of glucose concentration.
  • the body fluid is directed into a different, previously unused channel. This process avoids false results otherwise arising from fouled electrodes or denaturant enzymes. Since the channels into which the fluid is re-directed are not filled with a sample solution or any other liquid, the electrochemical system in the channel will not show aging effects.
  • FIGS. 17 a , 17 b show embodiments of such a chip 400 , 400 a .
  • each chip 400 , 400 a has for example, but not limited to, twelve measurement channels 402 , 402 a with switching mechanism 404 and 404 a and waste reservoirs 406 , 406 a .
  • Differences in the embodiments of chips 400 , 400 a will be described below with initial description being limited to a discussion of chip 400 . It will be appreciated that chip 400 a is identical to chip 400 except as will be described. Similarly elements are numbered similarly with the addition of an “a” to distinguish embodiments.
  • the chip 400 has an edge connector 401 for electrically connecting electrodes (as will be described) to a controller (not shown).
  • a controller can contain logic, memory and processors for controlling the electronics of the chip 400 and optionally displaying any outputs (as, for example, the function and operation of controller 102 in FIG. 3).
  • the measurement results are transmitted by radio frequency by the controller to a remote control allowing the user to view the result and optionally to communicate or interact with the controller of the monitoring system.
  • the sampling chip 400 extracts body fluid from the skin.
  • the chip 400 extracts interstitial fluid (ISF) from substantially the cutaneous layer of a patient.
  • ISF interstitial fluid
  • the chip 400 includes a suitable cannula or needle 410 , a spring-loaded hub 412 to pressurize the skin and means such as an adhesive 414 to fix the chip 400 to the skin.
  • Sampling modules with needles and spring-loaded hubs are shown in U.S. Pat. Nos. 6,203,504 and 5,746,217. It will be appreciated the foregoing description is a preferred embodiment. Any technique for obtaining a sample of body fluid may be used in combination with the teachings of the present invention.
  • the needle 410 discharges the body fluid into a common distribution depression 416 shown best in FIG. 19).
  • the distribution depression 416 is in fluid flow with the micro-channels 402 .
  • the shape and the volume to the distribution depression 416 is preferably a disk shaped void with 1 mm diameter and 100 ⁇ m depth. These dimensions and shape may vary depending upon the size, number and flow rate of individual channels.
  • a portion of the micro-channel 402 between the distribution depression 416 and a ground or reference electrode 420 may be restricted in size to reduce flow rate variability and therefore control the rate of flow.
  • Means may be provided within the device for the removal of undesirable gas-bubbles from the fluid sample.
  • Such means could comprise a filter positioned between the needle and the common reservoir.
  • the electrochemical detection system consists of an electrode system shown best in FIG. 19.
  • the electrode system includes at least one working electrode 418 (by way of non-limiting example, gold or carbon) and a reference electrode 420 (e.g., silver/silver-chloride).
  • the reference electrode 420 is circular to serve as a common electrode for each channel 402 , thus reducing the number of contacts necessary.
  • each channel can be provided with a unique reference electrode.
  • Each channel 402 has a unique dedicated working electrode 418 .
  • a counter electrode (not shown) may be added.
  • the electrodes 418 , 420 are disposed to contact fluid in the channel 402 .
  • the channels 402 are formed as open channels in a substrate layer.
  • the electrodes 420 , 418 are screen-printed on an overlying laminate layer which also serves to seal the channels 402 .
  • the working electrode material is dependent on the enzyme ink being used. For example, one can distinguish between a redox-mediated system for the carbon working electrodes and an oxygen mediated system for the gold or platinum electrodes.
  • an organo-metal-complex (which is linked to polymers forming the ink body) acts as a conductor and electron acceptor for the enzyme.
  • the electrons are transported by the redox-mediator directly or by an electron hopping mechanism from redox-center to redox-center to the working electrode.
  • the mediator is finally recycled to its original redox-state before it can react with the enzyme protein in a new cycle.
  • glucose oxidase from aspergillus niger (GOD EC 1.1.3.4) and PQQ dependent glucose dehydrogenase (GDH EC 1.1.99.17).
  • the enzyme ink is a cross-linked hydrophilic gel allowing the penetration of sample fluid but restricting the movement of the enzyme thus it is fixed to the electrode. This is an important property of the enzyme ink because the concentration of the enzyme has an effect upon the total response of the sensor. The same effect can be observed with the redox-mediator, due to the small molecular weight it cannot be entrapped in the same way as enzymes. Therefore, in the preferred embodiment, it is preferred to link the redox-mediator molecule to the large molecules such as the enzymes, proteins, or to the polymers of the ink material directly. In case of oxygen-mediated systems the situation is simpler.
  • the enzyme ink needs only to contain enzyme as active component, the oxygen itself is dissolved in the sample fluid and is transferred to the sensor from the sample stream in the same instance as glucose.
  • the oxygen-mediated system can be created with GOD based on the ability of the enzyme to build hydrogen peroxide from oxygen and glucose.
  • Ox oxidized mediator species e.g. K 3 [Fe(CN) 6 ], p-benzoquinon, Ferrocinium
  • Red reduced mediator species e.g. K 4 [Fe(CN) 6 ], hydroquinone, Ferrocene
  • Hydrogen peroxide is a very reactive molecule, which can function as mediator to transport electrons for the enzyme to the electrode surface.
  • the electrodes are deposited on a film such as polystyrene or polycarbonate of about 10-200 ⁇ m and, more preferably, about 30 to 75 ⁇ m) using screen-printing technology. Subsequently to this print step the working electrode is coated with ink containing enzyme and in the case of carbon working electrodes with an ink containing enzyme and mediator.
  • a film such as polystyrene or polycarbonate of about 10-200 ⁇ m and, more preferably, about 30 to 75 ⁇ m
  • This coating step could be accomplished with the same printing methods as used for the electrode material. Thus the production could be done in one machine with different print heads or stations on a continuous web. Such a process is described in “Continuous Process for Manufacture of Disposable Electrochemical Sensor”, U.S. patent application Ser. No. 09/537599.
  • FIG. 19 A schematic diagram of one measurement channel 402 is shown in FIG. 19.
  • the channel 402 extents from the needle 410 and distribution depression 416 and through the main channel 402 (of dimensions for example of 200 ⁇ m ⁇ 100 ⁇ m) containing the electrodes 418 , 420 .
  • a flow restricted portion of the channel 402 namely a small cross section (e.g., 30 ⁇ m ⁇ 30 ⁇ m) may be provided between the distribution depression 416 and the common electrode 420 .
  • a flow restriction levels out different flow rates during the extraction of the body fluid. These flow rate differences are caused due to the changing physiological conditions during the extraction. In general, one could observe a higher flow rate at the beginning of a sampling period compared to the extraction rate at the end. A thin capillary can counter-act this behavior.
  • the electrodes 418 , 420 are not part of the injection molded base plate of the chip 400 . Instead, they are placed on top of the open U-shaped or rectangular channel 402 of the base plate of the chip 400 in a separate lamination step.
  • the waste reservoir 406 stores the sample solution after its evaluation by the electrochemical sensing in channel 402 .
  • the size of the waste reservoir 406 defines the amount of time one channel can theoretically be used.
  • the controller can activate the next channel to continue with the detection of glucose in the body fluid of a patient.
  • the reservoir 406 is large enough to support more then a two-hour measurement.
  • a chip 400 with twelve channels 402 can run for 24 to 28 hours allowing the patient a convenient change to a new chip (e.g. during his daily morning routines).
  • reservoirs 406 larger then 5 ⁇ L (which is enough to support the flow for more then two hours with a flow rate of 30 nL/min) could allow longer runtimes.
  • the entire chip 400 could last for more than one day.
  • the number of channels in a device is not limited and may vary depending upon the measurement technique, the length of monitoring period and the size of the device and could exceed 100 .
  • FIGS. 20 a , 20 b show two different representative embodiments of the waste reservoir 406 , 406 a .
  • Waste reservoir 406 is a meander-shaped extension of the channel 402 . While easy to manufacture, such a design can build up high back pressure in the system, due to the weaker capillary force, then the design of waste reservoir 406 a and is not as space efficient.
  • the column filled reservoir 406 a has advantages compared to the meander-shaped reservoir 406 regarding the size and the integration into a 12-channel chip 400 a . It could be deeper than the reservoir 406 while producing a higher capillary force to take up the extracted and evaluated sample fluid from channel 402 a .
  • waste channel 406 a resembles a plurality of capillaries with a cross-section for example of 400 ⁇ m ⁇ 400 ⁇ m compared to only one-capillary with the same cross-section in the design of waste reservoir 406 .
  • the shape of the columns is not limited to simple squares. They could be formed as circles, pentagons, hexagons, octagons or the like. Concerning the flow characteristics inside a column field the hexagon shaped columns shown are the most preferred version.
  • the size and geometry of the channels and reservoirs may vary.
  • the base plate of the chip 400 can be produced in a molding process, which is optimized for the small features and structures.
  • plastics can be used for the base plate of the chip 400 (e.g. polystyrene, polycarbonate, polymethymethacrylate, polyester, and others).
  • Preferred polymers are polycarbonates. These allow a subsequent laser finishing to generate a secondary micro- or nano-structure (e.g., any desired patterns or other finishing can be formed in the micro-channel).
  • Polystyrene shows preferable characteristics in the lamination process. Thus polycarbonate could be used as the lower laminate and polystyrene used as the upper.
  • the chip 400 itself consists of three major part a) the chip base plate with all the fluidic elements described above, b) the electrochemical detection system screen printed on a polymer foil, and c) the sampling hub with extraction needle. These elements are described in the foregoing sections.
  • the most advantageous process is an adhesive-free thermal bonding process of the pre-printed foil to the chip base plate.
  • the bonding happens at an elevated temperature with a stamping tool or a hot roller press.
  • the temperature is close to the glass transition temperature (T g ) of the polymer thus the low molecular weight portion of the polymer will become mobile and tacky while the high molecular weight portion of the polymer still supports the integrity of the foil or film.
  • T g glass transition temperature
  • the low molecular weight portion of the polymer will bond both pieces (base plate and foil with electrodes) together, additionally it will follow the shape of the printed electrodes, which can be between 5 and 30 ⁇ m thick.
  • the switching mechanism 404 allows the replacement of a used electrochemical system after a predetermined period of time.
  • an electrochemical system is prone to fouling due to precipitation or adsorption of proteins or other species on the electrode surface.
  • a different strategy is the protection of the electrode by a semi permeable membrane, which allows the analyte to pass through to the electrode but not a large protein (or a red blood cell). This concept is adopted in classical oxygen electrodes.
  • the chip 400 uses a mixture of both concepts: a plurality of electrodes in diff rent channels as well as an electrode protected by screen printable membrane (see German patent DE10052066.9 and related International patent application PCT/EP01/12073). This allows the sensor electrodes to operate for several hours before the fouling shows a significant effect on the results and before the controller is switching to the next channel.
  • FIG. 21 shows a schematic diagram of the switching mechanism 404 .
  • the switching system 404 includes electrodes 422 separate from the electrochemical detector electrodes 418 , 420 .
  • the switching electrodes 404 allow local heating of a very small area on the thin foil such as polystyrene 424 overlying a well 426 .
  • the well 426 is in fluid flow communication with the end of the reservoir 406 except that the fluid flow is normally blocked by the foil 424 . Due to this blockage, air cannot escape from the channel 402 and fluid from the distribution depression 416 cannot flow into the channel 402 . Upon heating of the foil, this blockage is removed thus allowing the fluid to enter the channel.
  • the temperature at the center point of the overlying electrodes 422 i.e., overlying the foil 424 above the well 426 ) very quickly rises over the glass transition temperature (T g ) of the foil in response to an application of a small current in the range of some ⁇ fraction (1/1000) ⁇ Ampere with the effect that the foil 424 forms an opening above the hydrophobic well 426 allowing air in the channel 402 and reservoir 406 to vent into the well 426 .
  • the gas pressure in the channel 402 is relieved and fluid can flow from the distribution depression 416 and into the channel 402 .
  • the hydrophobicity of the well 426 prevents the sample fluid from flowing into the well 426 and leaking out of an opening formed in the film by reason of the energized electrodes 404 .
  • the controller opens a subsequent channel 402 by energizing its switching electrodes 422 to permit air to escape from the channel 402 and for the subsequent channel 402 to fill with body fluid. It should be appreciated that other methods for switching between channels and controlling fluid flow could be used and the invention is not limited by the above method
  • the controller determine if the waste reservoir 406 is filled, is still filling at a constant rate, or if the needle 410 has dislodged from the cutaneous layer of the patient and the continuous sample stream has stopped.
  • the waste reservoir 406 can be equipped with two electrodes (not shown) at the top and the bottom of the reservoir. Not in electrical contact with the sample fluid, these electrodes could measure the change in capacitance while the air inside the structure is slowly exchanged with sample fluid. The rate of the capacitance change will be directly proportional to the flow rate of the sample fluid and allow a close monitoring of the ongoing extraction.
  • devices in accordance with the invention may measure the concentration of analytes other than those in bodily fluids.

Abstract

A glucose sensor in the form of a skin patch 2 has a microneedle 4 which painlessly penetrates the skin to draw out interstitial fluid. The interstitial fluid passes to a common entrance port 7. A series of microchannels 8 is provided on the skin patch. The fluid drawn onto the patch is selectively switched between a number of microchannels 8 by means of electro-osmotic pumps 10 and hydrophobic gates 12. Each microchannel 8 has an electrochemical detector 11 for sensing gluocse concentration.
Also disclosed is a monlithic device with an integrated lance 83.

Description

    I. BACKGROUND OF THE INVENTION
  • This invention relates to apparatus for and methods of measuring certain properties of a fluid particularly although not exclusively, bodily fluids and the concentrations of certain analytes therein. At least some aspects of the invention relate particularly to the measurement of glucose levels in blood and other body fluids such as cutaneous (interstitial) and sub-cutaneous fluid. [0001]
  • Over recent years there have been two obvious trends in diagnostic device development: simplification of the test procedure and reduction in the volume of sample required to perform the test. Test simplification allows the assay to be performed by relatively untrained personnel in a “non-laboratory” setting. Thus, for example, cardiac marker tests configured in a lateral flow immunoassay format with labelled antibody allow for early assessment of potential myocardial infarct. [0002]
  • The driving force for the development of tests requiring smaller sample volumes is the reduction of discomfort of the patient. This is particularly important in home tests where, for example, if a glucose test is less painful the user will test more frequently. It is now well documented that diabetics who monitor their blood sugar frequently achieve better glycaemic control and so avoid long-term complications of the disease. With this thought in mind, a number of companies have developed test devices requiring progressively smaller sample volumes, thereby minimising pain. [0003]
  • Some proposals have been made to attempt to reduce the amount of pain involved by with so-called minimally invasive devices (e.g. Integ U.S. Pat. Nos. 5,746,217; 5,820,570; and 5,582,184). Unfortunately, such devices appear to be unable to provide sufficient fluid sample to provide a reliable result and thus, as yet, none has been commercially realised. [0004]
  • In the context of glucose measurement, so-called continuous monitors are also known and these have certain advantages over the ‘snapshot’ devices outlined above since they provide a clearer insight into trending, the effect of food or medication and overall glycaemic control. Such known devices however suffer from a number of drawbacks, mainly associated with the need to recalibrate the device regularly. This entails performing regular manual tests using a conventional test strip. This can negate many of the advantages of using a continuous device since the user is still relied upon to take action in order for the device to operate properly. Furthermore the accuracy of the devices tends to drift unpredictably between calibrations. The regular finger pricks are also painful. Examples of continuous monitoring sensors include International patent application PCT/DE99/03126 (International Publication WO 00/22977 published 27 Apr. 2000) and International patent application PCT/US99/16378 (International Publication WO 00/04832 published 3 Feb. 2000). [0005]
  • II. SUMMARY AND OBJECTS OF THE INVENTION
  • It is an object of the invention to provide an improved arrangement and when viewed from a first aspect the invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member, analyte sensing means provided thereon for measuring said concentration and a microchannel in fluid communication with said analyte sensing means for conveying said fluid to said sensing means. [0006]
  • Thus it will be seen that in accordance with the invention a microchannel is used to convey the sample fluid to the sensing means. [0007]
  • As used herein the term “microchannel” refers to a channel, of any suitable cross-section, whose lateral dimension is between approximately 10-500 μm. [0008]
  • Such microchannels are beneficial for a number of reasons in the context of an analyte sensing device. In the context of the measurement of a bodily fluid a small sample volume is beneficial since it means that it is easier to provide a sufficient volume for a valid test. Most importantly the volume of fluid required to carry out an assay is correspondingly small, in addition the microchannel allows to handle flow rates between 10 and 500 nL/min with a high resolution of the measurement over time, due to the low channel volume. The analyte sensing means can be arranged in any suitable configuration depending on the type of sensing means used (electrochemical, optochemical etc.). Preferably the analyte sensing means comprises one or more reagents to react with said analyte and thereby give a measurable output. Such a reagent may be located anywhere, but preferably the reagent or at least one of the reagents is provided on a wall of the microchannel. This arrangement is beneficial since it means that no additional volume is required in order for the sample liquid to be brought fully into contact with the reagent—i.e. the contact area is optimised. When viewed from a second aspect the invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member and a microchannel provided on said support member for conveying said fluid across the support member, wherein one or more reagents for reacting with said analyte is coated on a wall of the microchannel. [0009]
  • Preferably such a device further comprises means for sensing the analyte—for example an electrochemical or a photometric detector. [0010]
  • The devices set out hereinabove may be used for measuring any suitable analyte in any suitable fluid. However the invention, in its various aspects, finds particularly beneficial application in the measurement of analytes in human or animal bodily fluids. Of course, a suitable sample of bodily fluid may be applied to the device. Preferably however the device is integrated with means for extracting the fluid. Most preferably this comprises means for penetrating the skin—in the case where the sample fluid is blood or interstitial fluid. Most preferably it comprises a skin penetration member such as hollow needle, solid lance or the like. [0011]
  • In accordance with the embodiments set out above the device can be used both to collect the sample fluid and to measure the concentration of the target analyte—or at least give an output from which the concentration can be measured. When viewed from a further aspect the present invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member, means provided on the support member for sensing said analyte, wherein said support member further comprises fluid extraction means arranged to direct fluid to said analyte sensing means via a conduit on the support member. [0012]
  • Thus it will be seen that in accordance with this aspect of the invention a fluid extraction means, preferably a skin penetration means, most preferably a needle, lance or the like, is provided on a support member of a device for measuring analyte concentration. This allows, in at least preferred embodiments, the combination of skin penetration means, e.g. needle, and support member, e.g. test strip, to be made disposable and thus as hygienic as possible. The preferred embodiments require a user merely to puncture their skin with a needle or the like and then blood or interstitial fluid may be conducted automatically onto or into the test member. Devices for extracting interstitial fluid are shown in the afore-mentioned Integ patents and International patent application PCT/US01/09673 (International Publication WO 01/72220 published 4 Oct. 2001). [0013]
  • In such embodiments the combined needle/test member would normally be used in conjunction with a separate, non-disposable, measuring device for measuring the analyte concentration e.g. by means of the output of an analyte-reagent reaction, where appropriate. [0014]
  • The dimensions of the needle, lance or the like may be suited to the particular application. In fact, any mechanism for extracting interstitial fluid may be used with the present invention. While the present invention will be described with reference to a shallow penetration needle, the invention is application to any technique for obtaining a body fluid. [0015]
  • For example a standard hypodermic needle several centimetres in length may be employed. Whilst the device may be used to sample interstitial fluid or blood from the cutaneous and/or the subcutaneous layers, in preferred embodiments however, the penetration member is of such a length that it penetrates substantially the cutaneous layer of skin. When the term “substantially the cutaneous layer” is referred to, it means that whilst it is the intention to sample fluid from the cutaneous layer, it cannot be ruled out that some sampling from the sub-cutaneous may occur. The cutaneous layer has a high density of blood capillaries which helps to ensure that the levels of analytes in interstitial fluid reliably reflect those in the blood. [0016]
  • While not limited to analysing interstitial fluid (ISF), the present invention is preferably used in obtaining and analysing ISF. A further benefit offered by interstitial fluid is that it is not as complex as whole blood and therefore does not, for example, suffer from Haematocrit fluctuations. ISF also has a low viscosity and is more suited to passage through microchannels than whole blood. The low sample volume requirement of a microchannel also enables the device reliably to use interstitial fluid. [0017]
  • Perhaps more improtantly such shallow skin penetration (cutaneous or subcutaneous) substantially reduces the pain experienced since there is a much lower density of nerve endings than at the depths penetrated by standard needles when extracting blood. Indeed, in at least preferred embodiments, little or no pain is normally felt. This makes prolonged and/or repeated penetration of the skin much more acceptable. [0018]
  • The actual length of the penetration means will depend on the angle at which it is intended to be inserted. Thus if shallow angle penetration is intended, the length may by of the order of several millimetres e.g. up to approximately 7 to 10 millimetres. Preferably however substantially perpendicular insertion is intended and the length is less than 2 mm, preferably less than 1.5 mm. In some preferred embodiments a length of approximately 1.4 mm is appropriate. However for certain applications a length as short as 0.5 mm may be preferred [0019]
  • Of course a given test member may have just one skin penetration member, or alternatively a plurality may be provided. [0020]
  • The penetration means may comprise a sufficiently short standard needle, possibly shortened if necessary. More preferably the penetration means comprises a microneedle. A microneedle is hereby defined as a needle with a length sufficient to penetrate the cutaneous layer of human skin without substantially penetrating the subcutaneous layer. Such a needle typically has length less than 2 mm, preferably between 0.4 and 1.6 mm. [0021]
  • The outer diameter is preferably less than 0.5 mm, most preferably between 0.1 and 0.3 mm. [0022]
  • The penetration means need not be integrated with the support member, but preferably is. The comments above regarding this arrangement apply, with the additional benefit noted here that preferred embodiments of this arrangement can provide a compact disposable device which gives rise to substantially no pain, in use and obviates the need for a user to come into contact with or even see the bodily fluid concerned. [0023]
  • In a particularly preferred embodiment the analyte is glucose. [0024]
  • Preferred embodiments of the invention use a reagent-based measurement. Many different reagent-based analyte measurements are available to those skilled in the art, allowing the principles of the invention to find wide application. For example an optochemical—i.e. either fluorescent or luminescent—or an electrochemical technique could be used. [0025]
  • One preferred embodiment comprises analyte sensing means comprising a mediated amperometric enzyme electrode. For example, a ferrocene-mediated electron transfer from a glucose-oxidase catalysed reaction is a suitable means for detecting the level of glucose in a body fluid. Other enzymes, such as lactate oxidase or lactate dehydrogenase and cholesterol oxidase dehydrogenase may be used to measure lactate and cholesterol levels respectively. It will be appreciated that use of the above electron-transfer mediator is a non-limiting example and that other electron transfer mediators well known in the art could be used, for example, hexa-cyanoferrate (ferricyanide), oxygen or components of the respiratory chain (i.e. cytochromes). [0026]
  • Preferably the embodiment will comprise an analyte sensing means which operates in conjunction with a test meter to give the measurement. Alternatively the member may comprise the appropriate reagent or dye for performing a calorimetric test in association with light sensitive means in the test meter. It will be seen that such arrangements are consistent with the test device being disposable since the costly elements of the sensing mechanism, such as the light sensitive means, electronic circuity etc., can be placed in a non-disposable test meter. [0027]
  • Just single analyte sensing means may be provided, but preferably more than one is provided. [0028]
  • Thus it will be seen that in accordance with this aspect of the invention, a plurality of conduits direct fluid to be measured to respective analyte sensing means. This means that a plurality of measurements of fluid may be made by a single such device. The sensing means may be different so as to measure or test for different analytes in the fluid. Preferably however they are the same or at least are for measuring the same analyte. When viewed from a further aspect the invention provides a device for measuring the concentration of an analyte in a fluid, comprising a support member and a plurality of analyte sensing means provided thereon for measuring said concentration, wherein said device further comprises a plurality of conduits such that each of said sensing means has a conduit associated therewith, said conduits serving in use to direct said fluid to respective sensing means. The device, whether it comprises a single or a plurality of conduit/analyte sensors, may be used to continuously measure the concentration of the analyte over a period of time. Periodic measurements may be taken i.e. the fluid is “sampled” at various periods over time, for example every 30 minutes. Fluid may continuously flow through the device or may be temporarily stopped by, for example, hydrophobic gates. As yet another alternative, the sensors may be of the single measurement type, after which the device is discarded or fluid is diverted to another conduit to perform another measurement. The total time taken to complete a measurement cycle or the time taken between measurements could vary and would depend upon the degree of monitoring or the analyte of interest. The plurality of conduits would allow for switching from sensor to another after a particular period of time, by diverting fluid flow from one conduit to another. Switching enables measurements to be performed without interruption to the fluid extraction or without having to recalibrate the sensors, which are known to drift after a period of time due to factors such as electrode fouling etc. [0029]
  • Thus analyte monitoring may be made on a truly continuous basis, without the user having to recalibrate or interact with the system. An advantage of performing a single measurement, either in the case of a device with a single or plurality of microchannels is that drifting of the signal over time is no longer an issue that has to be considered and consequently simpler reagent chemistries may be employed in the analyte sensors. For example in the case of an electrochemical detection system, results may be obtained in as little as five seconds or less. Furthermore, such devices would not require storage reservoirs for collection of the waste fluid, since the waste fluid would be stored in the microchannel conduits themselves. [0030]
  • In principle, there would be no upper limit to the number of sensor/conduits contained within a device, the upper limit being determined by factors such as the desired total length of time for analyte measurement or by the size of the device. [0031]
  • Whilst the above embodiments describe a flow-through sensor, i.e. the analyte is measured whilst flowing past the detection means, measurements may also be conducted whilst the fluid is stationary. This could be achieved by the use of flow controlling means such as a hydrophobic gate or gates being activated to temporarily stop the flow of fluid through the microchannel once it had passed the sensing means. Isolating or shutting off a volume of fluid from the rest of the fluid sample would enable an end-point determination of the total amount of analyte present in the particular portion of the sample to be made. [0032]
  • As described above, the sensing means may be electrochemical or non-electrochemical in nature—e.g. of the fluorescent or chemi-luminescent calorimetric sort. For example the sensing means may comprises an enzyme-coated electrode in the case of electrochemical measurement, or in the case of fluorescent colorimetric sensing the sensing means would comprise a suitable reagent dye. It will, of course, be understood that the term ‘sensing means’ does not necessarily refer to a complete assembly for giving a final reading, but rather to a means on the support member which yields an output which may be read to give a measure of the analyte concentration, e.g. by a separate test meter. [0033]
  • Such devices according to embodiments of the invention as set out above could be arranged to be used in a mode similar to conventional test strips i.e. where a single fluid sample is placed on the device and is measured. [0034]
  • In common with earlier aspects of the invention, devices of the sort set out above may be arranged to measure the concentration of any suitable analyte. In all such cases, the analyte's concentration may simply be an indirect indication of the property of the sample fluid which it is desired to monitor. For example a detection reagent (e.g. an enzyme substrate or an antigen) may be added to the sample so as to bind selectively and/or react with certain proteins in the fluid such as enzymes or antibodies. In this case the added detection reagent or the product of the enzyme-catalysed reaction, comprises the analyte. Devices in accordance with the invention can therefore be arranged to measure such analytes—i.e. it will be seen that such devices may be used to measure the activity of enzymes in a body fluid sample, or test whether antibodies to a particular antigen are present in the body fluid. [0035]
  • Preferably however, the device is arranged to measure an analyte concentration directly—i.e. it is the concentration itself which is being monitored. An example of such a measurement would be glucose in blood, the concentration of which is an important parameter for those suffering from diabetes. [0036]
  • In a particularly preferred embodiment the measuring device is suitable for measuring the concentration of an analyte, e.g. glucose, in blood or interstitial fluid. In such an embodiment the device is preferably suitable for attachment to the skin of the subject who is to be measured. The subject may be an animal but,is preferably human. [0037]
  • By providing a device which can be attached to a subject, measurements of the concentration of the substance in the subject's blood or interstitial fluid can be carried out repeatedly over a period of time. [0038]
  • This means that inconvenience and discomfort to the user is significantly reduced and moreover that tests can be carried out at regular intervals and at a greater frequency than would otherwise be tolerable. The result of this in the preferred application of the invention to blood glucose monitoring is that an improved insight into glycaemic control and the effects of food, medication and general trends on the glucose level is given. Moreover, by attaching the device to the patient and therefore making the device portable, it allows the patient to lead as normal life as possible. It also allows for the possibility of continuous measurements during periods when it may not be convenient to self-monitor by conventional manual methods of testing, for example during prolonged periods of exercise or whilst sleeping. The device could therefore include an alarm or means to activate an alarm in order to alert or wake the patient or any third party in case of a particular analyte level, for example in the case of hypoglycaemia. [0039]
  • Accordingly it is preferred that the devices comprise a penetration member with a sufficiently length substantially to penetrate the cutaneous layer of skin, most preferably integrally formed with the support member. It is further preferred that such devices comprises at least one microchannel for conveying the interstitial fluid to one or more of the sensing means. [0040]
  • When viewed from a further aspect the present invention provides a device for measuring the concentration of a given analyte in a bodily fluid comprising means for attaching the device to the skin of a subject and a plurality of sensing means for making a plurality of measurements of said concentration over a period of time. [0041]
  • It will be seen that effectively this aspect of the invention provides a device which can perform a plurality of measurements in situ, that is without user intervention being required. This has clear benefits in removing some constraints on the number, frequency and regularity with which measurements can be performed. Each sensing element in the device is designed to be used for a certain predetermined time during which the signal will not significantly drift over time. In this sense “significantly” represents the amount of drift permitted such the measurement result would not be affected by an clinically unacceptable amount. After such a period fluid is then switched to a new sensor and the process repeated. Preferably the device is provided with flow control means for influencing the flow of fluid to the sensing means. Any suitable flow control method may be employed with corresponding means to affect such a control method. For example Piezo-electric pumping, electrokinetic or mechanical methods such as ‘unblocking’ the flow along a selected conduit.—e.g. by allowing a gas bubble to escape or by opening a valve. [0042]
  • In certain embodiments the flow control means comprises a hydrophobic gate situated within the conduit/microchannel. A hydrophobic gate as herein disclosed refers to a hydrophobic surface region within a hydrophilic channel such that the flow of fluid is interrupted. By changing the hydrophobic nature of the gate, i.e. by making the hydrophobic region more hydrophilic, fluid may then be allowed to flow along the channel. Hydrophobic gates may be used to control the flow of fluid within a single microchannel or may be used to switch or redirect flow from one microchannel to another. [0043]
  • Alternatively, the hydrophobic nature of the gate may be maintained as it is and a increased pumping force (e.g. provided by a mechanical or electro-osmotic pump) may be applied in order for the fluid to breach the hydrophobic gate. [0044]
  • Preferably the device is arranged to direct fluid sequentially to each of the sensing means. The timing of the direction of the fluid to the sensing means could be pre-configured for example by software within the meter, such that the fluid is switched after a predetermined period of time. Preferably however the device comprises, or is adapted to interface with, control means to control said direction of the fluid to the sensing means. Such control is preferably automatic. [0045]
  • Additionally or alternatively however the control means may be such as to allow a user to specify when a measurement is to be made. This is beneficial as it allows measurement on demand which is useful for example in the case of blood glucose monitoring, as it allows the user to determine the effect on blood glucose of eating a particular snack or to determine how much insulin it is necessary to inject prior to eating or the user may simply want to carry out a check for reassurance. This enables the device to make periodic measurements of fluid from the body of the subject using fresh fluid for each measurement, thereby facilitating the desired object of monitoring the concentration of the substance in question over a period of time. [0046]
  • Where, as is preferred, each microchannel or other conduit is associated with a respective flow control means, each may be individually addressable by a suitable control means. This gives significant flexibility in how such a device may be used. [0047]
  • Preferably the device comprises a common fluid collection region in fluid communication with the bodily fluid to be measured—e.g. via a needle—each sensing means preferably being in selective fluid communication with said common collection region. Thus when viewed from a further aspect the present invention provides a device for making a plurality of measurements of the concentration of an analyte in a fluid comprising a common sample collection site in fluid communication with the fluid to be measured and a plurality of sensing means for measuring said concentration. [0048]
  • Where not otherwise specified, any suitable conduit may be provided for conveying the fluid to be measured to the sensing means, but preferred arrangements comprise microchannels as defined herein. Furthermore in the context of a plurality of analyte sensing means, the provision of microchannels allows many test elements to be positioned in close proximity thereby enabling even devices comprising a large number of sensing means to be made relatively small. This is beneficial in applications where the size and weight of the device is an important consideration, such as when it is attached to the user's body. [0049]
  • As well as the understood benefits per se of a low sample volume arising from the use of microchannels, the Applicants have realised that such a small sample volume makes it practicable to change the mode of testing. More particularly it has been realised that a very low sample volume means that rather than conduct the usual reaction rate measurement as in known electrochemical devices e.g. for detecting blood analytes such as glucose, where electron transfer is measured as a function of time to determine the rate of transfer, an end-point test can be carried out in which the total amount of analyte in the sample volume is measured, thereby consuming substantially all of the analyte. [0050]
  • It has been appreciated that this is advantageous over rate measurements since the latter tend to be prone to interference, temperature and Haematocrit fluctuations (in the case of using blood). Whereas such a measurement method would take a prohibitively long time with known measuring devices, by using microchannels in accordance with the invention to give a required sample volume of the order of a few nano-litres, such a measurement can typically be completed in the order of a few seconds, thereby making it a practical proposition. [0051]
  • When viewed from a yet further aspect the present invention provides a method of measuring the amount of an analyte in a sample of liquid comprising providing an electrochemical measuring device having a sensor electrode within a microchannel, introducing said sample liquid into said microchannel, and measuring an aggregate current passed by said electrode to give an indication of said amount of analyte in the sample. [0052]
  • This aspect of the invention also extends to an electrochemical device for measuring the amount of an analyte in a sample of liquid comprising a sensor electrode dispos d within a microchannel and means for measuring an aggregate current passed by said electrode in use to give an indication of said amount of analyte in the sample. [0053]
  • The invention also extends to an equivalent arrangement using a non-electrochemical sensing means—e.g. a calorimetric one. [0054]
  • Any suitable transfer means for transferring the fluid from the user's body to the device may be employed. Preferably methods such as suction, ultra-sound or iontophoresis may be used. More preferably however the transfer means comprises a needle. In particularly preferred embodiments the needle is a microneedle as defined hereinabove. [0055]
  • The needle is preferably shaped to aid skin penetration. For example the tip region of the needle is preferably substantially conical. Furthermore it is preferred that the tip region has a reduced cross-section—preferably less than 0.2 mm in width, most preferably less than 0.05 mm in width. [0056]
  • Moreover the needle is preferably arranged to minimise the risk of blockage upon insertion into skin. For example the aperture of the needle may be provided on a side surface of the needle, rather than at the tip as is conventional. Preferably the aperture of the needle is recessed, thereby avoiding contact with the skin upon penetration and thus potential blocking and/or damage [0057]
  • The needle preferably has a bore such that the sample fluid is drawn up by capillary action. Suitable needle bore sizes range preferably from 21-30 most preferably 25. Any suitable inert and biocompatible material for the needle may be employed. [0058]
  • Examples of such inert materials include but are not limited to stainless steel, gold, platinum and metal-coated plastics [0059]
  • Most preferably one or more microneedles is employed as defined hereinabove. [0060]
  • The methods above may be supplemented by applying pressure to the user's skin around the site at which it is penetrated. Such pressure could be applied purely manually, but preferably the device comprises means—e.g. suitably configured resilient means—to apply the pressure. The device may have skin pressurising means as explained in more detail below and as shown in the figures. Examples of skin pressurising means are set out in copending application US09/877,514 filed Jun. 8, 2001. [0061]
  • Preferably therefore the devices of the preferred embodiments comprise display means to display the concentration of the analyte being measured such as blood glucose. Such display means may be coupled directly to the measuring device, but preferably it is separate from the device and receives data therefrom by telemetry. This approach has the advantage that the measuring device can be very light and thus comfortable to wear. For example the measuring device may be worn under clothing but monitored on a display means kept, say, in a pocket or for example in the form of a watch worn on the arm of the user, without the user having to disturb their clothing in order to view it. [0062]
  • Additionally or alternatively the device comprises or is coupled to means for administering a substance to a user on the device on the basis of the measured concentration. Thus in the previous example of a blood glucose monitoring device, rather than just being a passive monitoring device, undoubtedly useful per se, such a device can be used in conjunction with an insulin pump to maintain the user's glucose level within a desired range. [0063]
  • The insulin pump could be a separate device or alternatively could be integrated within the analyte sensing device per se. Controlling means present for example within the meter could control the amount of insulin administered by the insulin pump in response to the level of glucose measured by the device. [0064]
  • By effectively providing a feedback loop, preferred embodiments of this inventive feature can allow a diabetic, to maintain control of his/her glucose levels with a minimum of intervention i.e. only to replace consumable items such as a sensor/insulin patch. [0065]
  • Furthermore, particularly where a continuous sensing means is employed, tighter control of, say glucose level, is achievable than where intermittent manual tests and insulin administration are used. [0066]
  • Thus when viewed from a yet further aspect the present invention provides an apparatus for administering a substance to a user comprising a measuring device for measuring the concentration of an analyte in a bodily fluid from said user, said measuring device comprising a plurality of analyte sensing means and at least one conduit, preferably a microchannel, for conveying said bodily fluid to at least one of the sensing means; the apparatus further comprising means to administer said substance to said user on the basis of said measurement of concentration. [0067]
  • In accordance with all appropriate aspects of the invention, the measuring device preferably comprises a means for attachment to the skin of a user, for example in the form of a self-adhesive patch. This can provide a secure but comfortable arrangement for use over prolonged periods of time, and can be relatively unobtrusive. [0068]
  • The means for administering the substance may be entirely separate from the measuring device or integrated therewith. Preferably such an integrated administering means comprises a reservoir on or in the measuring device for dispensing the substance. In a particular embodiment the substance, such as insulin, is contained within a reservoir on an adhesive patch. The actual means for getting the substance from such a reservoir could comprises anything suitable such as a pressurised supply in conjunction with a flow control means such as a valve. Preferably however a pump is used. In a preferred embodiment a single pump may be used both to administer the substance, such as insulin, to a user's body and also to draw out blood or preferably interstitial fluid, to a sensing means for making an analyte concentration measurement e.g. of glucose. [0069]
  • Thus, for example, a suitable device may comprise an adhesive patch comprising a microneedle (as defined herein) coupled to or in fluid communication with an array of microchannels and a separate needle for injecting insulin. In a preferred embodiment a single pump, e.g. a silicon micro-pump, may be used to inject insulin from a reservoir on the patch and to draw interstitial fluid over a glucose sensing means to a waste reservoir. [0070]
  • Where an embodiment of the invention calls for control and/or data processing means, these will generally comprise electronic means such as an integrated circuit or the like. A power supply is then also required. Preferably such control/processing means are portable. It or they may be provided in an integral package with the device e.g. the adhesive patch. Alternatively the control/processing means and/or power source may be provided separately and communicate with measuring device via a wire or wireless telemetry link as mentioned above. [0071]
  • The power source may be a battery or may be a ‘renewable’ source such as a solar cell or a dynamo energised by movement of the user. Of course a combination of these could be employed. [0072]
  • Measuring devices in accordance with the present invention may be fabricated using any suitable technique. In particular, where provided, the microchannels may be made using any suitable micro-fabrication technique such as but not limited to embossing, plasma etching or injection moulding [0073]
  • In one preferred embodiment, electrodes are provided on opposing sides of a fluid channel by forming a first channel which is filled with a conductive material, and forming a second channel for conveying the test fluid, the second channel cutting across the first thereby thereby forming two conductive portions within respective opposite sides of the second channel. [0074]
  • The conductive portions formed in accordance with the invention could be utilised for an electrochemical sensor arrangement. Micromachining techniques for making the abovementioned intersecting channels are preferred since they can be used to fabricate microchannels which can be formed close to one another, permitting dense arrays thereof. Furthermore, where the device has flow control means operating via electro-osmotic force, the driving electrodes are preferably positioned in close proximity to one another. This allows high electric fields to be achieved without applying unnecessarily high voltages. Preferably such driving electrodes are provided substantially on one side of a channel. In one embodiment the driving electrodes extend around the wall of the channel. [0075]
  • In a preferred variant of the method above, one or more electrodes may be formed on a second substrate which is then laminated to the main support member of the device. Methods used to deposit the electrodes onto the second substrate may be chosen preferably from a printing method, more preferably a screen-printing method. Alternatively, chemical or physical vapour deposition techniques could be employed. Generally speaking, the electrodes according to all embodiments of the invention may be formed of any suitable inert material such as carbon, gold, platinum, etc. According to one embodiment, carbon electrodes, optionally coated with reagents are provided on the second substrate by screen-printing, which is then laminated onto the support member thus closing the channel or channels and two gold electrodes are provided adjacent one another on a substrate laminated onto the support member for an electro-osmotic pump. [0076]
  • If a second substrate is provided, preferably it is arranged to close the channel provided on the support member. This allows a very straightforward fabrication method in which electrodes are formed within a closed channel. [0077]
  • Lamination of one substrate to another will normally be carried out such that both laminates are perfectly aligned and that no further trimming or cutting is necessary. However, the device could be fabricated for example by firstly a lamination step followed by a cutting step whereby the second substrate may be trimmed to the shape of the support member. Lamination may be carried out by various methods such as ultrasonic or thermal welding or bonding, or by the use of an adhesive. [0078]
  • According to one embodiment, the support member is formed with an integral needle at one end and the second substrate is then laminated onto the support forming a channel and leaving the penetration member exposed. According to another embodiment the integrated skin penetration member is provided is open on one side. The penetration member is arranged so that upon insertion into skin, the skin itself effectively forms a wall of the member to that it can act like a hollow needle. Most preferably this is achieved by forming the penetration member with walls tapering away from the open side—e.g. a V shape. Thus when viewed from a further aspect the invention provides an apparatus for obtaining and measuring fluid , comprising a skin penetration member having at least one longitudinal side open, the other sides being arranged so as effectively to cause the penetrated skin to act as the remaining longitudinal side of the member when the penetration member is inserted into the skin. [0079]
  • Thus when viewed from a yet further aspect the present invention provides a method of fabricating a device for measuring the concentration of an analyte in a fluid comprising providing a support member, forming an open channel on a surface of the support member and laminating a second layer onto said support member so as to close said channel. The invention also extends to a device fabricated using such a method. [0080]
  • Where an optical measurement technique is employed, as an alternative to an electrochemical measurement technique a light sensing means will, in general, be required. In some cases a light source may also be required, but is not always the case, for example in the case of chemiluminescent measurement. Any such light sensing means and/or the light source may be provided integrally with the non-disposable measuring device e.g. a test-meter. According to one embodiment it or they are provided separately of the part of the device which is brought into contact with the sample fluid—e.g. a skin patch. This means that the device itself can be made disposable while the relatively more expensive light sensing means and associated electronics for example could be provided in a separate test meter. [0081]
  • In preferred embodiments the test device comprises means for optimising the light transfer from the sensing means to the optically sensitive means. In a simple embodiment such means comprises a lens, e.g. integrally moulded as part of the support member for the test device. Additionally or alternatively the device may be arranged such that the light sensitive means views the sensing means along the conduit, e.g. microchannel, along which the sample fluid passes. In other words the conduit, preferably a microchannel, acts as a light pipe. [0082]
  • By measuring light transmission or reflectance along the microchannel rather than across it, the path length and therefore the optical density may be increased for a minimal sample volume. , thereby making its measurement easier and more accurate. The material from which the conduit is formed is preferably chosen so to maximise light throughput at the frequencies of interest. [0083]
  • It will be appreciated by those skilled in the art that the arrangement described above is beneficial in its own right in enhancing the signal that may be measured from a minimal sample volume and thus when viewed from a yet further aspect the present invention provides an apparatus for measuring the light from an assay comprising an elongate conduit portion along which a sample fluid is drawn in use and a light sensitive means arranged to be sensitive to light coming substantially from the longitudinal axis of said conduit portion. [0084]
  • In one particularly preferred embodiment a disposable skin patch is provided with a moulded plastics lens over the analyte sensing means. A corresponding test meter is designed to be placed over the patch and comprises a light sensitive element which sits over the lens when the meter is placed over the patch.[0085]
  • III. BRIEF DESCRIPTION OF THE DRAWINGS
  • Certain preferred embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which: [0086]
  • FIG. 1 shows a first embodiment of the invention, in the form of a skin patch, in cross section; [0087]
  • FIG. 2[0088] a shows an alternative microchannel arrangement;
  • FIG. 2[0089] b shows a multiple channel/sensor arrangement;
  • FIG. 3 depicts a cross section view of the skin patch of FIGS. [0090] 1, and 2 attached to the skin of the user with a controller unit attached to the skin patch;
  • FIG. 4 depicts a display unit; [0091]
  • FIG. 5 depicts another embodiment of the invention, showing schematically a skin patch integrated with a needle, which also acts as an electrode, in cross section; [0092]
  • FIG. 6[0093] a depicts a microchannel and optochemical sensor in plan view;
  • FIG. 6[0094] b depicts a microchannel and electrochemical sensor in plan view;
  • FIGS. 6[0095] c to e are cross sections of the microchannel of FIG. 6b with fluid progressively entering the channel;
  • FIG. 8[0096] a shows a further embodiment of the invention, in the form of a single-use device with an integrated puncturing means;
  • FIG. 8[0097] b is a cross section through a user's skin having the device of FIG. 8a therein;
  • FIGS. 8[0098] c and 8 d depict the construction of a device similar to that in FIG. 8a;
  • FIG. 8[0099] e is an alternative embodiment, shown in perspective view, of a puncturing means;
  • FIG. 8[0100] f is a still further embodiment of an alternative puncturing means shown in perspective view;
  • FIG. 8[0101] g is a side-sectional view of the embodiment of FIG. 8f taken along line X-X in FIG. 8f;
  • FIG. 8[0102] h is a cross-sectional view of the lance of FIG. 8e in tissue;
  • FIG. 8[0103] i shows an integrally formed base member and lance showing a vent and a capillary sensing channel, but with upper laminate removed for clarity;
  • FIG. 12[0104] a is a perspective view of a microchannel,
  • FIG. 12[0105] b is a close-up, partial, perspective view of a microchannel; whereby electrodes are provided on opposing sides of a fluid channel by forming a first channel which is filled with a conductive material, and forming a second channel for conveying the test fluid, the second channel cutting across the first thereby thereby forming two conductive portions within respective opposite sides of the second channel.
  • FIG. 17[0106] a is top view, taken in perspective, of a first preferred embodiment of a chip for extracting and distributing a fluid sample and having a meander shaped waste reservoir;
  • FIG. 17[0107] b is the view of the embodiment of FIG. 17a modified to illustrate a column shaped waste reservoir; FIG. 18 is a bottom view, taken in perspective, of the chip of FIG. 17a;
  • FIG. 19 is a plan view of a measurement channel of the chip of FIG. 17[0108] a;
  • FIG. 20[0109] a is a plan view of the meander shaped waste reservoir of the embodiment of FIG. 17a;
  • FIG. 20[0110] b is a plan view of the column shaped waste reservoir of the embodiment of FIG. 17b; and
  • FIG. 21 is a plan view of the switching mechanism shown in FIG. 20[0111] a.
  • IV. Detailed Description of the Drawings
  • A. Skin Patch—General Description [0112]
  • Turning to FIG. 1 there is shown a [0113] skin patch 2 suitable for measuring the level of blood glucose in a user. Patch 2 is made up of two layers 3 a and 3 b
  • The [0114] lowermost layer 3 a is made of an suitable microfabricated plastic such as polyester, polycarbonate, polystyrene, polyimide, or other suitable microfabricatable polymers of suitable dimensions to allow it to be worn comfortably for a prolonged period of time, and optionally has an adhesive on its underside to allow the patch to be securely attached to the skin of a user. An optional pressure ring (5) is designed to apply pressure to the surface of the skin to enhance the flow of fluid from the body of the patient into the device. The pressure means may also be integrally formed and of the same material as that of 3 a. The drawing is not to scale and thus the various features may be of a different relative thickness dimension than illustrated. It is understood that FIG. 1 is shown for illustrative purposes only and as such the underside of 3 a may be of any shape that would facilitate fixing of the device to the skin, for example when the pressure means is incorporated. The invention is not limited as such to a pressure ring and other types of pressure extraction designs could be used. A penetration device (4) e.g. a needle, lancet or cannula is attached to the lowermost layer 3 a, through which fluid passes into the collection and fluid collection and distribution port (7) formed in the upper surface of layer 3 a. Layer 3 a has on its upper surface microfabricated channels. Port (7) is also formed by the same microfabrication process as the microchannels.
  • Laminated to the lowermost layer is a [0115] substrate layer 3 b, preferably formed of the same material as that of the lowermost layer. This serves to close the microchannel. The microchannel and penetration member may optionally be coated with a hydrophilic material and/or an anti-coagulant such as a heparin attached to the inner surface such that during use it will not diffuse away. Also shown is the microchannel system 8, corresponding electrochemical detectors 11 and optionally the electro-osmotic pump systems 10 and the hydrophobic gates 12 Each of the electrochemical detectors 12 and electro-osmotic pump systems 10 are electrically connected via conductive tracks (not shown) to respective terminals (not shown) at the edge of the patch. Not shown in FIG. 1 are the fluid reservoirs. FIG. 2a shows another embodiment whereby hydrophobic gates are present on either side of the sensor.
  • With respect to FIG. 3, a [0116] controller unit 102 is brought into contact with these terminals so as to make electrical contact in use in order to transmit the measurement output signals between the patch and a display unit 103 (see FIGS. 3 and 4).
  • A [0117] control unit 102 for the patch 2 is shown in FIG. 3. As may be seen, this sits on top of the patch 2 and is secured to upper side of the patch in a suitable manner(not shown). The control unit serves to control the fluid pumping mechanism, hydrophobic gates, fluid switching means and analyte sensors. The control unit is also provided with means such that radio frequency communication may be made, for example with the meter, for transmission and receipt of data. The control unit would also determine when all the microchannel/sensors had been used and transmit a signal accordingly. The control unit would also have means to detect any malfunctioning of the device and to also transmit this information.
  • The [0118] control unit 102 is preferably battery operated and is capable of transmitting signals to a wireless display unit (FIG. 4) for example a radio frequency communication.
  • FIG. 2[0119] b shows a multichannel arrangement with the proximal end of the needle 4 is in fluid communication with a fluid collection and distribution port (7) formed in the substrate layer 3 b of the patch. Radiating out from the manifold 6 are eighteen of the microchannel systems 8. Not shown is the fluid switching means.
  • B. Micro-Channel System with Flow Control [0120]
  • One [0121] such microchannel system 8 is shown in greater detail in FIG. 6b. The microchannel 608 is in direct communication with the port 607 into which the fluid flows from the needle 4. Downstream of the port 607 is an electrode system comprising a pair of inert electrodes 610 providing electrosmotic flow. The electrodes are formed on a second substrate layer 3 b (omitted from this figure for clarity). The second substrate layer is then laminated onto the first substrate layer 3 b thereby closing the microchannel 126 and bringing the electrodes 610 into contact with it. The electrodes 610 are positioned adjacent to each other, together forming an electro-osmotic pump system. By applying a voltage difference across the electrodes, an electric field is generated which drives fluid along the microchannel 608.
  • Positioned along the [0122] microchannel 608 is one or more hydrophobic gates 612 which prevents the flow of fluid by capillary action along the microchannel. Downstream of the hydrophobic gate 128 is an electrochemical sensor 611 comprising at least two electrodes also formed on the upper substrate layer 3 b. At least one further hydrophobic gate similar to the first, is optionally provided downstream of the sensor 12. This serves to stop the flow of fluid past the electrodes to allow the possibility for an end-point detection of the analyte. It will be understood by those skilled in the art that the hydrophobic gates may be constructed of any suitable material, including, but not limited to, PTFE, polycarbonate, polyisobutelene, PMMA, dodecyl acetate, silicon rubber, synthetic way, octadocyl mercaptane, dodecyl mercaptane, and/or octa decyltrichloro silane.
  • C. Skin Patch Operation [0123]
  • Operation of the [0124] skin patch 2 will now be described. The patch is attached to the skin of a user causing the needle 4 to penetrate substantially into the cutaneous layer of skin. Cutaneous fluid is drawn up the needle 4 and into the port 7 of the device. Referring now to FIG. 6c it will be seen that the fluid 136 is drawn into the microchannel 126 as far as the hydrophobic gate 128 where its flow is arrested. When a measurement is required, the controller unit 102 issues an appropriate signal to the electro-osmotic pump 610, in the form of a voltage difference across the two electrodes. This causes the fluid 136 to flow through the hydrophobic gate 128 and past the analyte sensor 611 until it reaches the second (optional) gate . Once the interstitial fluid 136 comes into contact with the sensor 12, a measurement is performed by the analyte sensors.
  • The [0125] controller unit 102 is provided with control means or means to initiate the flow of interstitial fluid sequentially to each of the microchannels (8) after a predetermined period of time. Once all the tests on the patch 2 have been performed, the controller 102 transmits a signal to the display means 103 to alert the user so that the patch 2 can be discarded and a fresh one applied.
  • D. Alternative Embodiment with Optochemical Sensing [0126]
  • An alternative form of microchannel [0127] 126 is shown in FIG. 6a. This is similar to that shown in FIG. 6b except that the electrochemical sensor 611 is replaced by an optochemical one 615. The optical sensor comprises a reaction chamber 616 which for example contains Glucose oxidase (GOD) Horseradish Peroxidase (POD) and a leuco-dye, (a colourless precursor of the dye molecule). (e.g. 2,2-Azino-di-[3-ethylbenzthiazoline-sulfonate] The optical system is not limited to the above example and could comprise any suitable enzyme-dye combinations. The reaction which takes place is as below:
  • It will be seen from the above that the dye changes [0128]
    Figure US20040096959A1-20040520-C00001
  • colour in accordance with the amount of glucose in the sample. In order to measure this, the chamber [0129] 129 has an optically transparent upper surface. This arranged is to be aligned with the tip of an optical fibre in a modified control unit (not shown) so that the fibre is approximately 2 to 3 mm above the dye spot. The other end of the fibre is in optical contact with a light source and light sensitive diode sensor which is sensitive to a particular wavelength of light (for example 438 nm in the case of ABTS) emitted by the transformed dye. The degree of absorption therefore gives a measure of the amount of transformed dye and thus the amount of glucose present.
  • As illustrated above, glucose present in the fluid acts as a substrate for GOD, which breaks the glucose down into glucono-1,5-lactone and hydrogen peroxide. POD subsequently catalyses the oxidation of the leuco-dye using the hydrogen peroxide, resulting in the production of a coloured dye which is subsequently detected. Those skilled in the art will understand that instead of 2,2-Azino-di-[3-ethylbenzthiazoline-sulfonate], any suitable leuco-dye may be used, e.g. Tetramethylbenzidine-Hydrochloride, or 3-Methyl-2-Benzothiazoline-Hydrazone in conjunction with 3-Dimethylamino-Benzoicacide. [0130]
  • The microchannels described as hereinbefore use electrochemical or colorimetric means to detect glucose. The skilled person would understand that other detection means, such as infra red detection, filter photometry or Kromoscopy may be used. [0131]
  • F. Electrode Penetration Member [0132]
  • FIG. 5 shows schematically a further preferred embodiment of the invention. similar construction to that of the previous embodiments and thus it has a hollow needle [0133] 106, for example but not limited to 1.4 mm long and 0.3 mm wide which penetrates substantially the cutaneous layer of the skin 113 of the user.
  • In this embodiment however the needle [0134] 106 also acts as an electrode which serves to extract fluid from the skin. At least one electrode 108 is provided such it makes contact with the skin. As shown in FIG. 5, the needle is poised at a positive potential. By applying a voltage difference across the electrodes 106 and 108 an electric field is generated along the needle 106 and manifold 111 which stimulates the skin and increases the perfusion of interstitial fluid out of the skin.
  • G. Alternative Penetration Member Construction [0135]
  • FIGS. 8[0136] a to 8 d show two further embodiments of the invention. In contrast with the foregoing embodiments, these are both single-use strips suitable for measuring blood glucose of a user. They are therefore used in a similar way to conventional test strips. However a principle difference is that each has an integrated lance 119 at one end.
  • Considering the [0137] device 115 shown in FIG. 8a, it will be seen that it is made essentially of a layer 116 onto which a second layer is attached or laminated (not shown). The lowermost substrate layer 116 comprises a moulded or stamped microchannel 118, as well as the integrally formed lance 119 arranged in close proximity with the entrance 103 of the microchannel. During manufacture, the microchannel 118 maybe coated with suitable reagents, such as glucose oxidase in the case of glucose detection, which can be applied by any conventional means, such as printing for example screen-printing or ink-jet printing, or spray coating during manufacture. Alternatively, the microchannel may be free of enzyme, the reagents being provided on the electrode system (121) located on the underside of the uppermost layer (117).
  • The [0138] uppermost layer 117 may also be a conventional biosensor test-strip which could be attached to the lower surface such that the electrodes are positioned on the underside of the formed channel. This particular electrode system 121 comprises three electrodes 221 of which at least one is covered with layers of enzyme and electron mediator such as glucose oxidase and ferricyanide to form a working electrode for detecting glucose, as is well known in the art, the other two being a counter and reference electrode. The electrode system may comprise two working electrodes which serve to compare currents at each and measure the channel filling speed of the blood or interstitial fluid. Alternatively the electrode system could comprise just two electrodes, a working and counter/reference. Not shown in FIGS. 1-21 is a venting device such that air may be displaced upon uptake of fluid into the microchannel. A vent or vents may be provided at any convenient location. Corresponding tracks 321 allow electrical connection to be made to the electrodes at the distal end of the strip when it has been inserted into a suitable test meter. The upper layer 117 may be slightly longer than the lower one 116 to allow access to the tracks 321 for this purpose.
  • It will be noticed in particular that the [0139] lance 119 of the strip 115 in FIG. 8a is essentially V shaped in cross section and tapers towards its tip. This means that when it is used to puncture a user's skin 123, as is shown in FIG. 8b, the two sides of the V force back a portion of the skin 123, forcing the epidermis to form the remaining wall 123 of an enclosed channel 124. Thus an open channel is effectively transformed into a closed one when it is inserted into skin. This allows fluid to be drawn up the channel 124 so formed and into the microchannel 118, without having to mould a very fine hollow needle. The microchannel 118 may also be formed with a V shaped profile for convenience of fabrication, but this is not essential as may be seen from the slightly modified embodiment of FIGS. 8c and 8 d in which the microchannel 118′ has a rectangular profile.
  • In the use of the [0140] strip 115, the user pierces their skin with the lance 119 and interstitial fluid or blood is made to flow, by means of capillary action, through channel 124 formed by the lance (119) and the skin 122, into the microchannel 118 and thus over the electrochemical detector 121.
  • The user then withdraws the [0141] strip 115 and inserts the opposite end into a conventional style test meter which makes electrical connection to the three conductive tracks 321. Preferably however, the meter is an integral part of the lancing system such that the user does not need to insert the strip into the meter and is automatically provided with the measurement result.
  • FIGS. 8[0142] e through 8 h show alternative embodiments of lances for penetrating into a body-fluid laden layer of skin as an alternative to the embodiment of the lance 119 of FIGS. 8a and 8 b. In FIG. 8e, the lance 119 a is an integrally formed pointed protrusion from the device 115 (not shown in FIGS. 8e but identical to that in Fog. 8 a) with a longitudinal capillary channel 121 a cut completely through the thickness of the lance 119 a. At a pointed distal tip 125 a of the lance 119 a, the lance 119 a is provided with an enlarged area 123 a of the channel 121 a. The enlarged area 123 a also is cut completely through the thickness of the lance 119 a. At its proximal end 127 a, the capillary channel connects with the microchannel 118 of the device 115 of FIG. 8a.
  • As shown best in FIG. 8[0143] h, the embodiment of FIG. 8e permits fluid to enter into the capillary channel 121 a from opposite sides of the lance 119 a and with the wall of the skin cooperating with the walls of the lance 119 a to define an enclosed channel 121 a. Fluid then can accumulate in the pooling area 123 a and flow from the pooling area 123 a into the capillary channel 121 a as well as flow directly from the skin into the capillary channel 121 a for passage to the microchannel 118.
  • In the embodiment of FIG. 8[0144] f, a lance 119 b is of a design similar to that of FIG. 8e is shown but excluding the large pooling area 123 a. Elimination of the pooling area 123 a permits a narrower transverse dimension to the lance 119 b.
  • In addition to fabricating the device from molded parts, the [0145] base member 116 and lances 119, 119 a, 119 b can be stamped from electrically conductive material. In such cases, the base member may be an electrode. An electrically conductive base member and lance can be stamped from metal as described or formed in any other acceptable manner (e.g., photochemically etching a metal stock material, machining or other fabricating technique). While the electrically conductive base member can be made of stainless steel it can be also be plated with a second metal such as for example gold platinum or silver. The electrically conductive base material may also be used as a counter electrode.
  • FIG. 8[0146] i shows an integrally formed base member and lance stamped from preferably one piece of sheet metal. The metal is preferably, but not limited to, stainless steel optionally coated with a noble metal such as gold or silver. Also shown on the base sheet is a microchannel 84 onto which a second layer such as a test-strip could be attached. It is intended that such a device as illustrated in FIG. 8i would be incorporated into a lancet firing device such that the device could be fired into the skin. Furthermore the individual devices may be loaded and stored in a cassette comprising individually sealed pouches. Such a cassette could also be stored within the lancet firing device.
  • The stamped penetration member with a [0147] rectangular vent 81 which also serves as a capillary break ensuring that once fluid is taken up by the lance 83 into the sensing zone 82, the flow of fluid is halted. The vent may be of any suitable size or shape.
  • J. Detailed Preferred Embodiment [0148]
  • 1. Sampling Module [0149]
  • With reference now to FIGS. 17[0150] a-21, the present invention will now be described with reference to a most preferred embodiment of the invention in an ex vivo continuous monitoring system.
  • The ex vivo continuous monitoring system consists of several major subsystems including sample extraction, sample fluid distribution, and electrochemical detection. As will be more fully described below, a body fluid sample can be extracted from the skin and guided into a channel for the electrochemical determination of glucose concentration. [0151]
  • After a predetermined period, the body fluid is directed into a different, previously unused channel. This process avoids false results otherwise arising from fouled electrodes or denaturant enzymes. Since the channels into which the fluid is re-directed are not filled with a sample solution or any other liquid, the electrochemical system in the channel will not show aging effects. [0152]
  • The disposable portion of the ex vivo continuous monitoring system is referred to herein as a chip. FIGS. 17[0153] a, 17 b show embodiments of such a chip 400, 400 a. In the embodiments of FIGS. 17a, 17 b, each chip 400, 400 a has for example, but not limited to, twelve measurement channels 402, 402 a with switching mechanism 404 and 404 a and waste reservoirs 406, 406 a. Differences in the embodiments of chips 400, 400 a will be described below with initial description being limited to a discussion of chip 400. It will be appreciated that chip 400 a is identical to chip 400 except as will be described. Similarly elements are numbered similarly with the addition of an “a” to distinguish embodiments.
  • The [0154] chip 400 has an edge connector 401 for electrically connecting electrodes (as will be described) to a controller (not shown). A controller can contain logic, memory and processors for controlling the electronics of the chip 400 and optionally displaying any outputs (as, for example, the function and operation of controller 102 in FIG. 3).
  • Preferably the measurement results are transmitted by radio frequency by the controller to a remote control allowing the user to view the result and optionally to communicate or interact with the controller of the monitoring system. [0155]
  • The [0156] sampling chip 400 extracts body fluid from the skin. In the preferred embodiment, the chip 400 extracts interstitial fluid (ISF) from substantially the cutaneous layer of a patient. With reference to FIG. 18, the chip 400 includes a suitable cannula or needle 410, a spring-loaded hub 412 to pressurize the skin and means such as an adhesive 414 to fix the chip 400 to the skin. Sampling modules with needles and spring-loaded hubs are shown in U.S. Pat. Nos. 6,203,504 and 5,746,217. It will be appreciated the foregoing description is a preferred embodiment. Any technique for obtaining a sample of body fluid may be used in combination with the teachings of the present invention.
  • Body fluid enters the [0157] needle 410 due to the pressure applied by the hub 412 and travels in to the micro-channels 402 as described above with reference to FIGS. 1a, 1 b and 2. The needle 410 discharges the body fluid into a common distribution depression 416 shown best in FIG. 19). The distribution depression 416 is in fluid flow with the micro-channels 402. In the embodiment shown (having 12 channels of the dimensions described, the shape and the volume to the distribution depression 416 is preferably a disk shaped void with 1 mm diameter and 100 μm depth. These dimensions and shape may vary depending upon the size, number and flow rate of individual channels. Not shown in the drawings, a portion of the micro-channel 402 between the distribution depression 416 and a ground or reference electrode 420 may be restricted in size to reduce flow rate variability and therefore control the rate of flow.
  • Means may be provided within the device for the removal of undesirable gas-bubbles from the fluid sample. Such means could comprise a filter positioned between the needle and the common reservoir. [0158]
  • 2. Continuous Electrochemical Detection of Glucose [0159]
  • The electrochemical detection system consists of an electrode system shown best in FIG. 19. The electrode system includes at least one working electrode [0160] 418 (by way of non-limiting example, gold or carbon) and a reference electrode 420 (e.g., silver/silver-chloride). The reference electrode 420 is circular to serve as a common electrode for each channel 402, thus reducing the number of contacts necessary. Alternatively, each channel can be provided with a unique reference electrode. Each channel 402 has a unique dedicated working electrode 418. In addition, a counter electrode (not shown) may be added. The electrodes 418, 420 are disposed to contact fluid in the channel 402. As previously described, the channels 402 are formed as open channels in a substrate layer. The electrodes 420, 418 are screen-printed on an overlying laminate layer which also serves to seal the channels 402. The working electrode material is dependent on the enzyme ink being used. For example, one can distinguish between a redox-mediated system for the carbon working electrodes and an oxygen mediated system for the gold or platinum electrodes.
  • While a specific electro-chemical system will now be described, it will be appreciated that such description is illustrative and any suitable system could be used. [0161]
  • In the case of the redox-system, an organo-metal-complex (which is linked to polymers forming the ink body) acts as a conductor and electron acceptor for the enzyme. The electrons are transported by the redox-mediator directly or by an electron hopping mechanism from redox-center to redox-center to the working electrode. At the working electrode, the mediator is finally recycled to its original redox-state before it can react with the enzyme protein in a new cycle. The following are suitable for this detection method: glucose oxidase from [0162] aspergillus niger (GOD EC 1.1.3.4) and PQQ dependent glucose dehydrogenase (GDH EC 1.1.99.17).
  • The enzyme ink is a cross-linked hydrophilic gel allowing the penetration of sample fluid but restricting the movement of the enzyme thus it is fixed to the electrode. This is an important property of the enzyme ink because the concentration of the enzyme has an effect upon the total response of the sensor. The same effect can be observed with the redox-mediator, due to the small molecular weight it cannot be entrapped in the same way as enzymes. Therefore, in the preferred embodiment, it is preferred to link the redox-mediator molecule to the large molecules such as the enzymes, proteins, or to the polymers of the ink material directly. In case of oxygen-mediated systems the situation is simpler. The enzyme ink needs only to contain enzyme as active component, the oxygen itself is dissolved in the sample fluid and is transferred to the sensor from the sample stream in the same instance as glucose. [0163]
  • In case of glucose determination the oxygen-mediated system can be created with GOD based on the ability of the enzyme to build hydrogen peroxide from oxygen and glucose. [0164]
  • Oxygen-mediated: [0165]
    Figure US20040096959A1-20040520-C00002
  • Redox-mediated: [0166]
    Figure US20040096959A1-20040520-C00003
  • Ox=oxidized mediator species e.g. K[0167] 3[Fe(CN)6], p-benzoquinon, Ferrocinium
  • Red=reduced mediator species e.g. K[0168] 4[Fe(CN)6], hydroquinone, Ferrocene
  • Hydrogen peroxide is a very reactive molecule, which can function as mediator to transport electrons for the enzyme to the electrode surface. [0169]
  • Oxidation of hydrogen peroxide on gold: [0170]
    Figure US20040096959A1-20040520-C00004
  • Reduction of hydrogen peroxide on gold: [0171]
    Figure US20040096959A1-20040520-C00005
  • Normally only the oxidation of hydrogen peroxide is used for analytical purposes due to the possibility of direct oxygen reduction on negative polarized noble metal electrode during the reduction of hydrogen peroxide. However, the reduction of hydrogen peroxide would open the possibility to use more cost effective electrode materials such as silver instead of gold, platinum, or palladium. In comparison to the noble metal electrodes we need for the oxidation or reduction of hydrogen peroxide carbon electrodes can be used for the oxidation of the redox-mediator. [0172]
    Figure US20040096959A1-20040520-C00006
  • In the preferred embodiment, the electrodes are deposited on a film such as polystyrene or polycarbonate of about 10-200 μm and, more preferably, about 30 to 75 μm) using screen-printing technology. Subsequently to this print step the working electrode is coated with ink containing enzyme and in the case of carbon working electrodes with an ink containing enzyme and mediator. [0173]
  • This coating step could be accomplished with the same printing methods as used for the electrode material. Thus the production could be done in one machine with different print heads or stations on a continuous web. Such a process is described in “Continuous Process for Manufacture of Disposable Electrochemical Sensor”, U.S. patent application Ser. No. 09/537599. [0174]
  • 3. Fluidic Elements of Ex Vivo Continuous Monitoring [0175]
  • A schematic diagram of one [0176] measurement channel 402 is shown in FIG. 19. The channel 402 extents from the needle 410 and distribution depression 416 and through the main channel 402 (of dimensions for example of 200 μm×100 μm) containing the electrodes 418, 420.
  • As previously described, a flow restricted portion of the [0177] channel 402 namely a small cross section (e.g., 30 μm×30 μm) may be provided between the distribution depression 416 and the common electrode 420. Such a flow restriction levels out different flow rates during the extraction of the body fluid. These flow rate differences are caused due to the changing physiological conditions during the extraction. In general, one could observe a higher flow rate at the beginning of a sampling period compared to the extraction rate at the end. A thin capillary can counter-act this behavior.
  • The [0178] electrodes 418, 420 are not part of the injection molded base plate of the chip 400. Instead, they are placed on top of the open U-shaped or rectangular channel 402 of the base plate of the chip 400 in a separate lamination step.
  • Extending from the [0179] measurement channel 402 is the waste reservoir 406. The waste reservoir 406 stores the sample solution after its evaluation by the electrochemical sensing in channel 402. The size of the waste reservoir 406 defines the amount of time one channel can theoretically be used. After the reservoir 406 is filled, the controller can activate the next channel to continue with the detection of glucose in the body fluid of a patient.
  • It is important that the [0180] reservoir 406 is large enough to support more then a two-hour measurement. Thus, a chip 400 with twelve channels 402 can run for 24 to 28 hours allowing the patient a convenient change to a new chip (e.g. during his daily morning routines). However, as will be appreciated by those skilled in the art, reservoirs 406 larger then 5 μL (which is enough to support the flow for more then two hours with a flow rate of 30 nL/min) could allow longer runtimes. Thus, the entire chip 400 could last for more than one day. The number of channels in a device is not limited and may vary depending upon the measurement technique, the length of monitoring period and the size of the device and could exceed 100.
  • FIGS. 20[0181] a, 20 b show two different representative embodiments of the waste reservoir 406, 406 a. Waste reservoir 406 is a meander-shaped extension of the channel 402. While easy to manufacture, such a design can build up high back pressure in the system, due to the weaker capillary force, then the design of waste reservoir 406 a and is not as space efficient.
  • The column filled [0182] reservoir 406 a has advantages compared to the meander-shaped reservoir 406 regarding the size and the integration into a 12-channel chip 400 a. It could be deeper than the reservoir 406 while producing a higher capillary force to take up the extracted and evaluated sample fluid from channel 402 a. In principle, waste channel 406 a resembles a plurality of capillaries with a cross-section for example of 400 μm×400 μm compared to only one-capillary with the same cross-section in the design of waste reservoir 406. The shape of the columns is not limited to simple squares. They could be formed as circles, pentagons, hexagons, octagons or the like. Concerning the flow characteristics inside a column field the hexagon shaped columns shown are the most preferred version. The size and geometry of the channels and reservoirs may vary.
  • The base plate of the [0183] chip 400 can be produced in a molding process, which is optimized for the small features and structures. A wide variation of plastics can be used for the base plate of the chip 400 (e.g. polystyrene, polycarbonate, polymethymethacrylate, polyester, and others). Preferred polymers are polycarbonates. These allow a subsequent laser finishing to generate a secondary micro- or nano-structure (e.g., any desired patterns or other finishing can be formed in the micro-channel). Polystyrene shows preferable characteristics in the lamination process. Thus polycarbonate could be used as the lower laminate and polystyrene used as the upper.
  • The [0184] chip 400 itself consists of three major part a) the chip base plate with all the fluidic elements described above, b) the electrochemical detection system screen printed on a polymer foil, and c) the sampling hub with extraction needle. These elements are described in the foregoing sections.
  • Normal lamination processes use foils coated with a pressure sensitive or hot melt adhesive to join a foil to a substrate or another foil. Such a standard process may present problems in conjunction with the described device. First, foil is needed which is suitable for the printing process. This is difficult with any pressure sensitive adhesive due to problems within the printing equipment. Such problems can be addressed with a foil coated with a hot melt adhesive, where the adhesive becomes tacky only at an elevated temperature (e.g. 80° C.). The deposition of ink to print the electrodes and other structures is quite easy with this system but it can present problems during the lamination step. The glue layer becomes substantially liquid at elevated temperatures with the consequence that the printed structure looses shape and gets stretched and deformed. Such deformation is not only a cosmetic problem for an electrode, it changes the electrode surface (which is directly proportional to the response signal) as well as the internal resistance of the material and the electro-catalytic properties. [0185]
  • Apart form the foregoing problems, there is the additional problem of glue entering and clogging or misshaping the channel. For the chip described above, the most advantageous process is an adhesive-free thermal bonding process of the pre-printed foil to the chip base plate. The bonding happens at an elevated temperature with a stamping tool or a hot roller press. The temperature is close to the glass transition temperature (T[0186] g) of the polymer thus the low molecular weight portion of the polymer will become mobile and tacky while the high molecular weight portion of the polymer still supports the integrity of the foil or film. The low molecular weight portion of the polymer will bond both pieces (base plate and foil with electrodes) together, additionally it will follow the shape of the printed electrodes, which can be between 5 and 30 μm thick. Therefore, one does not see a leakage between base plates and printed areas. Ideal bonding is achieved with the same thermoplastic polymers such as polystyrene on polystyrene or polycarbonate on polycarbonate. However, with the right regime and temperature/pressure combination polycarbonate can be bonded on polystyrene as well. But duro-plastic (non thermoplastic) materials are not suitable for such a process.
  • 4. Channel Switching Mechanism [0187]
  • The [0188] switching mechanism 404 allows the replacement of a used electrochemical system after a predetermined period of time. Generally, an electrochemical system is prone to fouling due to precipitation or adsorption of proteins or other species on the electrode surface.
  • In the past, many different systems have been developed to overcome this problem. A classical example for such a system is the mercury-drop-electrode, where the mercury provides the electrode surface but every second the drop of mercury is replaced. Thus, the system never undergoes a continuous fouling process of a solid-state electrode. The renewal of the electrode surface is the most efficient but also the most dramatic strategy to avoid fouling. However, this same concept is used with all current disposable diagnostic glucose strips, where the test strip is disposed after a relatively short working time (5 to 15 seconds depending on the device). [0189]
  • A different strategy is the protection of the electrode by a semi permeable membrane, which allows the analyte to pass through to the electrode but not a large protein (or a red blood cell). This concept is adopted in classical oxygen electrodes. [0190]
  • The [0191] chip 400 uses a mixture of both concepts: a plurality of electrodes in diff rent channels as well as an electrode protected by screen printable membrane (see German patent DE10052066.9 and related International patent application PCT/EP01/12073). This allows the sensor electrodes to operate for several hours before the fouling shows a significant effect on the results and before the controller is switching to the next channel.
  • FIG. 21 shows a schematic diagram of the [0192] switching mechanism 404. At the beginning of a measurement, all channels 402 are filled with air and the entrance of fluid into the channel 402 from the distribution depression 416 is blocked due to the gas back pressure. The switching system 404 includes electrodes 422 separate from the electrochemical detector electrodes 418, 420. The switching electrodes 404 allow local heating of a very small area on the thin foil such as polystyrene 424 overlying a well 426. The well 426 is in fluid flow communication with the end of the reservoir 406 except that the fluid flow is normally blocked by the foil 424. Due to this blockage, air cannot escape from the channel 402 and fluid from the distribution depression 416 cannot flow into the channel 402. Upon heating of the foil, this blockage is removed thus allowing the fluid to enter the channel.
  • The temperature at the center point of the overlying electrodes [0193] 422 (i.e., overlying the foil 424 above the well 426) very quickly rises over the glass transition temperature (Tg) of the foil in response to an application of a small current in the range of some {fraction (1/1000)} Ampere with the effect that the foil 424 forms an opening above the hydrophobic well 426 allowing air in the channel 402 and reservoir 406 to vent into the well 426. In this event, the gas pressure in the channel 402 is relieved and fluid can flow from the distribution depression 416 and into the channel 402.
  • The hydrophobicity of the well [0194] 426 prevents the sample fluid from flowing into the well 426 and leaking out of an opening formed in the film by reason of the energized electrodes 404. After the waste reservoir 406 is filled completely, the controller opens a subsequent channel 402 by energizing its switching electrodes 422 to permit air to escape from the channel 402 and for the subsequent channel 402 to fill with body fluid. It should be appreciated that other methods for switching between channels and controlling fluid flow could be used and the invention is not limited by the above method
  • 5. Flow Rate Detection [0195]
  • To assure a safe operation, it is preferable the controller determine if the [0196] waste reservoir 406 is filled, is still filling at a constant rate, or if the needle 410 has dislodged from the cutaneous layer of the patient and the continuous sample stream has stopped. To achieve this, the waste reservoir 406 can be equipped with two electrodes (not shown) at the top and the bottom of the reservoir. Not in electrical contact with the sample fluid, these electrodes could measure the change in capacitance while the air inside the structure is slowly exchanged with sample fluid. The rate of the capacitance change will be directly proportional to the flow rate of the sample fluid and allow a close monitoring of the ongoing extraction.
  • 6. Semi-Continuous Monitoring Alternative [0197]
  • An alteration of the foregoing is the scheduled measurement of discrete glucose values. With this embodiment the waste reservoir is just large enough to replace the dead volume of the needle and sampling module but instead of for example twelve channels the chip contains a higher number of channels (e.g. 72 or 144 channels). These structures would support a 12-hour or 24-hour measurement cycle with a discrete glucose test very 10 minutes. An advantage of the semi-continuous method would be that it would not be necessary to use a cross-linked hydrogel due to the fact that migration of the reagents into the fluid sample over time would no longer an issue. Consequently, conventional enzyme inks such as disclosed in U.S. Pat. No. 5,708,247 could be used. [0198]
  • It will be appreciated by those skilled in the art that whilst some of the potential embodiments of the inventive concepts disclosed herein have been described in greater detail, there are many different variations and modifications to these possible. For example, devices in accordance with the invention may measure the concentration of analytes other than those in bodily fluids. [0199]

Claims (176)

1. A device for measuring the concentration of an analyte in a fluid, comprising a support member and a plurality of analyte sensing means provided thereon for measuring said concentration, wherein said device further comprises a plurality of conduits such that each of said sensing means has a conduit associated therewith, said conduits serving in use to direct said fluid to respective sensing means.
2. A device as claimed in claim 1 comprising a penetration member, preferably integrally formed, sufficiently short only to penetrate the cutaneous layer of skin, most.
3. A device as claimed in claim 1 or 2 comprising at least one microchannel for conveying a interstitial fluid to one or more of the sensing means.
4. A device as claimed in claim 1, 2 or 3 wherein at least some of said sensing means are the same or are for measuring the same analyte.
5. A device as claimed in claim 4 which is arranged such that in use the plurality of sensing means take measurements of the fluid at different times to enable monitoring of the concentration of the analyte in the fluid over a period of time.
6. A device for measuring the concentration of an analyte in a fluid, comprising a support member, analyte sensing means provided thereon for measuring said concentration and a microchannel in fluid communication with said analyte sensing means for conveying said fluid to said sensing means.
7. A device as claimed in claim 6 wherein the analyte sensing means comprises one or more reagents to react with said analyte and thereby give a measurable output.
8. A device as claimed in claim 7 wherein the reagent or at least one of the reagents is provided on a wall of the microchannel.
9. A device for measuring the concentration of an analyte in a fluid, comprising a support member and a microchannel provided on said support member for conveying said fluid across the support member, wherein one or more reagents for reacting with said analyte is coated on a wall of the microchannel.
10. A device as claimed in claim 9 comprising means for measuring the output of a reaction between the analyte and the reagent.
11. A device as claimed in any preceding claim comprising integral fluid extraction means for extracting a body fluid from a human of animal body fluid.
12. A device for measuring the concentration of an analyte in a fluid, comprising a support member, means provided on the support member for sensing said analyte, wherein said support member further comprises fluid extraction means arranged to direct fluid to said analyte sensing means via a conduit on the support member.
13. A device as claimed in claim 12 wherein said conduit comprises a microchannel.
14. A device as claimed in claim 11, 12 or 13 wherein said fluid extraction means comprises a skin penetration member.
15. A device as claimed in claim 14 wherein said skin penetration member is of such a length that it penetrates only the cutaneous layer of skin, not the sub-cutaneous layer.
16. A device as claimed in claim 15 wherein said skin penetration member is adapted to extract interstitial fluid.
17. A device for measuring the concentration of an analyte in a bodily fluid, comprising skin penetration means, said penetration means being sufficiently short so as to penetrate only the cutaneous layer of skin without penetrating the sub-cutaneous layer, and a support member, said support member comprising an analyte sensing site and a microchannel for conducting said body fluid from said penetration member to said analyte sensing site.
18. A device as claimed in claim 17 wherein said penetration means is integral with said support layer.
19. A device as claimed in any of claims 14 to 18 comprising a microneedle for extracting interstitial fluid.
20. A device as claimed in any preceding claim which is adapted to measure glucose concentration.
21. A device as claimed in any preceding claim comprising analyte sensing means including a mediated amperometric enzyme electrode.
22. A device as claimed in claim 21 adapted to utilise ferrocene-mediated electron transfer from a glucose-oxidase catalysed reaction.
23. A device as claimed in any preceding claim comprising a plurality of analyte sensing means.
24. A device as claimed in any preceding claim which is arranged to measure an analyte concentration directly.
25. A device as claimed in any preceding claim which is suitable for attachment to the skin of a subject for measuring the concentration of an analyte in blood or interstitial fluid of the subject.
26. A device as claimed in claim 25 comprising means for attaching the device to the skin.
27. A device for measuring the concentration of a given analyte in a body fluid comprising means for attaching the device to the skin of a subject and a plurality of sensing means for making a plurality of measurements of said concentration over a period of time.
28. A device as claimed in any preceding claim arranged to take measurements at predetermined intervals.
29. A device as claimed in claim 28 comprising flow control means for influencing the flow of fluid to the sensing means.
30. A device as claimed in claim 29 wherein the flow control means comprises a hydrophobic gate disposed in a microchannel.
31. A device as claimed in claim 30 comprising means for changing the hydrophobicity of said gate.
32. A device as claimed in claim 31 comprising a hydrophilic base material covered by a hydrophobic material and further comprising means for exposing said hydrophilic base material.
33. A device as claimed in claim 30 comprising pumping means arranged to apply a pressure to liquid in said microchannel sufficient to breach said hydrophobic gate.
34. A device as claimed in any preceding claim comprising a plurality of analyte sensing means, said device being arranged to direct fluid sequentially to each of the sensing means.
35. A device as claimed in claim 34 comprising or being adapted to interface with, control means for generating signals to control said direction of the fluid to the sensing means.
36. A device as claimed in claim 35 comprising said control configured so as to allow a user to specify when a measurement is to be made.
37. A device as claimed in claim 35 or 36 comprising calorimetric transduction means.
38. A device as claimed in any of claims 34 to 37 comprising a common fluid collection region arranged so as in use to be in fluid communication with a body fluid to be measured.
39. A device as claimed in claim 38 wherein each of said sensing means is in selective fluid communication with said common collection region.
40. A device for making a plurality of measurements of the concentration of an analyte in a fluid comprising a common sample collection site in fluid communication with the fluid to be measured and a plurality of sensing means for measuring said concentration.
41. A device as claimed in any of claims 34 to 40 comprising a sensing means for making a substantially continuous measurement of the concentration of a substance.
42. A device for measuring the concentration of an analyte in a fluid comprising a sensing means for measuring said concentration substantially continuously and calibration sensing means for performing at least one calibration measurement.
43. A device as claimed in claim 42 comprising a plurality of individual sensing means to allow a series of periodic calibration measurements to be performed.
44. A device as claimed in claim 44 wherein the continuous sensing means and calibration sensing means are provided on a common base member.
45. A device as claimed in claim 44, wherein said common base member comprises a patch or the like for attachment to the skin of a user.
46. A device as claimed in any of claims 42 to 45 comprising flow control means associated with fluid conduits for conducting fluid to the calibration sensing means.
47. A device as claimed in claim 46 wherein said flow control means comprises an electro-osmotic pumping arrangement.
48. A device as claimed in any of claims 42 to 47 which is suitable for attachment to a user's skin.
49. A device as claimed in any of claims 42 to 48 wherein said calibration sensing means comprises a single use sensor.
50. A device as claimed in any of claims 42 to 49 wherein said calibration sensing means is downstream of the continuous sensing means.
51. A device as claimed in any of claims 42 to 50 comprising one or more microchannels for conveying the fluid to be measured to the sensing means.
52. A device as claimed in any preceding claim which is suitable for attachment to a user's skin comprising transfer means for transferring said a body fluid from the user's body to a sensitive part of the device.
53. A device as claimed in claim 52 wherein said transfer means is arranged to transfer a fluid to the upstream end of a microchannel.
54. A device as claimed in claim 52 or 53 wherein said transfer means comprises a needle.
55. A device as claimed in claim 54 wherein said needle is a microneedle of such a length that it penetrates the cutaneous layer of skin, but not the sub-cutaneous layer.
56. A device as claimed in claim 54 or 55 wherein the needle comprises an aperture on a side surface thereof.
57. A device as claimed in any of claims 52 to 56 wherein said transfer means is invasive or semi-invasive, the device further comprising means for applying pressure to the user's skin in the region of penetration by said transfer means.
58. A device as claimed in any preceding claim comprising display means for displaying the concentration of an analyte being measured.
59. A device as claimed in claim 58 wherein said display means is separate from the rest of the device and receives data therefrom by telemetry.
60. A device as claimed in any preceding claim comprising means for administering a substance to a user on the device on the basis of a measured analyte concentration.
61. An device for administering a substance to a user comprising a measuring device for measuring the concentration of an analyte in a bodily fluid from said user, said measuring device comprising a plurality of analyte sensing means and at least one conduit, preferably a microchannel, for conveying said body fluid to at least one of the sensing means; the apparatus further comprising administration means for administering said substance to said user on the basis of said measurement of concentration.
62. A device as claimed in claim 61 wherein the measuring device comprises a self-adhesive patch for attachment to the skin of a user.
63. A device as claimed in claim 61 or 62 wherein said administration means is integrated with the measuring device.
64. An device as claimed in claim 63 wherein the administration means comprises a reservoir on or in the measuring device for dispensing the substance.
65. An device as claimed in claim 64 further comprising a pump for removing said substance from the reservoir.
66. An device as claimed in claim 65 comprising a single pump for both administering said substance to a user's body and for drawing out blood or interstitial fluid, to a sensing means for making an analyte concentration measurement.
67. A device as claimed in any preceding claim comprising electro-osmotic flow control means comprising a plurality of driving electrodes, said driving electrodes being provided substantially on one side of a channel.
68. A device as claimed in claim 67 wherein said driving electrodes extend circumferentially around an arcuate wall of the channel.
69. A device as claimed in any preceding claim comprising a main support member and a second substrate laminated to the main support member, said second substrate layer having one or more electrodes formed thereon.
70. A device as claimed in claim 69 wherein said second substrate is arranged to close a channel provided on the main support member.
71. A device for measuring the concentration of an analyte in a fluid comprising a support member having an open channel on a surface thereof the support member; and a second layer laminated onto said support member so as to close said channel.
72. A device as claimed in claim 71 wherein said channel is a microchannel.
73. A device as claimed in claim 71 or 72 comprising an integrated skin penetration member is provided which is also open on one side.
74. A device as a claimed in claim 73 wherein said skin penetration member is arranged so that upon insertion into skin, the skin itself effectively forms a wall of
75. A device for obtaining fluid through human or animal skin, comprising a skin penetration member having at least one longitudinal side open, the other sides being arranged so as effectively to cause the penetrated skin to act as the remaining longitudinal side of the member when the penetration member is inserted into the skin.
76. Apparatus for measuring an analyte optically comprising a device as claimed in any preceding claim for measuring said analyte and a separate test meter including light sensitive means, wherein said measuring device and said test meter are arranged such that in use the light sensitive means views said analyte along a channel of the measuring device.
77. Apparatus for measuring the light from an assay comprising an elongate conduit portion along which a sample fluid is drawn in use and a light sensitive means arranged to be sensitive to light coming substantially from the longitudinal axis of said conduit portion.
78. A disposable skin patch comprising an elongate conduit portion along which a sample fluid is drawn in use and a moulded plastics lens over said conduit portion.
79. A test meter for use with disposable skin patch as claimed in claim 78 comprising a light sensitive element arranged, in use, to sit over said lens when the meter is placed over the patch.
80. A method of measuring the amount of an analyte in a sample of liquid comprising providing an electrochemical measuring device having a sensor electrode within a microchannel, introducing said sample liquid into said microchannel, and measuring an aggregate current passed by said electrode to give an indication of said amount of analyte in the sample.
81. An electrochemical device for measuring the amount of an analyte in a sample of liquid comprising a sensor electrode disposed within a microchannel and means for measuring an aggregate current passed by said electrode in use to give an indication of said amount of analyte in the sample.
82. A method of making a device for measuring the concentration of a substance in a liquid comprising forming a first channel in a substrate material, fitting said channel at least partially with an electrically conductive material, and forming a second channel so as to intersect said first channel, thereby forming two conductive portions on respective opposite sides of the second channel.
83. A method of fabricating a device for measuring the concentration of an analyte in a fluid comprising providing a support member, forming an open channel on a surface of the support member and laminating a second layer onto said support member so as to close said channel.
84. An apparatus for obtaining and analyzing a sample of a body fluid from a skin layer, said apparatus comprising:
a support member;
a channel formed on said support chamber;
said channel having an entrance for receiving said body fluid;
an analyte sensor carried on said support member and positioned to sense an analyte in said fluid within said channel;
a flow controller for influencing a flow of fluid within said channel to said sensor.
85. An apparatus according to claim 84 further comprising a fluid extraction member for directing fluid from said skin layer to said entrance.
86. An apparatus according to claim 85 further comprising a flow restrictor between said fluid extraction member and said channel.
87. An apparatus according to claim 84 further comprising a waste reservoir in fluid flow communication with said channel.
88. An apparatus according to claim 84 wherein said flow controller includes a flow inhibitor in said channel inhibiting flow of said body fluid into said channel and a reliever for permitting discharge of said inhibitor from said channel to permit said fluid to flow into said channel.
89. An apparatus according to claim 88 wherein said flow inhibitor is an inhibitor fluid in said channel and said reliever includes a switch for permitting selective release of said inhibitor fluid from said channel.
90. An apparatus according to claim 89 wherein said switch includes a membrane blocking passage of said inhibitor fluid from said channel and selectively controllable electrodes for removing said membrane.
91. An apparatus according to claim 90 wherein said membrane is selected to be at least partially destroyed by energization of said electrodes.
92. An apparatus according to claim 89 wherein said inhibitor fluid is air and said switch vents said air from said channel.
93. An apparatus according to claim 84 wherein said flow controller includes a hydrophobic gate.
94. An apparatus according to claim 93 wherein said hydrophobic gate includes a hydrophobic length of said channel.
95. An apparatus according to claim 84 wherein said flow controller includes a bubble disposed in said channel with a vent to said channel to permit selective discharge of said bubble from said channel.
96. An apparatus according to claim 84 wherein said flow controller further comprises a pumping mechanism for urging fluid flow past said flow controller.
97. An apparatus according to claim 96 wherein said pumping mechanism is an electro-osmotic pump.
98. An apparatus according to claim 96 wherein said pumping mechanism is automatically controllable by a controller.
99. An apparatus according to claim 96 wherein said pumping mechanism is selectively controllable by a user.
100. An apparatus according to claim 84 wherein:
said channel is one of a plurality of channels each formed on said support chamber by forming channel defining walls on a said support member and each having an entrance for receiving said body fluid;
said analyte sensor is one of a plurality of analyte sensors each associated with a respective one of said plurality of channels.
101. An apparatus according to claim 100 wherein said controller operates to direct flow into a subsequent one of said plurality of channels after a residence time of said body fluid in a preceding one of said plurality of channels.
102. An apparatus according to claim 100 wherein each of said entrances is connected to a common source of said fluid.
103. An apparatus according to claim 100 wherein said plurality of channels and associated sensors include:
at least a first continuous sensor for sensing a concentration of an analyte in fluid within said channel associated with said continuous sensor; and
at least a first calibration sensor for performing as least one calibration measurement of a concentration of an analyte in fluid within said channel associated with said calibration sensor.
104. A method of continuously sampling and measuring an analyte comprising:
extracting a fluid into a common collection port;
directing said fluid along a channel towards an analyte sensing means;
performing at least an analyte measurement on the fluid;
switching the flow of fluid from one channel to sequentially at least another channel after a certain period of time; and
performing at least a further analyte measurement.
105. An apparatus according to claim 84 further comprising an administrator for administering a substance to a user based upon a measuring based upon a sensing of said analyte sensor.
106. An apparatus for obtaining and analyzing a sample of a body fluid from a skin layer, said apparatus comprising:
a support member;
a channel formed on said support chamber by forming channel defining wall on a said support member;
said channel having an entrance for receiving said body fluid;
said channel having a minute size with a volume less than 200 nanoliters;
an analyte sensor carried on said support member and positioned to sense an analyte in said fluid within said channel.
107. An apparatus according to claim 106 wherein said channel has a longitudinal dimension less than 10 mm.
108. An apparatus according to claim 106 wherein said channel has a lateral dimension less than 200 micrometres.
109. An apparatus according to claim 108 wherein said lateral dimension is greater than 10 micrometres.
110. An apparatus according to claim 106 wherein said analyte sensor includes a reagent deposited on said wall for reacting with an analyte of said fluid when said fluid is within said channel.
111. An apparatus according to claim 106 further comprising a fluid extraction member for directing fluid from said skin layer to said entrance.
112. An apparatus according to claim 111 wherein said fluid extraction member is a penetration member for penetrating into only a cutaneous layer of said skin layer and said fluid extraction member has a fluid pathway for fluid to flow from said cutaneous layer to said entrance of said channel.
113. An apparatus according to claim 112 comprising a plurality of said fluid extraction members.
114. An apparatus according to claim 112 wherein said penetration member is a hollow needle with a bore of said needle defining said fluid pathway.
115. An apparatus according to claim 112 wherein said penetration member is a lance having opposing surfaces defining said fluid pathway and with said fluid pathway open to an exterior of said lance.
116. An apparatus according to claim 111 wherein said fluid extraction member includes means for iontophoretic transfer of fluid from said skin layer to said entrance.
117. An apparatus according to claim 111 wherein said fluid extraction member includes means for ultra-sonic transfer of fluid from said skin layer to said entrance.
118. An apparatus according to claim 111 wherein said fluid extraction member includes means for suction-assisted transfer of fluid from said skin layer to said entrance.
119. An apparatus according to claim 111 further comprising an electric field generator for stimulating the skin layer and urging fluid to flow to said entrance.
120. An apparatus according to claim 119 wherein said fluid extraction member includes an electrode which comprises a portion of said electric field generator.
121. An apparatus according to claim 86 further comprising a flow controller for influencing a flow of fluid within said channel to said sensor.
122. An apparatus according to claim 86 wherein:
said channel is one of a plurality of channels each formed on said support chamber by forming channel defining walls on a said support member and each having an entrance for receiving said body fluid;
said analyte sensor is one of a plurality of analyte sensors each associated with a respective one of said plurality of channels.
123. An apparatus according to claim 101 wherein each of said entrances is connected to a common source of said fluid.
124. An apparatus according to claim 101 wherein said plurality of channels and associated sensors include:
at least a first continuous sensor for sensing a concentration of an analyte in fluid within said channel associated with said continuous sensor; and
at least a first calibration sensor for performing as least one calibration measurement of a concentration of an analyte in fluid within said channel associated with said calibration sensor.
125. An apparatus according to claim 106 wherein said analyte sensor includes an electro-chemical sensor.
126. An apparatus according to claim 106 wherein said analyte sensor includes a plurality of electrodes.
127. An apparatus according to claim 106 wherein at least one of said electrodes is an electrically conductive material deposited in said channel.
128. An apparatus according to claim 106 wherein said channel is formed in an electrically conductive material with said material comprising at least one of said electrodes.
129. An apparatus according to claim 106 wherein said analyte sensor includes a calorimetric sensor.
130. An apparatus according to claim 106 further comprising an administrator for administering a substance to a user based upon a measuring based upon a sensing of said analyte sensor.
131. An apparatus for obtaining and analyzing a sample of a body fluid from a skin layer, said apparatus comprising:
a support member;
a channel formed on said support chamber by forming channel defining wall on a said support member;
said channel having an entrance for receiving said body fluid;
said channel having a reagent deposited on said wall for reacting with an analyte of said fluid when said fluid is within said channel.
132. An apparatus according to claim 131 wherein said channel has a volume less than 200 nanoliters.
133. An apparatus according to claim 132 wherein said channel has a longitudinal dimension less than 10 mm.
134. An apparatus according to claim 132 wherein said channel has a lateral dimension less than 500 micrometres.
135. An apparatus according to claim 134 wherein said lateral dimension is less than 200 micrometres.
136. An apparatus according to claim 135 wherein said lateral dimension is greater than 10 micrometres
137. An apparatus according to claim 131 further comprising a fluid extraction member for directing fluid from said skin layer to said entrance.
138. An apparatus according to claim 137 wherein said fluid extraction member is a penetration member for penetrating into only a cutaneous layer of said skin layer and said fluid extraction member has a fluid pathway for fluid to flow from said cutaneous layer to said entrance of said channel.
139. An apparatus according to claim 138 wherein said penetration member is a hollow needle with a bore of said needle defining said fluid pathway.
140. An apparatus according to claim 138 wherein said penetration member is a lance having opposing surfaces defining said fluid pathway and with said fluid pathway open to an exterior of said lance.
141. An apparatus according to claim 131 further comprising a flow controller for influencing a flow of fluid within said channel to a portion of said channel containing said reagent.
142. An apparatus according to claim 131 wherein:
said channel is one of a plurality of channels each formed on said support chamber by forming channel defining walls on a said support member and each having an entrance for receiving said body fluid;
each of said channels provided with a respective reagent on a defining wall of said channels.
143. An apparatus according to claim 142 wherein each of said entrances is connected to a common source of said fluid.
144. An apparatus according to claim 142 wherein said plurality of channels includes:
at least a first continuous sensor for sensing a concentration of an analyte in fluid within said channel associated with said continuous sensor; and
at least a first calibration sensor for performing as least one calibration measurement of a concentration of an analyte in fluid within said channel associated with said calibration sensor.
145. An apparatus for obtaining and analyzing a sample of a body fluid from a skin layer, said apparatus comprising:
a support member;
a channel formed on said support chamber by forming channel defining wall on a said support member;
said channel having an entrance for receiving said body fluid;
a fluid extraction member for directing fluid from said skin layer to said entrance;
said channel having a minute size with a volume less than 200 nanoliters;
an analyte sensor carried on said support member and positioned to sense an analyte in said fluid within said channel.
146. An apparatus according to claim 145 wherein said channel has a longitudinal dimension less than 10 mm.
147. An apparatus according to claim 145 wherein said channel has a lateral dimension is less than 200 micrometres.
148. An apparatus according to claim 147 wherein said lateral dimension is greater than 10 micrometres.
149. An apparatus according to claim 145 wherein said analyte sensor includes an electrochemical sensor positioned to be in contact with said fluid when said fluid is within said channel.
150. An apparatus according to claim 145 wherein said fluid extraction member is a penetration member for penetrating into only a cutaneous layer of said skin layer and said fluid extraction member has a fluid pathway for fluid to flow from said cutaneous layer to said entrance of said channel.
151. An apparatus according to claim 150 wherein said penetration member is a hollow needle with a bore of said needle defining said fluid pathway.
152. An apparatus according to claim 150 wherein said penetration member is a lance having opposing surfaces defining said fluid pathway and with said fluid pathway open to an exterior of said lance.
153. An apparatus according to claim 145 further comprising a flow controller for influencing a flow of fluid within said channel to said sensor.
154. An apparatus according to claim 145 wherein:
said channel is one of a plurality of channels each formed on said support chamber by forming channel defining walls on a said support member and each having an entrance for receiving said body fluid;
said analyte sensor is one of a plurality of analyte sensors each associated with a respective one of said plurality of channels.
155. An apparatus according to claim 154 wherein each of said entrances is connected to a common source of said fluid.
156. An apparatus according to claim 154 wherein said plurality of channels and associated sensors include:
at least a first continuous sensor for sensing a concentration of an analyte in fluid within said channel associated with said continuous sensor; and
at least a first calibration sensor for performing as least one calibration measurement of a concentration of an analyte in fluid within said channel associated with said calibration sensor.
157. An apparatus according to claim 84 further comprising an administrator for administering a substance to a user based upon a measuring based upon a sensing of said analyte sensor.
158. An apparatus according to claim 84 wherein said analyte sensor includes a light sensor disposed to be sensitive to light coming substantially from a longitudinal axis of said channel.
159. An apparatus for obtaining and analyzing a sample of a body fluid from a skin layer, said apparatus comprising:
a support member;
a plurality of channels each formed on said support chamber by forming channel defining walls on a said support member;
each of said channels having an entrance for receiving said body fluid;
a plurality of analyte sensors each associated with a respective one of said plurality of channels, each of said analyte sensors carried on said support member and positioned to sense an analyte in said fluid within said respective one of said plurality of channels.
160. An apparatus according to claim 159 wherein said channel has a minute size with a lateral dimension less than 500 micrometres.
161. An apparatus according to claim 159 wherein said channel has a volume less than 200 nanoliters.
162. An apparatus according to claim 161 wherein said channel has a longitudinal dimension less than 10 mm.
163. An apparatus according to claim 160 wherein said lateral dimension is less than 200 micrometres.
164. An apparatus according to claim 163 wherein said lateral dimension is greater than 10 micrometres
165. An apparatus according to claim 159 wherein said analyte sensor includes an electrochemical sensor positioned to be in contact with said fluid when said fluid is within said channel.
166. An apparatus according to claim 159 further comprising a fluid extraction member for directing fluid from said skin layer to said entrance.
167. An apparatus according to claim 166 wherein said fluid extraction member is a penetration member for penetrating into only a cutaneous layer of said skin layer and said fluid extraction member has a fluid pathway for fluid to flow from said cutaneous layer to said entrance of said channel.
168. An apparatus according to claim 167 wherein said penetration member is a hollow needle with a bore of said needle defining said fluid pathway.
169. An apparatus according to claim 167 wherein said penetration member is a lance having opposing surfaces defining said fluid pathway and with said fluid pathway open to an exterior of said lance.
170. An apparatus according to claim 159 wherein each of said entrances is connected to a common source of said fluid.
171. An apparatus according to claim 159 wherein said plurality of channels and associated sensors include:
at least a first continuous sensor for sensing a concentration of an analyte in fluid within said channel associated with said continuous sensor; and
at least a first calibration sensor for performing as least one calibration measurement of a concentration of an analyte in fluid within said channel associated with said calibration sensor.
172. An apparatus according to claim 159 further comprising an administrator for administering a substance to a user based upon a measuring based upon a sensing of said analyte sensors.
173. A method of making a device for measuring the concentration of a substance in a liquid, said method comprising:
forming a first channel in a substrate material;
fitting said channel at least partially with an electrically conductive material;
forming a second channel so as to intersect with said first channel.
174. A method of fabricating a device for measuring the concentration of an analyte in a fluid, said method comprising:
forming a support member;
forming an open channel on a surface of the support member;
laminating a layer onto said support member so as to close said channel.
175. An apparatus according to claim 174 wherein said laminate layer contains electrodes disposed to be in contact with said open channel.
176. An apparatus according to claim 175 wherein said electrodes are formed through a screen-printing process.
US10/432,827 2000-12-19 2001-12-19 Analyte measurement Abandoned US20040096959A1 (en)

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Cited By (184)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020137998A1 (en) * 2001-03-26 2002-09-26 Wilson Smart Silicon microprobe with integrated biosensor
US20030018282A1 (en) * 2001-07-20 2003-01-23 Carlo Effenhauser System for withdrawing small amounts of body fluid
US20040193072A1 (en) * 2003-03-28 2004-09-30 Allen John J. Method of analyte measurement using integrated lance and strip
US20050049522A1 (en) * 2002-10-30 2005-03-03 Allen John J Method of lancing skin for the extraction of blood
US20050059166A1 (en) * 2003-09-11 2005-03-17 Robert Markes Sampling instrument
US20050106713A1 (en) * 2003-09-03 2005-05-19 Phan Brigitte C. Personal diagnostic devices and related methods
US20050187525A1 (en) * 2004-02-19 2005-08-25 Hilgers Michael E. Devices and methods for extracting bodily fluid
US20050217743A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Triggerable passive valve for use in controlling the flow of fluid
US20050217741A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Method of controlling the movement of fluid through a microfluidic circuit using an array of triggerable passive valves
US20050217742A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Microfluidic circuit including an array of triggerable passive valves
US20050220629A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Method of segregating a bolus of fluid using a pneumatic actuator in a fluid handling circuit
US20050220644A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Pneumatic actuator for bolus generation in a fluid handling circuit
US20050220630A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Method of using triggerable passive valves to control the flow of fluid
US20050284773A1 (en) * 2004-06-29 2005-12-29 Allen John J Method of preventing reuse in an analyte measuring system
US20060000710A1 (en) * 2004-06-30 2006-01-05 Klaus Peter Weidenhaupt Fluid handling methods
US20060030789A1 (en) * 2003-03-28 2006-02-09 Allen John J Integrated lance and strip for analyte measurement
WO2006030201A1 (en) 2004-09-13 2006-03-23 Microsample Ltd. Method and apparatus for sampling and analysis of fluids
US20060062852A1 (en) * 2003-09-11 2006-03-23 Holmes Elizabeth A Medical device for analyte monitoring and drug delivery
US20060074351A1 (en) * 2003-03-28 2006-04-06 Allen John J Integrated lance and strip for analyte measurement
US20060200045A1 (en) * 2005-03-02 2006-09-07 Roe Steven N Dynamic integrated lancing test strip with sterility cover
WO2006105146A2 (en) 2005-03-29 2006-10-05 Arkal Medical, Inc. Devices, systems, methods and tools for continuous glucose monitoring
WO2006114649A1 (en) 2005-04-26 2006-11-02 Bio-Nano Sensium Technologies Limited Sensor configuration
US20060264779A1 (en) * 2005-05-09 2006-11-23 Kemp Timothy M Fluidic medical devices and uses thereof
US20070078313A1 (en) * 2005-09-30 2007-04-05 Rosedale Medical, Inc. Fluid sample transport devices and methods
US20070167869A1 (en) * 2005-03-02 2007-07-19 Roe Steven N System and method for breaking a sterility seal to engage a lancet
US20070224084A1 (en) * 2006-03-24 2007-09-27 Holmes Elizabeth A Systems and Methods of Sample Processing and Fluid Control in a Fluidic System
US20070232876A1 (en) * 2006-03-31 2007-10-04 Erik Otto Diabetes management methods and systems
US20070264629A1 (en) * 2006-05-10 2007-11-15 Holmes Elizabeth A Real-Time Detection of Influenza Virus
US20070276211A1 (en) * 2006-05-26 2007-11-29 Jose Mir Compact minimally invasive biomedical monitor
WO2008043565A2 (en) * 2006-10-13 2008-04-17 Roche Diagnostics Gmbh Tape transport lance sampler
US20080139894A1 (en) * 2006-12-08 2008-06-12 Joanna Szydlo-Moore Devices and systems for remote physiological monitoring
US20080154107A1 (en) * 2006-12-20 2008-06-26 Jina Arvind N Device, systems, methods and tools for continuous glucose monitoring
US20080234562A1 (en) * 2007-03-19 2008-09-25 Jina Arvind N Continuous analyte monitor with multi-point self-calibration
US20080312518A1 (en) * 2007-06-14 2008-12-18 Arkal Medical, Inc On-demand analyte monitor and method of use
US20090007631A1 (en) * 2004-08-02 2009-01-08 Daikin Industries, Ltd. Oxygen Electrode
US20090082652A1 (en) * 2007-09-25 2009-03-26 Pacesetter, Inc. Implantable body fluid analyzer
US20090082693A1 (en) * 2004-12-29 2009-03-26 Therasense, Inc. Method and apparatus for providing temperature sensor module in a data communication system
US20090093697A1 (en) * 2007-08-10 2009-04-09 Jose Mir Mems interstitial prothrombin time test
US20090099478A1 (en) * 2006-03-13 2009-04-16 Microsample Ltd Method and apparatus for piercing the skin and delivery or collection of liquids
US20090131778A1 (en) * 2006-03-28 2009-05-21 Jina Arvind N Devices, systems, methods and tools for continuous glucose monitoring
WO2009081404A1 (en) * 2007-12-26 2009-07-02 Medingo Ltd. System and method for glycemic control
EP2083878A2 (en) * 2006-10-23 2009-08-05 Abbott Diabetes Care, Inc. Flexible patch for fluid delivery and monitoring body analytes
US20100023045A1 (en) * 2006-07-15 2010-01-28 Heinz Macho Lancet, Lancet Supply Ribbon, and Puncturing Device for Generating a Puncturing Wound
US20100049021A1 (en) * 2006-03-28 2010-02-25 Jina Arvind N Devices, systems, methods and tools for continuous analyte monitoring
US7679407B2 (en) 2003-04-28 2010-03-16 Abbott Diabetes Care Inc. Method and apparatus for providing peak detection circuitry for data communication systems
US20100100005A1 (en) * 2006-07-11 2010-04-22 Infotonics Technology Center, Inc. Minimally invasive allergy testing system with coated allergens
US7756561B2 (en) 2005-09-30 2010-07-13 Abbott Diabetes Care Inc. Method and apparatus for providing rechargeable power in data monitoring and management systems
US7766829B2 (en) 2005-11-04 2010-08-03 Abbott Diabetes Care Inc. Method and system for providing basal profile modification in analyte monitoring and management systems
US7768408B2 (en) 2005-05-17 2010-08-03 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
WO2010086380A1 (en) 2009-01-30 2010-08-05 Pronota N.V. Biomarker for diagnosis, prediction and/or prognosis of acute heart failure and uses thereof
US20100219084A1 (en) * 2006-10-05 2010-09-02 Stephen Patrick Blythe Method for determining hematocrit corrected analyte concentrations
US20100248277A1 (en) * 2006-11-14 2010-09-30 Ian Gibbons Detection and quantification of analytes in bodily fluids
US7811231B2 (en) 2002-12-31 2010-10-12 Abbott Diabetes Care Inc. Continuous glucose monitoring system and methods of use
US7860544B2 (en) 1998-04-30 2010-12-28 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US20110004084A1 (en) * 2003-10-31 2011-01-06 Abbott Diabetes Care Inc. Method of Calibrating an Analyte-Measurement Device, and Associated Methods, Devices and Systems
US7920907B2 (en) 2006-06-07 2011-04-05 Abbott Diabetes Care Inc. Analyte monitoring system and method
US7922458B2 (en) 2002-10-09 2011-04-12 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US7928850B2 (en) 2007-05-08 2011-04-19 Abbott Diabetes Care Inc. Analyte monitoring system and methods
WO2011048168A1 (en) 2009-10-21 2011-04-28 Pronota N.V. Biomarker for diagnosis, prediction and/or prognosis of acute heart failure and uses thereof
EP2329035A2 (en) * 2008-06-04 2011-06-08 Seventh Sense Biosystems, Inc. Compositions and methods for rapid one-step diagnosis
US20110162978A1 (en) * 2006-10-05 2011-07-07 Lifescan Scotland Ltd. Systems and methods for determining a substantially hematocrit independent analyte concentration
US7976778B2 (en) 2001-04-02 2011-07-12 Abbott Diabetes Care Inc. Blood glucose tracking apparatus
US20110230905A1 (en) * 2006-10-13 2011-09-22 Roche Diagnostics Operations, Inc. Tape transport lance sampler
US8029460B2 (en) 2005-03-21 2011-10-04 Abbott Diabetes Care Inc. Method and system for providing integrated medication infusion and analyte monitoring system
WO2011128357A2 (en) 2010-04-13 2011-10-20 Pronota N.V. Biomarkers for hypertensive disorders of pregnancy
US8047811B2 (en) 2002-10-09 2011-11-01 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US8066639B2 (en) 2003-06-10 2011-11-29 Abbott Diabetes Care Inc. Glucose measuring device for use in personal area network
US8103456B2 (en) 2009-01-29 2012-01-24 Abbott Diabetes Care Inc. Method and device for early signal attenuation detection using blood glucose measurements
US20120022352A1 (en) * 2005-10-12 2012-01-26 Masaki Fujiwara Blood sensor, blood testing apparatus, and method for controlling blood testing apparatus
US8112138B2 (en) 2005-06-03 2012-02-07 Abbott Diabetes Care Inc. Method and apparatus for providing rechargeable power in data monitoring and management systems
US8112240B2 (en) 2005-04-29 2012-02-07 Abbott Diabetes Care Inc. Method and apparatus for providing leak detection in data monitoring and management systems
US8123686B2 (en) 2007-03-01 2012-02-28 Abbott Diabetes Care Inc. Method and apparatus for providing rolling data in communication systems
US8149117B2 (en) 2007-05-08 2012-04-03 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8158430B1 (en) 2007-08-06 2012-04-17 Theranos, Inc. Systems and methods of fluidic sample processing
US8226891B2 (en) 2006-03-31 2012-07-24 Abbott Diabetes Care Inc. Analyte monitoring devices and methods therefor
US8231832B2 (en) 2003-03-24 2012-07-31 Intuity Medical, Inc. Analyte concentration detection devices and methods
US8287454B2 (en) 1998-04-30 2012-10-16 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8333714B2 (en) 2006-09-10 2012-12-18 Abbott Diabetes Care Inc. Method and system for providing an integrated analyte sensor insertion device and data processing unit
US20120323097A9 (en) * 2008-06-30 2012-12-20 Nemaura Pharma Limited Patch for reverse iontophoresis
US8346337B2 (en) 1998-04-30 2013-01-01 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8343093B2 (en) 2002-10-09 2013-01-01 Abbott Diabetes Care Inc. Fluid delivery device with autocalibration
US8344966B2 (en) 2006-01-31 2013-01-01 Abbott Diabetes Care Inc. Method and system for providing a fault tolerant display unit in an electronic device
US8360993B2 (en) 2005-09-30 2013-01-29 Intuity Medical, Inc. Method for body fluid sample extraction
US8456301B2 (en) 2007-05-08 2013-06-04 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8467972B2 (en) 2009-04-28 2013-06-18 Abbott Diabetes Care Inc. Closed loop blood glucose control algorithm analysis
US8465425B2 (en) 1998-04-30 2013-06-18 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8512243B2 (en) 2005-09-30 2013-08-20 Abbott Diabetes Care Inc. Integrated introducer and transmitter assembly and methods of use
US8545403B2 (en) 2005-12-28 2013-10-01 Abbott Diabetes Care Inc. Medical device insertion
US8560082B2 (en) 2009-01-30 2013-10-15 Abbott Diabetes Care Inc. Computerized determination of insulin pump therapy parameters using real time and retrospective data processing
US8561795B2 (en) 2010-07-16 2013-10-22 Seventh Sense Biosystems, Inc. Low-pressure packaging for fluid devices
US8571624B2 (en) 2004-12-29 2013-10-29 Abbott Diabetes Care Inc. Method and apparatus for mounting a data transmission device in a communication system
US8579853B2 (en) 2006-10-31 2013-11-12 Abbott Diabetes Care Inc. Infusion devices and methods
US8593109B2 (en) 2006-03-31 2013-11-26 Abbott Diabetes Care Inc. Method and system for powering an electronic device
US8602991B2 (en) 2005-08-30 2013-12-10 Abbott Diabetes Care Inc. Analyte sensor introducer and methods of use
US8612159B2 (en) 1998-04-30 2013-12-17 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8613703B2 (en) 2007-05-31 2013-12-24 Abbott Diabetes Care Inc. Insertion devices and methods
US8638220B2 (en) 2005-10-31 2014-01-28 Abbott Diabetes Care Inc. Method and apparatus for providing data communication in data monitoring and management systems
US8652043B2 (en) 2001-01-02 2014-02-18 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8665091B2 (en) 2007-05-08 2014-03-04 Abbott Diabetes Care Inc. Method and device for determining elapsed sensor life
US8688188B2 (en) 1998-04-30 2014-04-01 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8732188B2 (en) 2007-02-18 2014-05-20 Abbott Diabetes Care Inc. Method and system for providing contextual based medication dosage determination
US20140154708A1 (en) * 2006-10-13 2014-06-05 Theranos, Inc. Reducing optical interference in a fluidic device
US8764657B2 (en) 2010-03-24 2014-07-01 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US8771183B2 (en) 2004-02-17 2014-07-08 Abbott Diabetes Care Inc. Method and system for providing data communication in continuous glucose monitoring and management system
US8798934B2 (en) 2009-07-23 2014-08-05 Abbott Diabetes Care Inc. Real time management of data relating to physiological control of glucose levels
US8801631B2 (en) * 2005-09-30 2014-08-12 Intuity Medical, Inc. Devices and methods for facilitating fluid transport
US8808202B2 (en) 2010-11-09 2014-08-19 Seventh Sense Biosystems, Inc. Systems and interfaces for blood sampling
US8821412B2 (en) 2009-03-02 2014-09-02 Seventh Sense Biosystems, Inc. Delivering and/or receiving fluids
WO2014143452A1 (en) 2013-03-15 2014-09-18 Abbott Diabetes Care Inc. In vivo glucose sensing in an increased perfusion dermal layer
US8852101B2 (en) 2005-12-28 2014-10-07 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
US8862448B2 (en) 2009-10-19 2014-10-14 Theranos, Inc. Integrated health data capture and analysis system
US8919605B2 (en) 2009-11-30 2014-12-30 Intuity Medical, Inc. Calibration material delivery devices and methods
US8930203B2 (en) 2007-02-18 2015-01-06 Abbott Diabetes Care Inc. Multi-function analyte test device and methods therefor
US8969097B2 (en) 2005-06-13 2015-03-03 Intuity Medical, Inc. Analyte detection devices and methods with hematocrit-volume correction and feedback control
US8974386B2 (en) 1998-04-30 2015-03-10 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8993331B2 (en) 2009-08-31 2015-03-31 Abbott Diabetes Care Inc. Analyte monitoring system and methods for managing power and noise
US9033898B2 (en) 2010-06-23 2015-05-19 Seventh Sense Biosystems, Inc. Sampling devices and methods involving relatively little pain
US9041541B2 (en) 2010-01-28 2015-05-26 Seventh Sense Biosystems, Inc. Monitoring or feedback systems and methods
US9046480B2 (en) 2006-10-05 2015-06-02 Lifescan Scotland Limited Method for determining hematocrit corrected analyte concentrations
US9066695B2 (en) 1998-04-30 2015-06-30 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US20150182157A1 (en) * 2013-12-30 2015-07-02 CardioCanary, Inc. On-Patient Autonomous Blood Sampler and Analyte Measurement Device
US9113836B2 (en) 2009-03-02 2015-08-25 Seventh Sense Biosystems, Inc. Devices and techniques associated with diagnostics, therapies, and other applications, including skin-associated applications
US9121851B2 (en) 2007-10-02 2015-09-01 Theranos, Inc. Modular point-of-care devices, systems, and uses thereof
US9119578B2 (en) 2011-04-29 2015-09-01 Seventh Sense Biosystems, Inc. Plasma or serum production and removal of fluids under reduced pressure
EP2924439A1 (en) 2010-03-26 2015-09-30 Mycartis N.V. Ltbp2 as a biomarker for predicting or prognosticating mortality
US9226701B2 (en) 2009-04-28 2016-01-05 Abbott Diabetes Care Inc. Error detection in critical repeating data in a wireless sensor system
US9295417B2 (en) 2011-04-29 2016-03-29 Seventh Sense Biosystems, Inc. Systems and methods for collecting fluid from a subject
US9314195B2 (en) 2009-08-31 2016-04-19 Abbott Diabetes Care Inc. Analyte signal processing device and methods
US9320461B2 (en) 2009-09-29 2016-04-26 Abbott Diabetes Care Inc. Method and apparatus for providing notification function in analyte monitoring systems
US9351669B2 (en) 2009-09-30 2016-05-31 Abbott Diabetes Care Inc. Interconnect for on-body analyte monitoring device
US9398882B2 (en) 2005-09-30 2016-07-26 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor and data processing device
US9402544B2 (en) 2009-02-03 2016-08-02 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US9402570B2 (en) 2011-12-11 2016-08-02 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
US9464981B2 (en) 2011-01-21 2016-10-11 Theranos, Inc. Systems and methods for sample use maximization
US9480427B2 (en) 2011-05-06 2016-11-01 Roche Diabetes Care, Inc. Lancet
US9521968B2 (en) 2005-09-30 2016-12-20 Abbott Diabetes Care Inc. Analyte sensor retention mechanism and methods of use
US9572534B2 (en) 2010-06-29 2017-02-21 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US9619627B2 (en) 2011-09-25 2017-04-11 Theranos, Inc. Systems and methods for collecting and transmitting assay results
US9636060B2 (en) 2012-12-18 2017-05-02 Abbott Diabetes Care Inc. Dermal layer analyte sensing devices and methods
US9636051B2 (en) 2008-06-06 2017-05-02 Intuity Medical, Inc. Detection meter and mode of operation
WO2017139084A1 (en) * 2016-02-11 2017-08-17 Applied Materials, Inc. Medical bodily fluid sampling device
US9743862B2 (en) 2011-03-31 2017-08-29 Abbott Diabetes Care Inc. Systems and methods for transcutaneously implanting medical devices
US20170252019A1 (en) * 2014-11-21 2017-09-07 Korea Institute Of Science And Technology Tear collection device
US9782114B2 (en) 2011-08-03 2017-10-10 Intuity Medical, Inc. Devices and methods for body fluid sampling and analysis
US9788771B2 (en) 2006-10-23 2017-10-17 Abbott Diabetes Care Inc. Variable speed sensor insertion devices and methods of use
US9833183B2 (en) 2008-05-30 2017-12-05 Intuity Medical, Inc. Body fluid sampling device—sampling site interface
US20180103884A1 (en) * 2016-10-18 2018-04-19 International Business Machines Corporation Diagnostic apparatus
US9968306B2 (en) 2012-09-17 2018-05-15 Abbott Diabetes Care Inc. Methods and apparatuses for providing adverse condition notification with enhanced wireless communication range in analyte monitoring systems
US9980670B2 (en) 2002-11-05 2018-05-29 Abbott Diabetes Care Inc. Sensor inserter assembly
US9980669B2 (en) 2011-11-07 2018-05-29 Abbott Diabetes Care Inc. Analyte monitoring device and methods
US10028680B2 (en) 2006-04-28 2018-07-24 Abbott Diabetes Care Inc. Introducer assembly and methods of use
US10117614B2 (en) 2006-02-28 2018-11-06 Abbott Diabetes Care Inc. Method and system for providing continuous calibration of implantable analyte sensors
US10194863B2 (en) 2005-09-30 2019-02-05 Abbott Diabetes Care Inc. Integrated transmitter unit and sensor introducer mechanism and methods of use
US10213139B2 (en) 2015-05-14 2019-02-26 Abbott Diabetes Care Inc. Systems, devices, and methods for assembling an applicator and sensor control device
US10226207B2 (en) 2004-12-29 2019-03-12 Abbott Diabetes Care Inc. Sensor inserter having introducer
US10244981B2 (en) 2011-03-30 2019-04-02 SensiVida Medical Technologies, Inc. Skin test image analysis apparatuses and methods thereof
US10330667B2 (en) 2010-06-25 2019-06-25 Intuity Medical, Inc. Analyte monitoring methods and systems
US10383556B2 (en) 2008-06-06 2019-08-20 Intuity Medical, Inc. Medical diagnostic devices and methods
US10543310B2 (en) 2011-12-19 2020-01-28 Seventh Sense Biosystems, Inc. Delivering and/or receiving material with respect to a subject surface
US10674944B2 (en) 2015-05-14 2020-06-09 Abbott Diabetes Care Inc. Compact medical device inserters and related systems and methods
US20200205721A1 (en) * 2017-09-07 2020-07-02 The Regents Of The University Of California Multiplexed sweat extraction and sensing wearable device for normalized and time-sequential sweat analysis
US10729386B2 (en) 2013-06-21 2020-08-04 Intuity Medical, Inc. Analyte monitoring system with audible feedback
US10772550B2 (en) 2002-02-08 2020-09-15 Intuity Medical, Inc. Autonomous, ambulatory analyte monitor or drug delivery device
USD902408S1 (en) 2003-11-05 2020-11-17 Abbott Diabetes Care Inc. Analyte sensor control unit
EP3753485A1 (en) * 2019-06-20 2020-12-23 Nokia Technologies Oy Electrode apparatuses and methods of forming electrode apparatuses
US20200397352A1 (en) * 2018-03-06 2020-12-24 Xsensio SA System for collection and analysis of biofluid from skin and method of using the same
US10874338B2 (en) 2010-06-29 2020-12-29 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US10925523B2 (en) * 2017-06-02 2021-02-23 Northwestern University Microfluidic systems for epidermal sampling and sensing
US20210093234A1 (en) * 2017-12-11 2021-04-01 Stc.Unm Mild Traumatic Brain Injury Diagnostic Immunochromatographic Microneedle Patch
WO2021076933A1 (en) * 2019-10-16 2021-04-22 Jason Michael Strohmaier Wearable point-of-care devices for assessing immune activity from interstitial fluid and methods of use thereof
US10987039B2 (en) 2014-12-03 2021-04-27 Stmicroelectronics S.R.L. Microneedle array device and method of making
USD924406S1 (en) 2010-02-01 2021-07-06 Abbott Diabetes Care Inc. Analyte sensor inserter
US11071478B2 (en) 2017-01-23 2021-07-27 Abbott Diabetes Care Inc. Systems, devices and methods for analyte sensor insertion
US11177029B2 (en) 2010-08-13 2021-11-16 Yourbio Health, Inc. Systems and techniques for monitoring subjects
US11202895B2 (en) 2010-07-26 2021-12-21 Yourbio Health, Inc. Rapid delivery and/or receiving of fluids
US11229382B2 (en) 2013-12-31 2022-01-25 Abbott Diabetes Care Inc. Self-powered analyte sensor and devices using the same
US11287421B2 (en) 2006-03-24 2022-03-29 Labrador Diagnostics Llc Systems and methods of sample processing and fluid control in a fluidic system
US11291751B2 (en) * 2006-11-06 2022-04-05 Aardvark Medical, Inc. Irrigation and aspiration device and methods
US11298058B2 (en) 2005-12-28 2022-04-12 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
USD961778S1 (en) 2006-02-28 2022-08-23 Abbott Diabetes Care Inc. Analyte sensor device
USD962446S1 (en) 2009-08-31 2022-08-30 Abbott Diabetes Care, Inc. Analyte sensor device
USD982762S1 (en) 2020-12-21 2023-04-04 Abbott Diabetes Care Inc. Analyte sensor inserter
US11793936B2 (en) 2009-05-29 2023-10-24 Abbott Diabetes Care Inc. Medical device antenna systems having external antenna configurations
USD1002852S1 (en) 2019-06-06 2023-10-24 Abbott Diabetes Care Inc. Analyte sensor device

Families Citing this family (249)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6036924A (en) 1997-12-04 2000-03-14 Hewlett-Packard Company Cassette of lancet cartridges for sampling blood
US6391005B1 (en) 1998-03-30 2002-05-21 Agilent Technologies, Inc. Apparatus and method for penetration with shaft having a sensor for sensing penetration depth
US20050103624A1 (en) 1999-10-04 2005-05-19 Bhullar Raghbir S. Biosensor and method of making
US8641644B2 (en) 2000-11-21 2014-02-04 Sanofi-Aventis Deutschland Gmbh Blood testing apparatus having a rotatable cartridge with multiple lancing elements and testing means
US7144495B2 (en) * 2000-12-13 2006-12-05 Lifescan, Inc. Electrochemical test strip with an integrated micro-needle and associated methods
US9226699B2 (en) 2002-04-19 2016-01-05 Sanofi-Aventis Deutschland Gmbh Body fluid sampling module with a continuous compression tissue interface surface
ES2357887T3 (en) 2001-06-12 2011-05-03 Pelikan Technologies Inc. APPARATUS FOR IMPROVING THE BLOOD OBTAINING SUCCESS RATE FROM A CAPILLARY PUNCTURE.
WO2002100254A2 (en) 2001-06-12 2002-12-19 Pelikan Technologies, Inc. Method and apparatus for lancet launching device integrated onto a blood-sampling cartridge
US7344507B2 (en) 2002-04-19 2008-03-18 Pelikan Technologies, Inc. Method and apparatus for lancet actuation
EP1395185B1 (en) 2001-06-12 2010-10-27 Pelikan Technologies Inc. Electric lancet actuator
US9427532B2 (en) 2001-06-12 2016-08-30 Sanofi-Aventis Deutschland Gmbh Tissue penetration device
US7981056B2 (en) 2002-04-19 2011-07-19 Pelikan Technologies, Inc. Methods and apparatus for lancet actuation
CA2448902C (en) 2001-06-12 2010-09-07 Pelikan Technologies, Inc. Self optimizing lancing device with adaptation means to temporal variations in cutaneous properties
US7682318B2 (en) 2001-06-12 2010-03-23 Pelikan Technologies, Inc. Blood sampling apparatus and method
US9795747B2 (en) 2010-06-02 2017-10-24 Sanofi-Aventis Deutschland Gmbh Methods and apparatus for lancet actuation
US8337419B2 (en) 2002-04-19 2012-12-25 Sanofi-Aventis Deutschland Gmbh Tissue penetration device
US7041068B2 (en) 2001-06-12 2006-05-09 Pelikan Technologies, Inc. Sampling module device and method
CN1282870C (en) * 2001-09-11 2006-11-01 爱科来株式会社 Measuring instrument, installation body, and density measurer
CA2419200C (en) * 2002-03-05 2015-06-30 Bayer Healthcare Llc Fluid collection apparatus having an integrated lance and reaction area
US7232451B2 (en) 2002-04-19 2007-06-19 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US8784335B2 (en) 2002-04-19 2014-07-22 Sanofi-Aventis Deutschland Gmbh Body fluid sampling device with a capacitive sensor
US9795334B2 (en) 2002-04-19 2017-10-24 Sanofi-Aventis Deutschland Gmbh Method and apparatus for penetrating tissue
US8221334B2 (en) 2002-04-19 2012-07-17 Sanofi-Aventis Deutschland Gmbh Method and apparatus for penetrating tissue
US7371247B2 (en) 2002-04-19 2008-05-13 Pelikan Technologies, Inc Method and apparatus for penetrating tissue
US9248267B2 (en) 2002-04-19 2016-02-02 Sanofi-Aventis Deustchland Gmbh Tissue penetration device
US7297122B2 (en) 2002-04-19 2007-11-20 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7291117B2 (en) 2002-04-19 2007-11-06 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7229458B2 (en) 2002-04-19 2007-06-12 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7331931B2 (en) 2002-04-19 2008-02-19 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7674232B2 (en) 2002-04-19 2010-03-09 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7892183B2 (en) 2002-04-19 2011-02-22 Pelikan Technologies, Inc. Method and apparatus for body fluid sampling and analyte sensing
US7976476B2 (en) 2002-04-19 2011-07-12 Pelikan Technologies, Inc. Device and method for variable speed lancet
US7547287B2 (en) 2002-04-19 2009-06-16 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7648468B2 (en) 2002-04-19 2010-01-19 Pelikon Technologies, Inc. Method and apparatus for penetrating tissue
US7491178B2 (en) 2002-04-19 2009-02-17 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US9314194B2 (en) 2002-04-19 2016-04-19 Sanofi-Aventis Deutschland Gmbh Tissue penetration device
US7198606B2 (en) 2002-04-19 2007-04-03 Pelikan Technologies, Inc. Method and apparatus for a multi-use body fluid sampling device with analyte sensing
US8702624B2 (en) 2006-09-29 2014-04-22 Sanofi-Aventis Deutschland Gmbh Analyte measurement device with a single shot actuator
US8579831B2 (en) 2002-04-19 2013-11-12 Sanofi-Aventis Deutschland Gmbh Method and apparatus for penetrating tissue
US7909778B2 (en) 2002-04-19 2011-03-22 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7901362B2 (en) 2002-04-19 2011-03-08 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US8267870B2 (en) 2002-04-19 2012-09-18 Sanofi-Aventis Deutschland Gmbh Method and apparatus for body fluid sampling with hybrid actuation
US7717863B2 (en) 2002-04-19 2010-05-18 Pelikan Technologies, Inc. Method and apparatus for penetrating tissue
US7303726B2 (en) 2002-05-09 2007-12-04 Lifescan, Inc. Minimal procedure analyte test system
US7343188B2 (en) 2002-05-09 2008-03-11 Lifescan, Inc. Devices and methods for accessing and analyzing physiological fluid
US20030212344A1 (en) * 2002-05-09 2003-11-13 Vadim Yuzhakov Physiological sample collection devices and methods of using the same
US7736309B2 (en) 2002-09-27 2010-06-15 Medtronic Minimed, Inc. Implantable sensor method and system
JP2006512110A (en) * 2002-10-30 2006-04-13 ライフスキャン・インコーポレイテッド An improved method of lancing the skin for blood extraction
US8672852B2 (en) 2002-12-13 2014-03-18 Intercure Ltd. Apparatus and method for beneficial modification of biorhythmic activity
US7291310B2 (en) * 2002-12-17 2007-11-06 The Regents Of The University Of Michigan Microsystem for determining clotting time of blood and low-cost, single-use device for use therein
EP1479344A1 (en) * 2003-05-22 2004-11-24 Roche Diagnostics GmbH Direct monitoring of interstitial fluid composition
AU2003302263A1 (en) * 2002-12-26 2004-07-29 Meso Scale Technologies, Llc. Assay cartridges and methods of using the same
US8574895B2 (en) 2002-12-30 2013-11-05 Sanofi-Aventis Deutschland Gmbh Method and apparatus using optical techniques to measure analyte levels
WO2004093641A2 (en) * 2003-04-16 2004-11-04 Drexel University Acoustic blood analyzer for assessing blood properties
US7258673B2 (en) 2003-06-06 2007-08-21 Lifescan, Inc Devices, systems and methods for extracting bodily fluid and monitoring an analyte therein
ES2490740T3 (en) 2003-06-06 2014-09-04 Sanofi-Aventis Deutschland Gmbh Apparatus for blood fluid sampling and analyte detection
US20040253736A1 (en) * 2003-06-06 2004-12-16 Phil Stout Analytical device with prediction module and related methods
WO2006001797A1 (en) 2004-06-14 2006-01-05 Pelikan Technologies, Inc. Low pain penetrating
WO2004112602A1 (en) 2003-06-13 2004-12-29 Pelikan Technologies, Inc. Method and apparatus for a point of care device
US8148164B2 (en) 2003-06-20 2012-04-03 Roche Diagnostics Operations, Inc. System and method for determining the concentration of an analyte in a sample fluid
US7452457B2 (en) 2003-06-20 2008-11-18 Roche Diagnostics Operations, Inc. System and method for analyte measurement using dose sufficiency electrodes
US8071030B2 (en) 2003-06-20 2011-12-06 Roche Diagnostics Operations, Inc. Test strip with flared sample receiving chamber
ES2683013T3 (en) 2003-06-20 2018-09-24 F. Hoffmann-La Roche Ag Reagent band for test strip
US8058077B2 (en) 2003-06-20 2011-11-15 Roche Diagnostics Operations, Inc. Method for coding information on a biosensor test strip
DE10345663A1 (en) * 2003-06-27 2005-01-20 Senslab-Gesellschaft Zur Entwicklung Und Herstellung Bioelektrochemischer Sensoren Mbh Diagnostic or analytical disposable with integrated lancet
US7223248B2 (en) 2003-08-13 2007-05-29 Lifescan, Inc. Packaged medical device with a deployable dermal tissue penetration member
US7722817B2 (en) 2003-08-28 2010-05-25 Epocal Inc. Lateral flow diagnostic devices with instrument controlled fluidics
JP4359595B2 (en) 2003-09-02 2009-11-04 広司 早出 Glucose sensor and glucose concentration measuring device
US7617932B2 (en) 2003-09-19 2009-11-17 Diabetes Diagnostics, Inc. Medical device package, kit and associated methods
EP1671096A4 (en) 2003-09-29 2009-09-16 Pelikan Technologies Inc Method and apparatus for an improved sample capture device
GB2406794B (en) 2003-10-06 2008-03-05 Inverness Medical Ltd A lancing device using a piezoelectric actuator
EP1680014A4 (en) 2003-10-14 2009-01-21 Pelikan Technologies Inc Method and apparatus for a variable user interface
US7655119B2 (en) 2003-10-31 2010-02-02 Lifescan Scotland Limited Meter for use in an improved method of reducing interferences in an electrochemical sensor using two different applied potentials
CA2544424A1 (en) 2003-10-31 2005-05-19 Lifescan Scotland Limited Electrochemical test strip for reducing the effect of direct interference current
US7713229B2 (en) 2003-11-06 2010-05-11 Lifescan, Inc. Drug delivery pen with event notification means
US7474638B2 (en) 2003-12-15 2009-01-06 Agilent Technologies, Inc. Method and system for distributed baseband measurements
US8306592B2 (en) 2003-12-19 2012-11-06 Olympus Corporation Capsule medical device
US7822454B1 (en) 2005-01-03 2010-10-26 Pelikan Technologies, Inc. Fluid sampling device with improved analyte detecting member configuration
WO2005065414A2 (en) 2003-12-31 2005-07-21 Pelikan Technologies, Inc. Method and apparatus for improving fluidic flow and sample capture
DE102004007274A1 (en) 2004-02-14 2005-09-15 Roche Diagnostics Gmbh Test element for a human or animal fluid sample, e.g. to test for glucose, has a sampling surface and an actuator field to pull the sample to a test field
US7439069B2 (en) * 2004-02-27 2008-10-21 Nippoldt Douglas D Blood coagulation test cartridge, system, and method
US7819822B2 (en) 2004-03-06 2010-10-26 Roche Diagnostics Operations, Inc. Body fluid sampling device
PL1725168T3 (en) * 2004-03-06 2016-10-31 Body fluid sampling device
US20050266571A1 (en) * 2004-03-26 2005-12-01 Phil Stout Method for feedback control of a microfluidic system
US6990849B2 (en) * 2004-03-26 2006-01-31 Lifescan, Inc. Microfluidic analytical system with position electrodes
US7516845B2 (en) 2004-03-31 2009-04-14 Inverness Medical Limited Medical device package with deformable projections
EP1737345A1 (en) 2004-04-15 2007-01-03 Roche Diagnostics GmbH Integrated spot monitoring device with fluid sensor
US8828203B2 (en) 2004-05-20 2014-09-09 Sanofi-Aventis Deutschland Gmbh Printable hydrogels for biosensors
JP4555609B2 (en) * 2004-05-21 2010-10-06 東亜ディーケーケー株式会社 Gas-liquid reaction unit and analyzer
JP4555610B2 (en) * 2004-05-21 2010-10-06 東亜ディーケーケー株式会社 Gas-liquid reaction unit and analyzer
US9775553B2 (en) 2004-06-03 2017-10-03 Sanofi-Aventis Deutschland Gmbh Method and apparatus for a fluid sampling device
WO2005120365A1 (en) 2004-06-03 2005-12-22 Pelikan Technologies, Inc. Method and apparatus for a fluid sampling device
US7569126B2 (en) 2004-06-18 2009-08-04 Roche Diagnostics Operations, Inc. System and method for quality assurance of a biosensor test strip
US20060000549A1 (en) 2004-06-29 2006-01-05 Lang David K Method of manufacturing integrated biosensors
IL169171A0 (en) 2004-06-29 2007-07-04 Lifescan Scotland Ltd Manufacturing apparatus for the packaging of medical devices including integrated lancets
US7051495B2 (en) 2004-06-29 2006-05-30 Lifescan Scotland Limited Method of packaging integrated biosensors
US20060006574A1 (en) 2004-06-29 2006-01-12 Lang David K Apparatus for the manufacture of medical devices
US20060002817A1 (en) 2004-06-30 2006-01-05 Sebastian Bohm Flow modulation devices
US20060036187A1 (en) 2004-06-30 2006-02-16 Hester Vos Devices, systems and methods for extracting bodily fluid and monitoring an analyte therein
US20060001538A1 (en) 2004-06-30 2006-01-05 Ulrich Kraft Methods of monitoring the concentration of an analyte
US20060000709A1 (en) 2004-06-30 2006-01-05 Sebastian Bohm Methods for modulation of flow in a flow pathway
JP2008504881A (en) * 2004-07-01 2008-02-21 ヴィヴォメディカル, インコーポレイテッド Noninvasive glucose measurement
US20070027383A1 (en) * 2004-07-01 2007-02-01 Peyser Thomas A Patches, systems, and methods for non-invasive glucose measurement
ES2463818T3 (en) 2004-08-16 2014-05-29 Functional Microstructures Limited Device to be applied to a biological barrier
US7402616B2 (en) 2004-09-30 2008-07-22 Lifescan, Inc. Fusible conductive ink for use in manufacturing microfluidic analytical systems
WO2006050485A1 (en) 2004-11-02 2006-05-11 Lifescan, Inc. Method and computer program for pattern analysis and reporting of chronic disease state management data
EP1654985A1 (en) * 2004-11-09 2006-05-10 F. Hoffmann-La Roche Ag Sampling device for sample liquid
US8652831B2 (en) 2004-12-30 2014-02-18 Sanofi-Aventis Deutschland Gmbh Method and apparatus for analyte measurement test time
EP1759633A1 (en) * 2005-09-01 2007-03-07 F.Hoffmann-La Roche Ag Device for sampling bodily fluids and its fabrication method
BRPI0617460B8 (en) 2005-10-18 2021-07-27 Fujimori Kogyo Co device that monitors thrombus formation by flowing anticoagulated blood through a channel that simulates a blood vessel while delivering an anticoagulation treatment or that promotes blood clotting; and, in vitro method for monitoring thrombus formation
CN101305279A (en) * 2005-11-09 2008-11-12 皇家飞利浦电子股份有限公司 Device for testing a fluid
CN101410049A (en) * 2006-01-31 2009-04-15 芝加哥大学 Method and apparatus for assaying blood clotting
US20090093735A1 (en) * 2006-03-29 2009-04-09 Stephan Korner Test unit and test system for analyzing body fluids
US7837941B2 (en) * 2006-04-07 2010-11-23 Agamatrix, Inc. Method and apparatus for monitoring alteration of flow characteristics in a liquid sample
US20070285651A1 (en) * 2006-04-24 2007-12-13 Cantor Thomas L Methods and devices for measuring sample coagulation
HUE028693T2 (en) * 2006-07-17 2016-12-28 Universal Biosensors Pty Ltd Electrochemical detection of magnetic particle mobility
US7674616B2 (en) * 2006-09-14 2010-03-09 Hemosense, Inc. Device and method for measuring properties of a sample
EP2957908A1 (en) 2006-10-05 2015-12-23 Lifescan Scotland Limited Methods for determining an analyte concentration using signal processing algorithms
DE502006003678D1 (en) * 2006-10-14 2009-06-18 Roche Diagnostics Gmbh Lancet with capillary channel
JP2008185564A (en) * 2007-01-31 2008-08-14 Fujimori Kogyo Co Ltd Inspection method and device for blood coagulation ability
JP2010523227A (en) * 2007-04-04 2010-07-15 アイセンス コーポレーション Analyte sensing device having one or more sensing electrodes
US20080297169A1 (en) * 2007-05-31 2008-12-04 Greenquist Alfred C Particle Fraction Determination of A Sample
US20090025459A1 (en) * 2007-07-23 2009-01-29 Cardiac Pacemakers, Inc. Implantable viscosity monitoring device and method therefor
KR100885074B1 (en) * 2007-07-26 2009-02-25 주식회사 아이센스 Microfluidic sensor complex structures
WO2009048673A2 (en) * 2007-07-26 2009-04-16 University Of Chicago Stochastic confinement to detect, manipulate, and utilize molecules and organisms
EP2040073A1 (en) * 2007-09-20 2009-03-25 Iline Microsystems, S.L. Microfluidic device and method for fluid clotting time determination
EP2201136B1 (en) 2007-10-01 2017-12-06 Nabsys 2.0 LLC Nanopore sequencing by hybridization of probes to form ternary complexes and variable range alignment
EP2053387A1 (en) * 2007-10-22 2009-04-29 Centre National de la Recherche Scientifique Test device for platelet aggregation detection
US7766846B2 (en) 2008-01-28 2010-08-03 Roche Diagnostics Operations, Inc. Rapid blood expression and sampling
US20090247855A1 (en) * 2008-03-28 2009-10-01 Dexcom, Inc. Polymer membranes for continuous analyte sensors
WO2009126900A1 (en) 2008-04-11 2009-10-15 Pelikan Technologies, Inc. Method and apparatus for analyte detecting device
DE102008022884A1 (en) * 2008-05-08 2009-11-12 Zander, Rolf, Prof. Dr.Med. Device and method for blood coagulation diagnostics
WO2009149257A1 (en) 2008-06-04 2009-12-10 The University Of Chicago The chemistrode: a plug-based microfluidic device and method for stimulation and sampling with high temporal, spatial, and chemical resolution
ATE481643T1 (en) * 2008-06-05 2010-10-15 Hoffmann La Roche METHOD FOR DETERMINING AN ANALYTE IN A LIQUID SAMPLE AND ANALYZING DEVICE
KR100976149B1 (en) 2008-06-25 2010-08-16 (주)바이오버드 Methods for Preparing Nano-Patterned Epoxy Templates
US20100028207A1 (en) * 2008-07-16 2010-02-04 International Technidyne Corporation Cuvette-based apparatus for blood coagulation measurement and testing
US20110151500A1 (en) * 2008-08-11 2011-06-23 Kazuya Hosokawa Blood-Platelet Test Method and Blood-Platelet Test Device
US9650668B2 (en) 2008-09-03 2017-05-16 Nabsys 2.0 Llc Use of longitudinally displaced nanoscale electrodes for voltage sensing of biomolecules and other analytes in fluidic channels
US8262879B2 (en) 2008-09-03 2012-09-11 Nabsys, Inc. Devices and methods for determining the length of biopolymers and distances between probes bound thereto
US8882980B2 (en) 2008-09-03 2014-11-11 Nabsys, Inc. Use of longitudinally displaced nanoscale electrodes for voltage sensing of biomolecules and other analytes in fluidic channels
WO2010070461A1 (en) * 2008-12-16 2010-06-24 Koninklijke Philips Electronics N. V. Hydrophobic valve
US8448499B2 (en) 2008-12-23 2013-05-28 C A Casyso Ag Cartridge device for a measuring system for measuring viscoelastic characteristics of a sample liquid, a corresponding measuring system, and a corresponding method
JP5691168B2 (en) * 2009-01-08 2015-04-01 ソニー株式会社 Blood coagulation system analyzer, blood coagulation system analysis method and program
JP6052267B2 (en) * 2009-01-08 2016-12-27 ソニー株式会社 Blood coagulation system analyzer, blood coagulation system analysis method and program
US9375169B2 (en) 2009-01-30 2016-06-28 Sanofi-Aventis Deutschland Gmbh Cam drive for managing disposable penetrating member actions with a single motor and motor and control system
US8696917B2 (en) * 2009-02-09 2014-04-15 Edwards Lifesciences Corporation Analyte sensor and fabrication methods
US10196700B2 (en) 2009-03-24 2019-02-05 University Of Chicago Multivolume devices, kits and related methods for quantification and detection of nucleic acids and other analytes
US9447461B2 (en) 2009-03-24 2016-09-20 California Institute Of Technology Analysis devices, kits, and related methods for digital quantification of nucleic acids and other analytes
KR101796906B1 (en) 2009-03-24 2017-11-10 유니버시티 오브 시카고 Method for carrying out a reaction
US9464319B2 (en) 2009-03-24 2016-10-11 California Institute Of Technology Multivolume devices, kits and related methods for quantification of nucleic acids and other analytes
CN102448475A (en) 2009-04-09 2012-05-09 恩特格利昂公司 Spray-dried blood products and methods of making same
JP5816613B2 (en) 2009-04-23 2015-11-18 ダブリン シティ ユニバーシティ Lateral flow analyzer and method for monitoring coagulation
WO2010138136A1 (en) * 2009-05-28 2010-12-02 Nabsys, Inc. Devices and methods for determining the length of biopolymers and distances between probes bound thereto
WO2011048200A2 (en) * 2009-10-22 2011-04-28 Roche Diagnostics Gmbh Micro-capillary system having increased sample volume
CN102648015B (en) * 2009-10-30 2016-10-19 第七感生物系统有限公司 It is applied to less device, modular system and the using method thereof of skin
US10739358B2 (en) 2009-12-18 2020-08-11 Entegrion, Inc. Portable coagulation monitoring devices, systems, and methods
ES2543099T3 (en) 2009-12-18 2015-08-14 Entegrion, Inc. Portable coagulation monitoring device and method for assessing coagulation response
US20110165037A1 (en) * 2010-01-07 2011-07-07 Ismagilov Rustem F Interfaces that eliminate non-specific adsorption, and introduce specific interactions
EP3243435A1 (en) * 2010-01-13 2017-11-15 Seventh Sense Biosystems, Inc. Sampling device interfaces
DE102010000843A1 (en) * 2010-01-13 2011-07-14 Robert Bosch GmbH, 70469 Porous micro-needle assembly glucose sensor device, corresponding manufacturing method and glucose measurement method
EP2535721B1 (en) 2010-02-10 2017-04-19 Fujimori Kogyo Co., Ltd. Microchip for platelet examination and platelet examination device using same
US8999124B2 (en) * 2010-03-03 2015-04-07 Nippon Kayaku Kabushiki Kaisha Detection device
TWI461689B (en) * 2010-04-01 2014-11-21 Univ Nat Cheng Kung Biomedical chip comprising dry powder reagent for blood coagulation test
WO2011127436A2 (en) 2010-04-08 2011-10-13 Hemosonics, Llc Hemostatic parameter display
US8965476B2 (en) 2010-04-16 2015-02-24 Sanofi-Aventis Deutschland Gmbh Tissue penetration device
JP5723680B2 (en) * 2010-06-02 2015-05-27 積水化学工業株式会社 Method for measuring substances
TWI472766B (en) 2010-06-09 2015-02-11 Apex Biotechnology Corp Device and method for measuring prothrombin time and hematocrit by analyzing change in reactance in a sample
KR101221296B1 (en) 2010-08-18 2013-01-10 연세대학교 산학협력단 Blood Coagulation Measuring Device and Method of Synthesizing the Same
JP5549484B2 (en) * 2010-09-01 2014-07-16 ソニー株式会社 Sample cartridge and apparatus for measuring electrical properties of liquid samples
US8715933B2 (en) 2010-09-27 2014-05-06 Nabsys, Inc. Assay methods using nicking endonucleases
JP5998148B2 (en) 2010-11-16 2016-09-28 ナブシス 2.0 エルエルシー Method for sequencing biomolecules by detecting the relative position of hybridized probes
EP2676143B1 (en) 2011-02-15 2023-11-01 Hemosonics, Llc Characterization of blood hemostasis and oxygen transport parameters
BR112013020675B1 (en) 2011-02-15 2022-01-25 Hemosonics, Llc Devices and method for hemostasis assessment
DE102011006349A1 (en) * 2011-03-29 2012-10-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device and method for detecting, measuring and / or influencing the clotting of blood systems
US20120294767A1 (en) 2011-05-19 2012-11-22 Hemosonics Llc Portable hemostasis analyzer
CN102818822B (en) * 2011-06-09 2015-08-12 五鼎生物技术股份有限公司 To utilize in analyzing samples reactance change to measure diagnostic device and the method for prothrombin time and hematocrit ratio (HCT%)
WO2013020045A2 (en) * 2011-08-03 2013-02-07 Coentre Ventures Llc Cloud calibration of a test device
KR101193566B1 (en) * 2011-08-10 2012-10-22 고려대학교 산학협력단 Apparatus of platelet multi-function analysis based on micro-chip
KR101363812B1 (en) * 2011-12-27 2014-02-20 고려대학교 산학협력단 Bleeding time measurement apparatus and method by using blood migration ratio
TWI498558B (en) * 2012-01-20 2015-09-01 Univ Nat Cheng Kung Device for detecting blood coagulation and manufacturing method thereof
EP2834007B1 (en) * 2012-04-04 2019-06-26 University of Cincinnati Device and method for sweat collection
ITUD20120079A1 (en) * 2012-05-04 2013-11-05 Ct Di Riferimento Oncologico METHOD FOR ANALYSIS OF THE AGGREGATE FORMATION PROCESS IN A BIOLOGICAL AND RELATIVE FLUID ANALYSIS EQUIPMENT
US20140317954A1 (en) * 2012-05-10 2014-10-30 Norgren Automation Solutions, Llc Method and apparatus for automatically drying wet floors
CA2878509C (en) * 2012-07-16 2020-04-28 Genefluidics, Inc. Sample dependent selection of parameters for use in electrokinetic treatment of the sample
WO2014018777A2 (en) 2012-07-25 2014-01-30 Biogen Idec Ma Inc. Blood factor monitoring assay and uses thereof
EP2880621A4 (en) * 2012-08-01 2016-03-23 Yofimeter Llc User interface for analyte monitoring systems
WO2014025881A2 (en) * 2012-08-07 2014-02-13 Old Dominion University Reasearch Foundation A polymer-based microfluidic resistive sensor for detecting distributed loads, methods, and processes for fabricating the same
JP2014115256A (en) * 2012-12-12 2014-06-26 Sony Corp Container for electrical measurement, apparatus for electrical measurement, and method for electrical measurement
US9914966B1 (en) 2012-12-20 2018-03-13 Nabsys 2.0 Llc Apparatus and methods for analysis of biomolecules using high frequency alternating current excitation
EP2956550B1 (en) 2013-01-18 2020-04-08 Nabsys 2.0 LLC Enhanced probe binding
ES2680932T3 (en) 2013-05-14 2018-09-11 Struszym, S.L. Methods for determining coagulation factor activities
DE102013017317A1 (en) 2013-10-18 2015-04-23 Endress + Hauser Flowtec Ag Measuring arrangement with a carrier element and a sensor
EP3069135A4 (en) * 2013-11-15 2017-08-30 Entegrion, Inc. Portable coagulation monitoring devices, systems, and methods
US20150140671A1 (en) * 2013-11-18 2015-05-21 Johnson Electric S.A. Method and system for assembling a microfluidic sensor
JP6332786B2 (en) * 2014-02-14 2018-05-30 株式会社ライトニックス Medical needle and puncture device
EP3111230B1 (en) 2014-02-24 2021-02-24 Mocon, Inc. Instrument and method for target-analyte permeation testing with sensor feed line conditioning system
CN103919616B (en) * 2014-05-06 2016-03-23 苏州大学 A kind of device for artificial organ surface Hemostasis examination and detection method
EP2974656A1 (en) * 2014-07-14 2016-01-20 Universität Zürich Device for measuring the concentration of an analyte in the blood or tissue of an animal or a human, particularly a premature infant, in a self-calibrating manner
CN107076733B (en) 2014-09-09 2021-04-30 佩罗斯芬尔技术有限公司 Universal coagulation assay based on microfluidic chip
US9561184B2 (en) 2014-09-19 2017-02-07 Velico Medical, Inc. Methods and systems for multi-stage drying of plasma
US10175225B2 (en) 2014-09-29 2019-01-08 C A Casyso Ag Blood testing system and method
JP6443954B2 (en) * 2015-01-30 2018-12-26 ヒューレット−パッカード デベロップメント カンパニー エル.ピー.Hewlett‐Packard Development Company, L.P. Microfluidic chip for coagulation detection
US10197522B2 (en) 2015-03-18 2019-02-05 Materion Corporation Multilayer constructs for metabolite strips providing inert surface and mechanical advantage
US10378098B2 (en) 2015-03-18 2019-08-13 Materion Corporation Methods for optimized production of multilayer metal/transparent conducting oxide (TCO) constructs
US20180353748A1 (en) * 2015-07-24 2018-12-13 University Of Cincinnati Reverse iontophoresis biosensing with reduced sample volumes
CN105628747B (en) * 2015-12-18 2019-03-22 上海奥普生物医药有限公司 Clotting time device for testing and analyzing and its method for testing and analyzing
KR20180103944A (en) * 2016-01-15 2018-09-19 케이스 웨스턴 리저브 유니버시티 Dielectric Sensing for Sample Characterization
US11112400B2 (en) * 2016-01-16 2021-09-07 Hewlett-Packard Development Company, L.P. Blood characteristic measurement
US11073490B2 (en) * 2016-02-05 2021-07-27 Sensor Health S.r.l. Measuring device for blood and/or liquid interstitial analytes
JP6070892B2 (en) * 2016-08-08 2017-02-01 ソニー株式会社 Electrical measurement container, electrical measurement device, and electrical measurement method
CN106153439B (en) * 2016-08-16 2019-02-01 中国科学院苏州生物医学工程技术研究所 Hemostasis detestion device
US10473674B2 (en) * 2016-08-31 2019-11-12 C A Casyso Gmbh Controlled blood delivery to mixing chamber of a blood testing cartridge
KR101910932B1 (en) * 2016-08-31 2018-10-23 이오플로우(주) Electoosmotic pump
US20180164281A1 (en) * 2016-12-13 2018-06-14 Dbs System Sa Device and Method for Detecting the Deposition of a Biological Liquid Sample on a Substrate
JP6414234B2 (en) * 2017-01-05 2018-10-31 ソニー株式会社 Electrical measurement container, electrical measurement device, and electrical measurement method
US11650196B2 (en) 2017-01-06 2023-05-16 Sony Corporation Blood coagulation system analysis apparatus, blood coagulation system analysis system, blood coagulation system analysis method, blood coagulation system analysis program, blood loss prediction apparatus, blood loss prediction system, blood loss prediction method, and blood loss prediction program
CN115561306A (en) 2017-04-20 2023-01-03 海默索尼克斯有限公司 Disposable system for hemostatic function analysis
US11865535B2 (en) 2017-04-20 2024-01-09 Hewlett-Packard Development Company, L.P. Microfluidic reaction system
US11278887B2 (en) 2017-04-21 2022-03-22 Hewlett-Packard Development Company, L.P. Microfluidic chip
WO2018194651A1 (en) 2017-04-21 2018-10-25 Hewlett-Packard Development Company, Coplanar fluidic interconnect
WO2018194648A1 (en) 2017-04-21 2018-10-25 Hewlett-Packard Development Company Coplanar microfluidic manipulation
US11278892B2 (en) 2017-04-21 2022-03-22 Hewlett-Packard Development Company, L.P. Chip to chip fluidic interconnect
CN107144697A (en) * 2017-05-15 2017-09-08 银翮蔚蓝健康产业研究院(南京)有限公司 Clotting time monitoring device and method
CN107036738A (en) * 2017-06-01 2017-08-11 黄昱 A kind of blood platelet Micro-force sensor of the elastic film variable capacitance based on nanometer technique
US11579116B2 (en) 2017-06-11 2023-02-14 Peter Seitz Chip-based multi-channel electrochemical transducer and method of use thereof
EP3664699A4 (en) * 2017-08-13 2021-06-30 Mao Foodtech Ltd. A system, device and method for identifying and monitoring breast milk composition
WO2019190596A1 (en) * 2017-10-20 2019-10-03 Rutgers, The State University Of New Jersey Transcutaneous wearable apparatus for continuous monitoring of biomarkers in blood
CN114414790A (en) * 2017-11-28 2022-04-29 北京碧澄生物科技有限公司 Device and method for detecting liquid phase change
CN111491562A (en) * 2017-12-15 2020-08-04 皇家飞利浦有限公司 Wearable or insertable device with microneedles comprising mechanically responsive material
SE541788C2 (en) * 2017-12-22 2019-12-17 Brighter Ab Publ Skin patch for diagnosis comprising an evaporation layer
GB2569956B (en) * 2018-01-03 2021-07-14 Bae Systems Plc Viscometer device
CN108398470B (en) * 2018-04-13 2024-01-30 广州万孚生物技术股份有限公司 Biosensor for measuring blood activation clotting time and manufacturing method thereof
CN110755088B (en) * 2018-07-27 2022-07-26 华广生技股份有限公司 Elastic physiological paster
FR3084578B1 (en) * 2018-08-03 2024-01-12 Pkvitality MANAGEMENT OF MICRONEEDLE INVESTMENT
JP6791220B2 (en) * 2018-09-18 2020-11-25 ソニー株式会社 Electrical measuring container, electrical measuring device and electrical measuring method
CN113167795A (en) * 2018-12-02 2021-07-23 聚合物技术系统公司 System and method for a combined strip detection and heating system in an electrochemical test strip
CN109632571A (en) * 2019-01-29 2019-04-16 深圳市华星光电半导体显示技术有限公司 Solution level measuring device and method
CN110057890B (en) * 2019-03-26 2021-07-30 中国科学院苏州生物医学工程技术研究所 Blood coagulation detection chip and electrochemical sensor
CN111803204B (en) * 2019-07-08 2022-07-01 昆山雷盛医疗科技有限公司 Radio frequency thermal ablation system and control method thereof
US20210016275A1 (en) * 2019-07-19 2021-01-21 Micropoint Bioscience, Inc. Micro-assay cartridges
WO2021124165A1 (en) * 2019-12-20 2021-06-24 3M Innovative Properties Company Multilayer adhesive fluid collection articles including capillary channels
US20220003731A1 (en) * 2020-07-06 2022-01-06 Florida Atlantic University Board Of Trustees Vascular occlusion testing device
WO2022031558A1 (en) * 2020-08-03 2022-02-10 The Regents Of The University Of Colorado, A Body Corporate Method to sense the presence and quantities of microbes through the use of transient sensing materials
CN112842333A (en) * 2020-12-31 2021-05-28 华中科技大学 Visual glucose concentration detection microneedle patch, preparation method and application
US20220330861A1 (en) * 2021-04-14 2022-10-20 Satio, Inc. Self-Contained Dermal Patch for Detection of Physiological Analytes
CN113702649B (en) * 2021-08-25 2022-09-02 常州工程职业技术学院 Microfluid biochip for measuring blood coagulation time
US11877848B2 (en) 2021-11-08 2024-01-23 Satio, Inc. Dermal patch for collecting a physiological sample
US11510602B1 (en) 2021-11-08 2022-11-29 Satio, Inc. Dermal patch for collecting a physiological sample
US11841189B1 (en) 2022-09-15 2023-12-12 Velico Medical, Inc. Disposable for a spray drying system

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699437A (en) * 1968-09-27 1972-10-17 Amiram Ur Blood coagulation detection method and apparatus
US4758884A (en) * 1986-05-19 1988-07-19 Kaiser Electronics Electronically switched field sequential color video display having parallel color inputs
US5039617A (en) * 1989-04-20 1991-08-13 Biotrack, Inc. Capillary flow device and method for measuring activated partial thromboplastin time
US5300779A (en) * 1985-08-05 1994-04-05 Biotrack, Inc. Capillary flow device
US5328847A (en) * 1990-02-20 1994-07-12 Case George D Thin membrane sensor with biochemical switch
US5344754A (en) * 1993-01-13 1994-09-06 Avocet Medical, Inc. Assay timed by electrical resistance change and test strip
US5534226A (en) * 1994-10-21 1996-07-09 International Technidyne Corporation Portable test apparatus and associated method of performing a blood coagulation test
US5577499A (en) * 1994-10-03 1996-11-26 Teves; Leonides Y. Blood analyzer
US5591139A (en) * 1994-06-06 1997-01-07 The Regents Of The University Of California IC-processed microneedles
US6084880A (en) * 1994-09-12 2000-07-04 Efficient Networks, Inc. Asynchronous transfer mode adapter for desktop applications
US6090323A (en) * 1997-10-30 2000-07-18 Navitas Co., Ltd. Method for manufacturing card product
US6312393B1 (en) * 1996-09-04 2001-11-06 Marcio Marc A. M. Abreu Contact device for placement in direct apposition to the conjunctive of the eye
US6540675B2 (en) * 2000-06-27 2003-04-01 Rosedale Medical, Inc. Analyte monitor
US6887202B2 (en) * 2000-06-01 2005-05-03 Science Applications International Corporation Systems and methods for monitoring health and delivering drugs transdermally
US7344499B1 (en) * 1998-06-10 2008-03-18 Georgia Tech Research Corporation Microneedle device for extraction and sensing of bodily fluids

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4756884A (en) * 1985-08-05 1988-07-12 Biotrack, Inc. Capillary flow device
US4873993A (en) * 1986-07-22 1989-10-17 Personal Diagnostics, Inc. Cuvette
CN87211253U (en) * 1987-10-06 1988-06-08 上海市长海医院 Micro-computer monitering system for sphygmogram hemodynamics
AT393213B (en) * 1989-02-08 1991-09-10 Avl Verbrennungskraft Messtech DEVICE FOR DETERMINING AT LEAST ONE MEDICAL MEASURING SIZE
US5109850A (en) * 1990-02-09 1992-05-05 Massachusetts Institute Of Technology Automatic blood monitoring for medication delivery method and apparatus
US6156270A (en) * 1992-05-21 2000-12-05 Biosite Diagnostics, Inc. Diagnostic devices and apparatus for the controlled movement of reagents without membranes
GB9320850D0 (en) * 1993-10-09 1993-12-01 Terwee Thomas H M Monitoring the concentration of a substance or a group of substances in a body fluid of a human or an animal
US5582184A (en) 1993-10-13 1996-12-10 Integ Incorporated Interstitial fluid collection and constituent measurement
US5879367A (en) 1995-09-08 1999-03-09 Integ, Inc. Enhanced interstitial fluid collection
US5711861A (en) * 1995-11-22 1998-01-27 Ward; W. Kenneth Device for monitoring changes in analyte concentration
US5708247A (en) 1996-02-14 1998-01-13 Selfcare, Inc. Disposable glucose test strips, and methods and compositions for making same
US5801057A (en) 1996-03-22 1998-09-01 Smart; Wilson H. Microsampling device and method of construction
ATE227844T1 (en) * 1997-02-06 2002-11-15 Therasense Inc SMALL VOLUME SENSOR FOR IN-VITRO DETERMINATION
US6558351B1 (en) * 1999-06-03 2003-05-06 Medtronic Minimed, Inc. Closed loop system for controlling insulin infusion
US6046051A (en) * 1997-06-27 2000-04-04 Hemosense, Inc. Method and device for measuring blood coagulation or lysis by viscosity changes
DK1037686T3 (en) 1997-12-11 2006-01-02 Alza Corp Apparatus for enhancing transdermal flow of agents
EP1059882B1 (en) * 1998-03-06 2007-10-17 SPECTRX, Inc. Integrated tissue poration, fluid harvesting and analysis device
JP4027596B2 (en) 1998-03-19 2007-12-26 オージェニクス バイオセンサーズ リミテッド Device for determining blood clotting by capacitance or resistance
JP2004510453A (en) 1998-07-21 2004-04-08 スペクトルクス,インコーポレイティド Systems and methods for continuous analyte monitoring
DE19848112C2 (en) 1998-10-19 2001-12-13 Meinhard Knoll Minimally invasive sensor system
CA2376128C (en) * 1999-06-04 2009-01-06 Georgia Tech Research Corporation Devices and methods for enhanced microneedle penetration of biological barriers
US6379324B1 (en) * 1999-06-09 2002-04-30 The Procter & Gamble Company Intracutaneous microneedle array apparatus
EP1125704B2 (en) 1999-08-30 2011-10-05 NGK Insulators, Ltd. Corrugated wall honeycomb structure and production method thereof
EP1234053B1 (en) * 1999-11-15 2007-04-18 I-Stat Corporation Apparatus and method for assaying coagulation in fluid samples
DE10003507B4 (en) * 2000-01-27 2004-06-03 Knoll, Meinhard, Prof. Dr. Device and method for the removal of liquids from the body's own tissue and determination of substance concentrations in this liquid
US6706159B2 (en) 2000-03-02 2004-03-16 Diabetes Diagnostics Combined lancet and electrochemical analyte-testing apparatus
AU2001245472A1 (en) * 2000-03-09 2001-09-17 Nanopass Ltd. Systems and methods for the transport of fluids through a biological barrier andproduction techniques for such systems
US6612111B1 (en) * 2000-03-27 2003-09-02 Lifescan, Inc. Method and device for sampling and analyzing interstitial fluid and whole blood samples
DE10052066A1 (en) 2000-10-19 2002-05-29 Inverness Medical Ltd Screen printable paste for the production of a porous polymer membrane for a biosensor

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699437A (en) * 1968-09-27 1972-10-17 Amiram Ur Blood coagulation detection method and apparatus
US5300779A (en) * 1985-08-05 1994-04-05 Biotrack, Inc. Capillary flow device
US4758884A (en) * 1986-05-19 1988-07-19 Kaiser Electronics Electronically switched field sequential color video display having parallel color inputs
US5039617A (en) * 1989-04-20 1991-08-13 Biotrack, Inc. Capillary flow device and method for measuring activated partial thromboplastin time
US5328847A (en) * 1990-02-20 1994-07-12 Case George D Thin membrane sensor with biochemical switch
US5344754A (en) * 1993-01-13 1994-09-06 Avocet Medical, Inc. Assay timed by electrical resistance change and test strip
US5591139A (en) * 1994-06-06 1997-01-07 The Regents Of The University Of California IC-processed microneedles
US6084880A (en) * 1994-09-12 2000-07-04 Efficient Networks, Inc. Asynchronous transfer mode adapter for desktop applications
US5577499A (en) * 1994-10-03 1996-11-26 Teves; Leonides Y. Blood analyzer
US5534226A (en) * 1994-10-21 1996-07-09 International Technidyne Corporation Portable test apparatus and associated method of performing a blood coagulation test
US6312393B1 (en) * 1996-09-04 2001-11-06 Marcio Marc A. M. Abreu Contact device for placement in direct apposition to the conjunctive of the eye
US6090323A (en) * 1997-10-30 2000-07-18 Navitas Co., Ltd. Method for manufacturing card product
US7344499B1 (en) * 1998-06-10 2008-03-18 Georgia Tech Research Corporation Microneedle device for extraction and sensing of bodily fluids
US6887202B2 (en) * 2000-06-01 2005-05-03 Science Applications International Corporation Systems and methods for monitoring health and delivering drugs transdermally
US6540675B2 (en) * 2000-06-27 2003-04-01 Rosedale Medical, Inc. Analyte monitor

Cited By (559)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9066695B2 (en) 1998-04-30 2015-06-30 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8641619B2 (en) 1998-04-30 2014-02-04 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8162829B2 (en) 1998-04-30 2012-04-24 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8175673B2 (en) 1998-04-30 2012-05-08 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8177716B2 (en) 1998-04-30 2012-05-15 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8224413B2 (en) 1998-04-30 2012-07-17 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8226558B2 (en) 1998-04-30 2012-07-24 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8226557B2 (en) 1998-04-30 2012-07-24 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8226555B2 (en) 1998-04-30 2012-07-24 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US10478108B2 (en) 1998-04-30 2019-11-19 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8231532B2 (en) 1998-04-30 2012-07-31 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8235896B2 (en) 1998-04-30 2012-08-07 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US7885699B2 (en) 1998-04-30 2011-02-08 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US7869853B1 (en) 1998-04-30 2011-01-11 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8255031B2 (en) 1998-04-30 2012-08-28 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US7860544B2 (en) 1998-04-30 2010-12-28 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8260392B2 (en) 1998-04-30 2012-09-04 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8265726B2 (en) 1998-04-30 2012-09-11 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9326714B2 (en) 1998-04-30 2016-05-03 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8275439B2 (en) 1998-04-30 2012-09-25 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8273022B2 (en) 1998-04-30 2012-09-25 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9072477B2 (en) 1998-04-30 2015-07-07 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8287454B2 (en) 1998-04-30 2012-10-16 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8306598B2 (en) 1998-04-30 2012-11-06 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9066694B2 (en) 1998-04-30 2015-06-30 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9066697B2 (en) 1998-04-30 2015-06-30 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9042953B2 (en) 1998-04-30 2015-05-26 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8346337B2 (en) 1998-04-30 2013-01-01 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9014773B2 (en) 1998-04-30 2015-04-21 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9011331B2 (en) 1998-04-30 2015-04-21 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8974386B2 (en) 1998-04-30 2015-03-10 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
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US8880137B2 (en) 1998-04-30 2014-11-04 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8840553B2 (en) 1998-04-30 2014-09-23 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
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US8774887B2 (en) 1998-04-30 2014-07-08 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8357091B2 (en) 1998-04-30 2013-01-22 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8744545B2 (en) 1998-04-30 2014-06-03 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
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US8734346B2 (en) 1998-04-30 2014-05-27 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8738109B2 (en) 1998-04-30 2014-05-27 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8734348B2 (en) 1998-04-30 2014-05-27 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8372005B2 (en) 1998-04-30 2013-02-12 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8688188B2 (en) 1998-04-30 2014-04-01 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8672844B2 (en) 1998-04-30 2014-03-18 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8380273B2 (en) 1998-04-30 2013-02-19 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8670815B2 (en) 1998-04-30 2014-03-11 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8391945B2 (en) 1998-04-30 2013-03-05 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8409131B2 (en) 1998-04-30 2013-04-02 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8666469B2 (en) 1998-04-30 2014-03-04 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8660627B2 (en) 1998-04-30 2014-02-25 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8465425B2 (en) 1998-04-30 2013-06-18 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8649841B2 (en) 1998-04-30 2014-02-11 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8473021B2 (en) 1998-04-30 2013-06-25 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8480580B2 (en) 1998-04-30 2013-07-09 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8622906B2 (en) 1998-04-30 2014-01-07 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8597189B2 (en) 1998-04-30 2013-12-03 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8617071B2 (en) 1998-04-30 2013-12-31 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8612159B2 (en) 1998-04-30 2013-12-17 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9610034B2 (en) 2001-01-02 2017-04-04 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9498159B2 (en) 2001-01-02 2016-11-22 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8652043B2 (en) 2001-01-02 2014-02-18 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8668645B2 (en) 2001-01-02 2014-03-11 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9011332B2 (en) 2001-01-02 2015-04-21 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US7310543B2 (en) 2001-03-26 2007-12-18 Kumetrix, Inc. Silicon microprobe with integrated biosensor
US20020137998A1 (en) * 2001-03-26 2002-09-26 Wilson Smart Silicon microprobe with integrated biosensor
US20080097171A1 (en) * 2001-03-26 2008-04-24 Wilson Smart Silicon microprobe with integrated biosensor
US9477811B2 (en) 2001-04-02 2016-10-25 Abbott Diabetes Care Inc. Blood glucose tracking apparatus and methods
US8268243B2 (en) 2001-04-02 2012-09-18 Abbott Diabetes Care Inc. Blood glucose tracking apparatus and methods
US7976778B2 (en) 2001-04-02 2011-07-12 Abbott Diabetes Care Inc. Blood glucose tracking apparatus
US8765059B2 (en) 2001-04-02 2014-07-01 Abbott Diabetes Care Inc. Blood glucose tracking apparatus
US8236242B2 (en) 2001-04-02 2012-08-07 Abbott Diabetes Care Inc. Blood glucose tracking apparatus and methods
US7288073B2 (en) 2001-07-20 2007-10-30 Roche Diagnostics Operations, Inc. System for withdrawing small amounts of body fluid
US8821413B2 (en) 2001-07-20 2014-09-02 Roche Diagnostics Operations, Inc. System for withdrawing small amounts of body fluid
US7993284B2 (en) 2001-07-20 2011-08-09 Roche Diagnostics Operations, Inc. System for withdrawing small amounts of body fluid
US8388552B2 (en) 2001-07-20 2013-03-05 Roche Diagnostics Operations, Inc. System for withdrawing small amounts of body fluid
US20030018282A1 (en) * 2001-07-20 2003-01-23 Carlo Effenhauser System for withdrawing small amounts of body fluid
US20080009767A1 (en) * 2001-07-20 2008-01-10 Roche Diagnostics Operations, Inc. System for withdrawing small amounts of body fluid
US10772550B2 (en) 2002-02-08 2020-09-15 Intuity Medical, Inc. Autonomous, ambulatory analyte monitor or drug delivery device
US7922458B2 (en) 2002-10-09 2011-04-12 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US7993108B2 (en) 2002-10-09 2011-08-09 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US8343093B2 (en) 2002-10-09 2013-01-01 Abbott Diabetes Care Inc. Fluid delivery device with autocalibration
US8029250B2 (en) 2002-10-09 2011-10-04 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US7993109B2 (en) 2002-10-09 2011-08-09 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US8029245B2 (en) 2002-10-09 2011-10-04 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US8047812B2 (en) 2002-10-09 2011-11-01 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US8047811B2 (en) 2002-10-09 2011-11-01 Abbott Diabetes Care Inc. Variable volume, shape memory actuated insulin dispensing pump
US20050049522A1 (en) * 2002-10-30 2005-03-03 Allen John J Method of lancing skin for the extraction of blood
US10973443B2 (en) 2002-11-05 2021-04-13 Abbott Diabetes Care Inc. Sensor inserter assembly
US9980670B2 (en) 2002-11-05 2018-05-29 Abbott Diabetes Care Inc. Sensor inserter assembly
US11141084B2 (en) 2002-11-05 2021-10-12 Abbott Diabetes Care Inc. Sensor inserter assembly
US11116430B2 (en) 2002-11-05 2021-09-14 Abbott Diabetes Care Inc. Sensor inserter assembly
US10750952B2 (en) 2002-12-31 2020-08-25 Abbott Diabetes Care Inc. Continuous glucose monitoring system and methods of use
US8622903B2 (en) 2002-12-31 2014-01-07 Abbott Diabetes Care Inc. Continuous glucose monitoring system and methods of use
US10039881B2 (en) 2002-12-31 2018-08-07 Abbott Diabetes Care Inc. Method and system for providing data communication in continuous glucose monitoring and management system
US8187183B2 (en) 2002-12-31 2012-05-29 Abbott Diabetes Care Inc. Continuous glucose monitoring system and methods of use
US9962091B2 (en) 2002-12-31 2018-05-08 Abbott Diabetes Care Inc. Continuous glucose monitoring system and methods of use
US7811231B2 (en) 2002-12-31 2010-10-12 Abbott Diabetes Care Inc. Continuous glucose monitoring system and methods of use
US9095292B2 (en) 2003-03-24 2015-08-04 Intuity Medical, Inc. Analyte concentration detection devices and methods
US8231832B2 (en) 2003-03-24 2012-07-31 Intuity Medical, Inc. Analyte concentration detection devices and methods
US20040193072A1 (en) * 2003-03-28 2004-09-30 Allen John J. Method of analyte measurement using integrated lance and strip
US20060074351A1 (en) * 2003-03-28 2006-04-06 Allen John J Integrated lance and strip for analyte measurement
US7473264B2 (en) 2003-03-28 2009-01-06 Lifescan, Inc. Integrated lance and strip for analyte measurement
US20060030789A1 (en) * 2003-03-28 2006-02-09 Allen John J Integrated lance and strip for analyte measurement
US7169117B2 (en) 2003-03-28 2007-01-30 Lifescan, Inc. Integrated lance and strip for analyte measurement
US8512246B2 (en) 2003-04-28 2013-08-20 Abbott Diabetes Care Inc. Method and apparatus for providing peak detection circuitry for data communication systems
US7679407B2 (en) 2003-04-28 2010-03-16 Abbott Diabetes Care Inc. Method and apparatus for providing peak detection circuitry for data communication systems
US9730584B2 (en) 2003-06-10 2017-08-15 Abbott Diabetes Care Inc. Glucose measuring device for use in personal area network
US8512239B2 (en) 2003-06-10 2013-08-20 Abbott Diabetes Care Inc. Glucose measuring device for use in personal area network
US8647269B2 (en) 2003-06-10 2014-02-11 Abbott Diabetes Care Inc. Glucose measuring device for use in personal area network
US8066639B2 (en) 2003-06-10 2011-11-29 Abbott Diabetes Care Inc. Glucose measuring device for use in personal area network
US11737694B2 (en) 2003-09-03 2023-08-29 Life Patch International, Inc. Personal diagnostic device having a plurality of tubules
US20180344230A1 (en) * 2003-09-03 2018-12-06 Life Patch International Personal diagnostic device having a plurality of tubules
US20160066828A1 (en) * 2003-09-03 2016-03-10 Life Patch International, Inc. Personal diagnostic device having an air sample collection unit and a fluidic circuit
US20050106713A1 (en) * 2003-09-03 2005-05-19 Phan Brigitte C. Personal diagnostic devices and related methods
US20160058354A1 (en) * 2003-09-03 2016-03-03 Life Patch International, Inc. Personal diagnostic device having a fluidic circuit with a plurality of analysis chambers
US9993189B2 (en) * 2003-09-03 2018-06-12 Life Patch International Personal diagnostic device having a fluidic circuit with a plurality of analysis chambers
US9133024B2 (en) * 2003-09-03 2015-09-15 Brigitte Chau Phan Personal diagnostic devices including related methods and systems
US20110166553A1 (en) * 2003-09-11 2011-07-07 Holmes Elizabeth A Medical device for analyte monitoring and drug delivery
US20050059166A1 (en) * 2003-09-11 2005-03-17 Robert Markes Sampling instrument
US20060182738A1 (en) * 2003-09-11 2006-08-17 Holmes Elizabeth A Medical device for analyte monitoring and drug delivery
US20060062852A1 (en) * 2003-09-11 2006-03-23 Holmes Elizabeth A Medical device for analyte monitoring and drug delivery
US8202697B2 (en) 2003-09-11 2012-06-19 Theranos, Inc. Medical device for analyte monitoring and drug delivery
US8101402B2 (en) 2003-09-11 2012-01-24 Theranos, Inc. Medical device for analyte monitoring and drug delivery
US7291497B2 (en) * 2003-09-11 2007-11-06 Theranos, Inc. Medical device for analyte monitoring and drug delivery
US9131884B2 (en) 2003-09-11 2015-09-15 Theranos, Inc. Medical device for analyte monitoring and drug delivery
US10130283B2 (en) 2003-09-11 2018-11-20 Theranos, IP Company, LLC Medical device for analyte monitoring and drug delivery
US20110004084A1 (en) * 2003-10-31 2011-01-06 Abbott Diabetes Care Inc. Method of Calibrating an Analyte-Measurement Device, and Associated Methods, Devices and Systems
USD902408S1 (en) 2003-11-05 2020-11-17 Abbott Diabetes Care Inc. Analyte sensor control unit
USD914881S1 (en) 2003-11-05 2021-03-30 Abbott Diabetes Care Inc. Analyte sensor electronic mount
US8771183B2 (en) 2004-02-17 2014-07-08 Abbott Diabetes Care Inc. Method and system for providing data communication in continuous glucose monitoring and management system
US20050187525A1 (en) * 2004-02-19 2005-08-25 Hilgers Michael E. Devices and methods for extracting bodily fluid
US7156117B2 (en) 2004-03-31 2007-01-02 Lifescan Scotland Limited Method of controlling the movement of fluid through a microfluidic circuit using an array of triggerable passive valves
US20050217741A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Method of controlling the movement of fluid through a microfluidic circuit using an array of triggerable passive valves
US7665303B2 (en) 2004-03-31 2010-02-23 Lifescan Scotland, Ltd. Method of segregating a bolus of fluid using a pneumatic actuator in a fluid handling circuit
US7059352B2 (en) 2004-03-31 2006-06-13 Lifescan Scotland Triggerable passive valve for use in controlling the flow of fluid
US20050220629A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Method of segregating a bolus of fluid using a pneumatic actuator in a fluid handling circuit
US20050217743A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Triggerable passive valve for use in controlling the flow of fluid
US20050217742A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Microfluidic circuit including an array of triggerable passive valves
US20050220644A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Pneumatic actuator for bolus generation in a fluid handling circuit
US20050220630A1 (en) * 2004-03-31 2005-10-06 Sebastian Bohm Method of using triggerable passive valves to control the flow of fluid
US20050284773A1 (en) * 2004-06-29 2005-12-29 Allen John J Method of preventing reuse in an analyte measuring system
US20060000710A1 (en) * 2004-06-30 2006-01-05 Klaus Peter Weidenhaupt Fluid handling methods
JP2006015148A (en) * 2004-06-30 2006-01-19 Lifescan Scotland Ltd Fluid handling device
US20060004303A1 (en) * 2004-06-30 2006-01-05 Weidenhaupt Klaus P Fluid handling devices
US8343074B2 (en) 2004-06-30 2013-01-01 Lifescan Scotland Limited Fluid handling devices
US20090007631A1 (en) * 2004-08-02 2009-01-08 Daikin Industries, Ltd. Oxygen Electrode
WO2006030201A1 (en) 2004-09-13 2006-03-23 Microsample Ltd. Method and apparatus for sampling and analysis of fluids
US8092394B2 (en) 2004-09-13 2012-01-10 Microsample Ltd. Method and apparatus for sampling and analysis of fluids
US20070232956A1 (en) * 2004-09-13 2007-10-04 Microsample Ltd. Method and Apparatus for Sampling and Analysis of Fluids
US11160475B2 (en) 2004-12-29 2021-11-02 Abbott Diabetes Care Inc. Sensor inserter having introducer
US10226207B2 (en) 2004-12-29 2019-03-12 Abbott Diabetes Care Inc. Sensor inserter having introducer
US20090082693A1 (en) * 2004-12-29 2009-03-26 Therasense, Inc. Method and apparatus for providing temperature sensor module in a data communication system
US8571624B2 (en) 2004-12-29 2013-10-29 Abbott Diabetes Care Inc. Method and apparatus for mounting a data transmission device in a communication system
US20110178435A1 (en) * 2005-03-02 2011-07-21 Roe Steven N System and method for breaking a sterility seal to engage a lancet
US7935063B2 (en) 2005-03-02 2011-05-03 Roche Diagnostics Operations, Inc. System and method for breaking a sterility seal to engage a lancet
US9445756B2 (en) 2005-03-02 2016-09-20 Roche Diabetes Care, Inc. Dynamic integrated lancing test strip with sterility cover
US20110000168A1 (en) * 2005-03-02 2011-01-06 Roe Steven N Dynamic integrated lancing test strip with sterility cover
US20060200045A1 (en) * 2005-03-02 2006-09-07 Roe Steven N Dynamic integrated lancing test strip with sterility cover
US7815579B2 (en) 2005-03-02 2010-10-19 Roche Diagnostics Operations, Inc. Dynamic integrated lancing test strip with sterility cover
US20070167869A1 (en) * 2005-03-02 2007-07-19 Roe Steven N System and method for breaking a sterility seal to engage a lancet
US9034250B2 (en) 2005-03-02 2015-05-19 Roche Diagnostics Operations, Inc. Dynamic integrated lancing test strip with sterility cover
US8029459B2 (en) 2005-03-21 2011-10-04 Abbott Diabetes Care Inc. Method and system for providing integrated medication infusion and analyte monitoring system
US8029460B2 (en) 2005-03-21 2011-10-04 Abbott Diabetes Care Inc. Method and system for providing integrated medication infusion and analyte monitoring system
US8343092B2 (en) 2005-03-21 2013-01-01 Abbott Diabetes Care Inc. Method and system for providing integrated medication infusion and analyte monitoring system
EP1869414A4 (en) * 2005-03-29 2010-07-28 Arkal Medical Inc Devices, systems, methods and tools for continuous glucose monitoring
US20100292551A1 (en) * 2005-03-29 2010-11-18 Jina Arvind N Devices, systems, methods and tools for continuous glucose monitoring
EP1869414A2 (en) * 2005-03-29 2007-12-26 Arkal Medical, Inc. Devices, systems, methods and tools for continuous glucose monitoring
WO2006105146A2 (en) 2005-03-29 2006-10-05 Arkal Medical, Inc. Devices, systems, methods and tools for continuous glucose monitoring
US7949382B2 (en) 2005-03-29 2011-05-24 Arkal Medical, Inc. Devices, systems, methods and tools for continuous glucose monitoring
WO2006114649A1 (en) 2005-04-26 2006-11-02 Bio-Nano Sensium Technologies Limited Sensor configuration
US8112240B2 (en) 2005-04-29 2012-02-07 Abbott Diabetes Care Inc. Method and apparatus for providing leak detection in data monitoring and management systems
US20100081144A1 (en) * 2005-05-09 2010-04-01 Theranos, Inc. Point-of-care fluidic systems and uses thereof
US8841076B2 (en) 2005-05-09 2014-09-23 Theranos, Inc. Systems and methods for conducting animal studies
US20100074799A1 (en) * 2005-05-09 2010-03-25 Kemp Timothy M Fluidic Medical Devices and Uses Thereof
KR101762424B1 (en) * 2005-05-09 2017-07-28 테라노스, 인코포레이티드 Point-of-care fluidic systems and uses thereof
US9075046B2 (en) 2005-05-09 2015-07-07 Theranos, Inc. Fluidic medical devices and uses thereof
US20060264780A1 (en) * 2005-05-09 2006-11-23 Holmes Elizabeth A Systems and methods for conducting animal studies
US20060264782A1 (en) * 2005-05-09 2006-11-23 Holmes Elizabeth A Point-of-care fluidic systems and uses thereof
US20060264783A1 (en) * 2005-05-09 2006-11-23 Holmes Elizabeth A Systems and methods for monitoring pharmacological parameters
US20080009766A1 (en) * 2005-05-09 2008-01-10 Holmes Elizabeth A Systems and methods for improving medical treatments
US10761030B2 (en) 2005-05-09 2020-09-01 Labrador Diagnostics Llc System and methods for analyte detection
US7635594B2 (en) 2005-05-09 2009-12-22 Theranos, Inc. Point-of-care fluidic systems and uses thereof
US8679407B2 (en) 2005-05-09 2014-03-25 Theranos, Inc. Systems and methods for improving medical treatments
US20110104826A1 (en) * 2005-05-09 2011-05-05 Ian Gibbons Calibration of fluidic devices
US11630069B2 (en) 2005-05-09 2023-04-18 Labrador Diagnostics Llc Fluidic medical devices and uses thereof
KR101381331B1 (en) * 2005-05-09 2014-04-04 테라노스, 인코포레이티드 Point-of-care fluidic systems and uses thereof
KR101392106B1 (en) * 2005-05-09 2014-05-07 테라노스, 인코포레이티드 Point-of-care fluidic systems and uses thereof
US9182388B2 (en) 2005-05-09 2015-11-10 Theranos, Inc. Calibration of fluidic devices
US10908093B2 (en) 2005-05-09 2021-02-02 Labrador Diagnostics, LLC Calibration of fluidic devices
KR101569265B1 (en) * 2005-05-09 2015-11-13 테라노스, 인코포레이티드 Point-of-care fluidic systems and uses thereof
US20060264779A1 (en) * 2005-05-09 2006-11-23 Kemp Timothy M Fluidic medical devices and uses thereof
KR101569307B1 (en) 2005-05-09 2015-11-13 테라노스, 인코포레이티드 Point-of-care fluidic systems and uses thereof
US9772291B2 (en) 2005-05-09 2017-09-26 Theranos, Inc. Fluidic medical devices and uses thereof
KR101322943B1 (en) * 2005-05-09 2013-10-29 테라노스, 인코포레이티드 Point-of-care fluidic systems and uses thereof
US8283155B2 (en) 2005-05-09 2012-10-09 Theranos, Inc. Point-of-care fluidic systems and uses thereof
US7888125B2 (en) 2005-05-09 2011-02-15 Theranos, Inc. Calibration of fluidic devices
US8653977B2 (en) 2005-05-17 2014-02-18 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US7884729B2 (en) 2005-05-17 2011-02-08 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US10206611B2 (en) 2005-05-17 2019-02-19 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US9750440B2 (en) 2005-05-17 2017-09-05 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US8089363B2 (en) 2005-05-17 2012-01-03 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US9332944B2 (en) 2005-05-17 2016-05-10 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US8471714B2 (en) 2005-05-17 2013-06-25 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US7768408B2 (en) 2005-05-17 2010-08-03 Abbott Diabetes Care Inc. Method and system for providing data management in data monitoring system
US8112138B2 (en) 2005-06-03 2012-02-07 Abbott Diabetes Care Inc. Method and apparatus for providing rechargeable power in data monitoring and management systems
US8969097B2 (en) 2005-06-13 2015-03-03 Intuity Medical, Inc. Analyte detection devices and methods with hematocrit-volume correction and feedback control
US10226208B2 (en) 2005-06-13 2019-03-12 Intuity Medical, Inc. Analyte detection devices and methods with hematocrit/volume correction and feedback control
US11419532B2 (en) 2005-06-13 2022-08-23 Intuity Medical, Inc. Analyte detection devices and methods with hematocrit/volume correction and feedback control
US9366636B2 (en) 2005-06-13 2016-06-14 Intuity Medical, Inc. Analyte detection devices and methods with hematocrit/volume correction and feedback control
US8602991B2 (en) 2005-08-30 2013-12-10 Abbott Diabetes Care Inc. Analyte sensor introducer and methods of use
US11457869B2 (en) 2005-09-30 2022-10-04 Abbott Diabetes Care Inc. Integrated transmitter unit and sensor introducer mechanism and methods of use
US8801631B2 (en) * 2005-09-30 2014-08-12 Intuity Medical, Inc. Devices and methods for facilitating fluid transport
US10433780B2 (en) 2005-09-30 2019-10-08 Intuity Medical, Inc. Devices and methods for facilitating fluid transport
US9775563B2 (en) 2005-09-30 2017-10-03 Abbott Diabetes Care Inc. Integrated introducer and transmitter assembly and methods of use
US10342489B2 (en) 2005-09-30 2019-07-09 Abbott Diabetes Care Inc. Integrated introducer and transmitter assembly and methods of use
US9839384B2 (en) 2005-09-30 2017-12-12 Intuity Medical, Inc. Body fluid sampling arrangements
US8512243B2 (en) 2005-09-30 2013-08-20 Abbott Diabetes Care Inc. Integrated introducer and transmitter assembly and methods of use
US20070078313A1 (en) * 2005-09-30 2007-04-05 Rosedale Medical, Inc. Fluid sample transport devices and methods
US9521968B2 (en) 2005-09-30 2016-12-20 Abbott Diabetes Care Inc. Analyte sensor retention mechanism and methods of use
US9480421B2 (en) 2005-09-30 2016-11-01 Abbott Diabetes Care Inc. Integrated introducer and transmitter assembly and methods of use
US10842427B2 (en) 2005-09-30 2020-11-24 Intuity Medical, Inc. Body fluid sampling arrangements
US8360994B2 (en) 2005-09-30 2013-01-29 Intuity Medical, Inc. Arrangement for body fluid sample extraction
WO2007041063A3 (en) * 2005-09-30 2007-08-09 Rosedale Medical Inc Fluid sample transport devices and methods
US8382681B2 (en) 2005-09-30 2013-02-26 Intuity Medical, Inc. Fully integrated wearable or handheld monitor
US20110098599A1 (en) * 2005-09-30 2011-04-28 Intuity Medical, Inc. Fluid Sample Transport Devices and Methods
US9060723B2 (en) 2005-09-30 2015-06-23 Intuity Medical, Inc. Body fluid sampling arrangements
US9398882B2 (en) 2005-09-30 2016-07-26 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor and data processing device
US8360993B2 (en) 2005-09-30 2013-01-29 Intuity Medical, Inc. Method for body fluid sample extraction
US9380974B2 (en) 2005-09-30 2016-07-05 Intuity Medical, Inc. Multi-site body fluid sampling and analysis cartridge
US7756561B2 (en) 2005-09-30 2010-07-13 Abbott Diabetes Care Inc. Method and apparatus for providing rechargeable power in data monitoring and management systems
US7887494B2 (en) 2005-09-30 2011-02-15 Intuity Medical, Inc. Fluid sample transport devices and methods
USD979766S1 (en) 2005-09-30 2023-02-28 Abbott Diabetes Care Inc. Analyte sensor device
US8795201B2 (en) 2005-09-30 2014-08-05 Intuity Medical, Inc. Catalysts for body fluid sample extraction
US10194863B2 (en) 2005-09-30 2019-02-05 Abbott Diabetes Care Inc. Integrated transmitter unit and sensor introducer mechanism and methods of use
US10441205B2 (en) 2005-09-30 2019-10-15 Intuity Medical, Inc. Multi-site body fluid sampling and analysis cartridge
US20120022352A1 (en) * 2005-10-12 2012-01-26 Masaki Fujiwara Blood sensor, blood testing apparatus, and method for controlling blood testing apparatus
US8638220B2 (en) 2005-10-31 2014-01-28 Abbott Diabetes Care Inc. Method and apparatus for providing data communication in data monitoring and management systems
US11272867B2 (en) 2005-11-01 2022-03-15 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9326716B2 (en) 2005-11-01 2016-05-03 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US11103165B2 (en) 2005-11-01 2021-08-31 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US11363975B2 (en) 2005-11-01 2022-06-21 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US10201301B2 (en) 2005-11-01 2019-02-12 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US10231654B2 (en) 2005-11-01 2019-03-19 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8915850B2 (en) 2005-11-01 2014-12-23 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US10952652B2 (en) 2005-11-01 2021-03-23 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US9078607B2 (en) 2005-11-01 2015-07-14 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8920319B2 (en) 2005-11-01 2014-12-30 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US11911151B1 (en) 2005-11-01 2024-02-27 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US11399748B2 (en) 2005-11-01 2022-08-02 Abbott Diabetes Care Inc. Analyte monitoring device and methods of use
US8585591B2 (en) 2005-11-04 2013-11-19 Abbott Diabetes Care Inc. Method and system for providing basal profile modification in analyte monitoring and management systems
US9323898B2 (en) 2005-11-04 2016-04-26 Abbott Diabetes Care Inc. Method and system for providing basal profile modification in analyte monitoring and management systems
US7766829B2 (en) 2005-11-04 2010-08-03 Abbott Diabetes Care Inc. Method and system for providing basal profile modification in analyte monitoring and management systems
US11538580B2 (en) 2005-11-04 2022-12-27 Abbott Diabetes Care Inc. Method and system for providing basal profile modification in analyte monitoring and management systems
US9669162B2 (en) 2005-11-04 2017-06-06 Abbott Diabetes Care Inc. Method and system for providing basal profile modification in analyte monitoring and management systems
US8852101B2 (en) 2005-12-28 2014-10-07 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
US8545403B2 (en) 2005-12-28 2013-10-01 Abbott Diabetes Care Inc. Medical device insertion
US10307091B2 (en) 2005-12-28 2019-06-04 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
US11298058B2 (en) 2005-12-28 2022-04-12 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
US9332933B2 (en) 2005-12-28 2016-05-10 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
US9795331B2 (en) 2005-12-28 2017-10-24 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion
US8344966B2 (en) 2006-01-31 2013-01-01 Abbott Diabetes Care Inc. Method and system for providing a fault tolerant display unit in an electronic device
US10117614B2 (en) 2006-02-28 2018-11-06 Abbott Diabetes Care Inc. Method and system for providing continuous calibration of implantable analyte sensors
USD961778S1 (en) 2006-02-28 2022-08-23 Abbott Diabetes Care Inc. Analyte sensor device
US11872039B2 (en) 2006-02-28 2024-01-16 Abbott Diabetes Care Inc. Method and system for providing continuous calibration of implantable analyte sensors
US20090099478A1 (en) * 2006-03-13 2009-04-16 Microsample Ltd Method and apparatus for piercing the skin and delivery or collection of liquids
US9176126B2 (en) * 2006-03-24 2015-11-03 Theranos, Inc. Systems and methods of sample processing and fluid control in a fluidic system
US20070224084A1 (en) * 2006-03-24 2007-09-27 Holmes Elizabeth A Systems and Methods of Sample Processing and Fluid Control in a Fluidic System
US8741230B2 (en) 2006-03-24 2014-06-03 Theranos, Inc. Systems and methods of sample processing and fluid control in a fluidic system
US11287421B2 (en) 2006-03-24 2022-03-29 Labrador Diagnostics Llc Systems and methods of sample processing and fluid control in a fluidic system
US10533994B2 (en) 2006-03-24 2020-01-14 Theranos Ip Company, Llc Systems and methods of sample processing and fluid control in a fluidic system
US20090131778A1 (en) * 2006-03-28 2009-05-21 Jina Arvind N Devices, systems, methods and tools for continuous glucose monitoring
US20100049021A1 (en) * 2006-03-28 2010-02-25 Jina Arvind N Devices, systems, methods and tools for continuous analyte monitoring
US8226891B2 (en) 2006-03-31 2012-07-24 Abbott Diabetes Care Inc. Analyte monitoring devices and methods therefor
US9380971B2 (en) 2006-03-31 2016-07-05 Abbott Diabetes Care Inc. Method and system for powering an electronic device
US20100324401A1 (en) * 2006-03-31 2010-12-23 Lifescan, Inc. Diabetes management methods and systems
US20070232876A1 (en) * 2006-03-31 2007-10-04 Erik Otto Diabetes management methods and systems
US9039975B2 (en) 2006-03-31 2015-05-26 Abbott Diabetes Care Inc. Analyte monitoring devices and methods therefor
US8933664B2 (en) 2006-03-31 2015-01-13 Abbott Diabetes Care Inc. Method and system for powering an electronic device
US9743863B2 (en) 2006-03-31 2017-08-29 Abbott Diabetes Care Inc. Method and system for powering an electronic device
US7824333B2 (en) 2006-03-31 2010-11-02 Lifescan, Inc. Diabetes management methods and systems
US8593109B2 (en) 2006-03-31 2013-11-26 Abbott Diabetes Care Inc. Method and system for powering an electronic device
US9625413B2 (en) 2006-03-31 2017-04-18 Abbott Diabetes Care Inc. Analyte monitoring devices and methods therefor
US8597575B2 (en) 2006-03-31 2013-12-03 Abbott Diabetes Care Inc. Analyte monitoring devices and methods therefor
US10028680B2 (en) 2006-04-28 2018-07-24 Abbott Diabetes Care Inc. Introducer assembly and methods of use
US10736547B2 (en) 2006-04-28 2020-08-11 Abbott Diabetes Care Inc. Introducer assembly and methods of use
US8007999B2 (en) 2006-05-10 2011-08-30 Theranos, Inc. Real-time detection of influenza virus
US11162947B2 (en) 2006-05-10 2021-11-02 Labrador Diagnostics Llc Real-time detection of influenza virus
US9885715B2 (en) 2006-05-10 2018-02-06 Theranos IP Comany, LLC Real-time detection of influenza virus
US8669047B2 (en) 2006-05-10 2014-03-11 Theranos, Inc. Real-time detection of influenza virus
US20070264629A1 (en) * 2006-05-10 2007-11-15 Holmes Elizabeth A Real-Time Detection of Influenza Virus
US20070276211A1 (en) * 2006-05-26 2007-11-29 Jose Mir Compact minimally invasive biomedical monitor
US7920907B2 (en) 2006-06-07 2011-04-05 Abbott Diabetes Care Inc. Analyte monitoring system and method
US20100100005A1 (en) * 2006-07-11 2010-04-22 Infotonics Technology Center, Inc. Minimally invasive allergy testing system with coated allergens
US20100023045A1 (en) * 2006-07-15 2010-01-28 Heinz Macho Lancet, Lancet Supply Ribbon, and Puncturing Device for Generating a Puncturing Wound
US8862198B2 (en) 2006-09-10 2014-10-14 Abbott Diabetes Care Inc. Method and system for providing an integrated analyte sensor insertion device and data processing unit
US10362972B2 (en) 2006-09-10 2019-07-30 Abbott Diabetes Care Inc. Method and system for providing an integrated analyte sensor insertion device and data processing unit
US8333714B2 (en) 2006-09-10 2012-12-18 Abbott Diabetes Care Inc. Method and system for providing an integrated analyte sensor insertion device and data processing unit
US9808186B2 (en) 2006-09-10 2017-11-07 Abbott Diabetes Care Inc. Method and system for providing an integrated analyte sensor insertion device and data processing unit
US8293096B2 (en) 2006-10-05 2012-10-23 Lifescan Scotland Limited Systems and methods for determining a substantially hematocrit independent analyte concentration
US9046480B2 (en) 2006-10-05 2015-06-02 Lifescan Scotland Limited Method for determining hematocrit corrected analyte concentrations
US20100219084A1 (en) * 2006-10-05 2010-09-02 Stephen Patrick Blythe Method for determining hematocrit corrected analyte concentrations
US8388821B2 (en) 2006-10-05 2013-03-05 Lifescan Scotland Limited Method for determining hematocrit corrected analyte concentrations
US8815076B2 (en) 2006-10-05 2014-08-26 Lifescan Scotland Limited Systems and methods for determining a substantially hematocrit independent analyte concentration
US20110162978A1 (en) * 2006-10-05 2011-07-07 Lifescan Scotland Ltd. Systems and methods for determining a substantially hematocrit independent analyte concentration
US20110230905A1 (en) * 2006-10-13 2011-09-22 Roche Diagnostics Operations, Inc. Tape transport lance sampler
US11215610B2 (en) 2006-10-13 2022-01-04 Labrador Diagnostics Llc Reducing optical interference in a fluidic device
US10067123B2 (en) * 2006-10-13 2018-09-04 Theranos Ip Company Llc Reducing optical interference in a fluidic device
WO2008043565A2 (en) * 2006-10-13 2008-04-17 Roche Diagnostics Gmbh Tape transport lance sampler
US7955271B2 (en) 2006-10-13 2011-06-07 Roche Diagnostics Operations, Inc. Tape transport lance sampler
US8852124B2 (en) 2006-10-13 2014-10-07 Roche Diagnostics Operations, Inc. Tape transport lance sampler
US8328736B2 (en) 2006-10-13 2012-12-11 Roche Diagnostics Operations, Inc. Tape transport lance sampler
US20080103415A1 (en) * 2006-10-13 2008-05-01 Roe Steven N Tape transport lance sampler
WO2008043565A3 (en) * 2006-10-13 2008-07-03 Roche Diagnostics Gmbh Tape transport lance sampler
US20140154708A1 (en) * 2006-10-13 2014-06-05 Theranos, Inc. Reducing optical interference in a fluidic device
US11442061B2 (en) 2006-10-13 2022-09-13 Labrador Diagnostics Llc Reducing optical interference in a fluidic device
US10363363B2 (en) 2006-10-23 2019-07-30 Abbott Diabetes Care Inc. Flexible patch for fluid delivery and monitoring body analytes
US9788771B2 (en) 2006-10-23 2017-10-17 Abbott Diabetes Care Inc. Variable speed sensor insertion devices and methods of use
US11724029B2 (en) 2006-10-23 2023-08-15 Abbott Diabetes Care Inc. Flexible patch for fluid delivery and monitoring body analytes
EP2083878A2 (en) * 2006-10-23 2009-08-05 Abbott Diabetes Care, Inc. Flexible patch for fluid delivery and monitoring body analytes
US9259175B2 (en) 2006-10-23 2016-02-16 Abbott Diabetes Care, Inc. Flexible patch for fluid delivery and monitoring body analytes
EP2083878A4 (en) * 2006-10-23 2010-04-28 Abbott Diabetes Care Inc Flexible patch for fluid delivery and monitoring body analytes
US10070810B2 (en) 2006-10-23 2018-09-11 Abbott Diabetes Care Inc. Sensor insertion devices and methods of use
AU2007309070B2 (en) * 2006-10-23 2013-05-23 Abbott Diabetes Care, Inc. Flexible patch for fluid delivery and monitoring body analytes
US11234621B2 (en) 2006-10-23 2022-02-01 Abbott Diabetes Care Inc. Sensor insertion devices and methods of use
US11508476B2 (en) 2006-10-31 2022-11-22 Abbott Diabetes Care, Inc. Infusion devices and methods
US11837358B2 (en) 2006-10-31 2023-12-05 Abbott Diabetes Care Inc. Infusion devices and methods
US9064107B2 (en) 2006-10-31 2015-06-23 Abbott Diabetes Care Inc. Infusion devices and methods
US11043300B2 (en) 2006-10-31 2021-06-22 Abbott Diabetes Care Inc. Infusion devices and methods
US10007759B2 (en) 2006-10-31 2018-06-26 Abbott Diabetes Care Inc. Infusion devices and methods
US8579853B2 (en) 2006-10-31 2013-11-12 Abbott Diabetes Care Inc. Infusion devices and methods
US11883009B2 (en) 2006-11-06 2024-01-30 Aardvark Medical, Inc. Irrigation and aspiration device and method
US11318234B2 (en) 2006-11-06 2022-05-03 Aardvark Medical, Inc. Irrigation and aspiration device and method
US11291751B2 (en) * 2006-11-06 2022-04-05 Aardvark Medical, Inc. Irrigation and aspiration device and methods
US11883010B2 (en) 2006-11-06 2024-01-30 Aardvark Medical, Inc. Irrigation and aspiration device and method
US11889995B2 (en) 2006-11-06 2024-02-06 Aardvark Medical, Inc. Irrigation and aspiration device and method
US8778665B2 (en) 2006-11-14 2014-07-15 Theranos, Inc. Detection and quantification of analytes in bodily fluids
US11802882B2 (en) 2006-11-14 2023-10-31 Labrador Diagnostics Llc Methods for the detection of analytes in small-volume blood samples
US10156579B2 (en) 2006-11-14 2018-12-18 Theranos Ip Company, Llc Methods for the detection of analytes in small-volume blood samples
US9303286B2 (en) * 2006-11-14 2016-04-05 Theranos, Inc. Detection and quantification of analytes in bodily fluids
US20100248277A1 (en) * 2006-11-14 2010-09-30 Ian Gibbons Detection and quantification of analytes in bodily fluids
US8979755B2 (en) * 2006-12-08 2015-03-17 The Boeing Company Devices and systems for remote physiological monitoring
US20080139894A1 (en) * 2006-12-08 2008-06-12 Joanna Szydlo-Moore Devices and systems for remote physiological monitoring
US20080154107A1 (en) * 2006-12-20 2008-06-26 Jina Arvind N Device, systems, methods and tools for continuous glucose monitoring
US8732188B2 (en) 2007-02-18 2014-05-20 Abbott Diabetes Care Inc. Method and system for providing contextual based medication dosage determination
US8930203B2 (en) 2007-02-18 2015-01-06 Abbott Diabetes Care Inc. Multi-function analyte test device and methods therefor
US9095290B2 (en) 2007-03-01 2015-08-04 Abbott Diabetes Care Inc. Method and apparatus for providing rolling data in communication systems
US8123686B2 (en) 2007-03-01 2012-02-28 Abbott Diabetes Care Inc. Method and apparatus for providing rolling data in communication systems
US9801545B2 (en) 2007-03-01 2017-10-31 Abbott Diabetes Care Inc. Method and apparatus for providing rolling data in communication systems
US20080234562A1 (en) * 2007-03-19 2008-09-25 Jina Arvind N Continuous analyte monitor with multi-point self-calibration
US9574914B2 (en) 2007-05-08 2017-02-21 Abbott Diabetes Care Inc. Method and device for determining elapsed sensor life
US8456301B2 (en) 2007-05-08 2013-06-04 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US9177456B2 (en) 2007-05-08 2015-11-03 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8593287B2 (en) 2007-05-08 2013-11-26 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8461985B2 (en) 2007-05-08 2013-06-11 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US10653317B2 (en) 2007-05-08 2020-05-19 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8149117B2 (en) 2007-05-08 2012-04-03 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US9314198B2 (en) 2007-05-08 2016-04-19 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US7928850B2 (en) 2007-05-08 2011-04-19 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8665091B2 (en) 2007-05-08 2014-03-04 Abbott Diabetes Care Inc. Method and device for determining elapsed sensor life
US10952611B2 (en) 2007-05-08 2021-03-23 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US10178954B2 (en) 2007-05-08 2019-01-15 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US9035767B2 (en) 2007-05-08 2015-05-19 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US9649057B2 (en) 2007-05-08 2017-05-16 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8362904B2 (en) 2007-05-08 2013-01-29 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US9000929B2 (en) 2007-05-08 2015-04-07 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US9949678B2 (en) 2007-05-08 2018-04-24 Abbott Diabetes Care Inc. Method and device for determining elapsed sensor life
US11696684B2 (en) 2007-05-08 2023-07-11 Abbott Diabetes Care Inc. Analyte monitoring system and methods
US8613703B2 (en) 2007-05-31 2013-12-24 Abbott Diabetes Care Inc. Insertion devices and methods
US20080312518A1 (en) * 2007-06-14 2008-12-18 Arkal Medical, Inc On-demand analyte monitor and method of use
US9575058B2 (en) 2007-08-06 2017-02-21 Theranos, Inc. Systems and methods of fluidic sample processing
US11754554B2 (en) 2007-08-06 2023-09-12 Labrador Diagnostics Llc Systems and methods of fluidic sample processing
US8158430B1 (en) 2007-08-06 2012-04-17 Theranos, Inc. Systems and methods of fluidic sample processing
US8883518B2 (en) 2007-08-06 2014-11-11 Theranos, Inc. Systems and methods of fluidic sample processing
US8328720B2 (en) 2007-08-10 2012-12-11 Infotonics Technology Center, Inc. MEMS interstitial prothrombin time test
US20090093697A1 (en) * 2007-08-10 2009-04-09 Jose Mir Mems interstitial prothrombin time test
US20090082652A1 (en) * 2007-09-25 2009-03-26 Pacesetter, Inc. Implantable body fluid analyzer
US8192360B2 (en) * 2007-09-25 2012-06-05 Pacesetter, Inc. Implantable body fluid analyzer
US10634667B2 (en) 2007-10-02 2020-04-28 Theranos Ip Company, Llc Modular point-of-care devices, systems, and uses thereof
US9581588B2 (en) 2007-10-02 2017-02-28 Theranos, Inc. Modular point-of-care devices, systems, and uses thereof
US11366106B2 (en) 2007-10-02 2022-06-21 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
US9121851B2 (en) 2007-10-02 2015-09-01 Theranos, Inc. Modular point-of-care devices, systems, and uses thereof
US11899010B2 (en) 2007-10-02 2024-02-13 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
US9588109B2 (en) 2007-10-02 2017-03-07 Theranos, Inc. Modular point-of-care devices, systems, and uses thereof
US9285366B2 (en) 2007-10-02 2016-03-15 Theranos, Inc. Modular point-of-care devices, systems, and uses thereof
US11143647B2 (en) 2007-10-02 2021-10-12 Labrador Diagnostics, LLC Modular point-of-care devices, systems, and uses thereof
US9435793B2 (en) 2007-10-02 2016-09-06 Theranos, Inc. Modular point-of-care devices, systems, and uses thereof
US11061022B2 (en) 2007-10-02 2021-07-13 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
US11199538B2 (en) 2007-10-02 2021-12-14 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
US10900958B2 (en) 2007-10-02 2021-01-26 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
US10670588B2 (en) 2007-10-02 2020-06-02 Theranos Ip Company, Llc Modular point-of-care devices, systems, and uses thereof
US11137391B2 (en) 2007-10-02 2021-10-05 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
US11092593B2 (en) 2007-10-02 2021-08-17 Labrador Diagnostics Llc Modular point-of-care devices, systems, and uses thereof
WO2009081404A1 (en) * 2007-12-26 2009-07-02 Medingo Ltd. System and method for glycemic control
US11045125B2 (en) 2008-05-30 2021-06-29 Intuity Medical, Inc. Body fluid sampling device-sampling site interface
US9833183B2 (en) 2008-05-30 2017-12-05 Intuity Medical, Inc. Body fluid sampling device—sampling site interface
EP2329035A2 (en) * 2008-06-04 2011-06-08 Seventh Sense Biosystems, Inc. Compositions and methods for rapid one-step diagnosis
US11553860B2 (en) 2008-06-06 2023-01-17 Intuity Medical, Inc. Medical diagnostic devices and methods
US9636051B2 (en) 2008-06-06 2017-05-02 Intuity Medical, Inc. Detection meter and mode of operation
US10383556B2 (en) 2008-06-06 2019-08-20 Intuity Medical, Inc. Medical diagnostic devices and methods
US11399744B2 (en) 2008-06-06 2022-08-02 Intuity Medical, Inc. Detection meter and mode of operation
US20120323097A9 (en) * 2008-06-30 2012-12-20 Nemaura Pharma Limited Patch for reverse iontophoresis
US8103456B2 (en) 2009-01-29 2012-01-24 Abbott Diabetes Care Inc. Method and device for early signal attenuation detection using blood glucose measurements
US8473220B2 (en) 2009-01-29 2013-06-25 Abbott Diabetes Care Inc. Method and device for early signal attenuation detection using blood glucose measurements
US9066709B2 (en) 2009-01-29 2015-06-30 Abbott Diabetes Care Inc. Method and device for early signal attenuation detection using blood glucose measurements
US8676513B2 (en) 2009-01-29 2014-03-18 Abbott Diabetes Care Inc. Method and device for early signal attenuation detection using blood glucose measurements
US8560082B2 (en) 2009-01-30 2013-10-15 Abbott Diabetes Care Inc. Computerized determination of insulin pump therapy parameters using real time and retrospective data processing
WO2010086380A1 (en) 2009-01-30 2010-08-05 Pronota N.V. Biomarker for diagnosis, prediction and/or prognosis of acute heart failure and uses thereof
US9993188B2 (en) 2009-02-03 2018-06-12 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
USD957642S1 (en) 2009-02-03 2022-07-12 Abbott Diabetes Care Inc. Analyte sensor inserter
USD955599S1 (en) 2009-02-03 2022-06-21 Abbott Diabetes Care Inc. Analyte sensor inserter
US10786190B2 (en) 2009-02-03 2020-09-29 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US11166656B2 (en) 2009-02-03 2021-11-09 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US11006870B2 (en) 2009-02-03 2021-05-18 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
USD957643S1 (en) 2009-02-03 2022-07-12 Abbott Diabetes Care Inc. Analyte sensor device
US9402544B2 (en) 2009-02-03 2016-08-02 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US9636068B2 (en) 2009-02-03 2017-05-02 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US11202591B2 (en) 2009-02-03 2021-12-21 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
USD882432S1 (en) 2009-02-03 2020-04-28 Abbott Diabetes Care Inc. Analyte sensor on body unit
US11006872B2 (en) 2009-02-03 2021-05-18 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US11006871B2 (en) 2009-02-03 2021-05-18 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US11213229B2 (en) 2009-02-03 2022-01-04 Abbott Diabetes Care Inc. Analyte sensor and apparatus for insertion of the sensor
US10939860B2 (en) 2009-03-02 2021-03-09 Seventh Sense Biosystems, Inc. Techniques and devices associated with blood sampling
US9775551B2 (en) 2009-03-02 2017-10-03 Seventh Sense Biosystems, Inc. Devices and techniques associated with diagnostics, therapies, and other applications, including skin-associated applications
US9730624B2 (en) 2009-03-02 2017-08-15 Seventh Sense Biosystems, Inc. Delivering and/or receiving fluids
US9113836B2 (en) 2009-03-02 2015-08-25 Seventh Sense Biosystems, Inc. Devices and techniques associated with diagnostics, therapies, and other applications, including skin-associated applications
US8821412B2 (en) 2009-03-02 2014-09-02 Seventh Sense Biosystems, Inc. Delivering and/or receiving fluids
US10799166B2 (en) 2009-03-02 2020-10-13 Seventh Sense Biosystems, Inc. Delivering and/or receiving fluids
US8467972B2 (en) 2009-04-28 2013-06-18 Abbott Diabetes Care Inc. Closed loop blood glucose control algorithm analysis
US9226701B2 (en) 2009-04-28 2016-01-05 Abbott Diabetes Care Inc. Error detection in critical repeating data in a wireless sensor system
US11872370B2 (en) 2009-05-29 2024-01-16 Abbott Diabetes Care Inc. Medical device antenna systems having external antenna configurations
US11793936B2 (en) 2009-05-29 2023-10-24 Abbott Diabetes Care Inc. Medical device antenna systems having external antenna configurations
US8798934B2 (en) 2009-07-23 2014-08-05 Abbott Diabetes Care Inc. Real time management of data relating to physiological control of glucose levels
US10872102B2 (en) 2009-07-23 2020-12-22 Abbott Diabetes Care Inc. Real time management of data relating to physiological control of glucose levels
US11635332B2 (en) 2009-08-31 2023-04-25 Abbott Diabetes Care Inc. Analyte monitoring system and methods for managing power and noise
US11045147B2 (en) 2009-08-31 2021-06-29 Abbott Diabetes Care Inc. Analyte signal processing device and methods
US9968302B2 (en) 2009-08-31 2018-05-15 Abbott Diabetes Care Inc. Analyte signal processing device and methods
US10429250B2 (en) 2009-08-31 2019-10-01 Abbott Diabetes Care, Inc. Analyte monitoring system and methods for managing power and noise
USD962446S1 (en) 2009-08-31 2022-08-30 Abbott Diabetes Care, Inc. Analyte sensor device
US8993331B2 (en) 2009-08-31 2015-03-31 Abbott Diabetes Care Inc. Analyte monitoring system and methods for managing power and noise
US9314195B2 (en) 2009-08-31 2016-04-19 Abbott Diabetes Care Inc. Analyte signal processing device and methods
US11150145B2 (en) 2009-08-31 2021-10-19 Abbott Diabetes Care Inc. Analyte monitoring system and methods for managing power and noise
US9750439B2 (en) 2009-09-29 2017-09-05 Abbott Diabetes Care Inc. Method and apparatus for providing notification function in analyte monitoring systems
US9320461B2 (en) 2009-09-29 2016-04-26 Abbott Diabetes Care Inc. Method and apparatus for providing notification function in analyte monitoring systems
US10349874B2 (en) 2009-09-29 2019-07-16 Abbott Diabetes Care Inc. Method and apparatus for providing notification function in analyte monitoring systems
US9750444B2 (en) 2009-09-30 2017-09-05 Abbott Diabetes Care Inc. Interconnect for on-body analyte monitoring device
US9351669B2 (en) 2009-09-30 2016-05-31 Abbott Diabetes Care Inc. Interconnect for on-body analyte monitoring device
US10765351B2 (en) 2009-09-30 2020-09-08 Abbott Diabetes Care Inc. Interconnect for on-body analyte monitoring device
US11259725B2 (en) 2009-09-30 2022-03-01 Abbott Diabetes Care Inc. Interconnect for on-body analyte monitoring device
US9460263B2 (en) 2009-10-19 2016-10-04 Theranos, Inc. Integrated health data capture and analysis system
US11139084B2 (en) 2009-10-19 2021-10-05 Labrador Diagnostics Llc Integrated health data capture and analysis system
US8862448B2 (en) 2009-10-19 2014-10-14 Theranos, Inc. Integrated health data capture and analysis system
US11158429B2 (en) 2009-10-19 2021-10-26 Labrador Diagnostics Llc Integrated health data capture and analysis system
US11195624B2 (en) 2009-10-19 2021-12-07 Labrador Diagnostics Llc Integrated health data capture and analysis system
WO2011048173A1 (en) 2009-10-21 2011-04-28 Pronota N.V. Mcam as a biomarker for fluid homeostasis
WO2011048168A1 (en) 2009-10-21 2011-04-28 Pronota N.V. Biomarker for diagnosis, prediction and/or prognosis of acute heart failure and uses thereof
US11002743B2 (en) 2009-11-30 2021-05-11 Intuity Medical, Inc. Calibration material delivery devices and methods
US9897610B2 (en) 2009-11-30 2018-02-20 Intuity Medical, Inc. Calibration material delivery devices and methods
US8919605B2 (en) 2009-11-30 2014-12-30 Intuity Medical, Inc. Calibration material delivery devices and methods
US9041541B2 (en) 2010-01-28 2015-05-26 Seventh Sense Biosystems, Inc. Monitoring or feedback systems and methods
USD924406S1 (en) 2010-02-01 2021-07-06 Abbott Diabetes Care Inc. Analyte sensor inserter
US11266335B2 (en) 2010-03-24 2022-03-08 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US11064922B1 (en) 2010-03-24 2021-07-20 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US11000216B2 (en) 2010-03-24 2021-05-11 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10010280B2 (en) 2010-03-24 2018-07-03 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10772547B1 (en) 2010-03-24 2020-09-15 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US9265453B2 (en) 2010-03-24 2016-02-23 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
USD987830S1 (en) 2010-03-24 2023-05-30 Abbott Diabetes Care Inc. Analyte sensor inserter
US11013440B2 (en) 2010-03-24 2021-05-25 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10881340B2 (en) 2010-03-24 2021-01-05 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10292632B2 (en) 2010-03-24 2019-05-21 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US9215992B2 (en) 2010-03-24 2015-12-22 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10881341B1 (en) 2010-03-24 2021-01-05 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US9186098B2 (en) 2010-03-24 2015-11-17 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10959654B2 (en) 2010-03-24 2021-03-30 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US8764657B2 (en) 2010-03-24 2014-07-01 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US11246519B2 (en) 2010-03-24 2022-02-15 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US11058334B1 (en) 2010-03-24 2021-07-13 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
USD997362S1 (en) 2010-03-24 2023-08-29 Abbott Diabetes Care Inc. Analyte sensor inserter
US10945649B2 (en) 2010-03-24 2021-03-16 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US9687183B2 (en) 2010-03-24 2017-06-27 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
US10952657B2 (en) 2010-03-24 2021-03-23 Abbott Diabetes Care Inc. Medical device inserters and processes of inserting and using medical devices
USD948722S1 (en) 2010-03-24 2022-04-12 Abbott Diabetes Care Inc. Analyte sensor inserter
EP2924439A1 (en) 2010-03-26 2015-09-30 Mycartis N.V. Ltbp2 as a biomarker for predicting or prognosticating mortality
WO2011128357A2 (en) 2010-04-13 2011-10-20 Pronota N.V. Biomarkers for hypertensive disorders of pregnancy
US9033898B2 (en) 2010-06-23 2015-05-19 Seventh Sense Biosystems, Inc. Sampling devices and methods involving relatively little pain
US10330667B2 (en) 2010-06-25 2019-06-25 Intuity Medical, Inc. Analyte monitoring methods and systems
US9572534B2 (en) 2010-06-29 2017-02-21 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US10959653B2 (en) 2010-06-29 2021-03-30 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US11064921B2 (en) 2010-06-29 2021-07-20 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US10966644B2 (en) 2010-06-29 2021-04-06 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US10874338B2 (en) 2010-06-29 2020-12-29 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US10973449B2 (en) 2010-06-29 2021-04-13 Abbott Diabetes Care Inc. Devices, systems and methods for on-skin or on-body mounting of medical devices
US8561795B2 (en) 2010-07-16 2013-10-22 Seventh Sense Biosystems, Inc. Low-pressure packaging for fluid devices
US11202895B2 (en) 2010-07-26 2021-12-21 Yourbio Health, Inc. Rapid delivery and/or receiving of fluids
US11177029B2 (en) 2010-08-13 2021-11-16 Yourbio Health, Inc. Systems and techniques for monitoring subjects
US8808202B2 (en) 2010-11-09 2014-08-19 Seventh Sense Biosystems, Inc. Systems and interfaces for blood sampling
US11199489B2 (en) 2011-01-20 2021-12-14 Labrador Diagnostics Llc Systems and methods for sample use maximization
US10876956B2 (en) 2011-01-21 2020-12-29 Labrador Diagnostics Llc Systems and methods for sample use maximization
US11644410B2 (en) 2011-01-21 2023-05-09 Labrador Diagnostics Llc Systems and methods for sample use maximization
US9464981B2 (en) 2011-01-21 2016-10-11 Theranos, Inc. Systems and methods for sample use maximization
US10557786B2 (en) 2011-01-21 2020-02-11 Theranos Ip Company, Llc Systems and methods for sample use maximization
US9677993B2 (en) 2011-01-21 2017-06-13 Theranos, Inc. Systems and methods for sample use maximization
US10244981B2 (en) 2011-03-30 2019-04-02 SensiVida Medical Technologies, Inc. Skin test image analysis apparatuses and methods thereof
US9743862B2 (en) 2011-03-31 2017-08-29 Abbott Diabetes Care Inc. Systems and methods for transcutaneously implanting medical devices
US11253179B2 (en) 2011-04-29 2022-02-22 Yourbio Health, Inc. Systems and methods for collection and/or manipulation of blood spots or other bodily fluids
US10188335B2 (en) 2011-04-29 2019-01-29 Seventh Sense Biosystems, Inc. Plasma or serum production and removal of fluids under reduced pressure
US9295417B2 (en) 2011-04-29 2016-03-29 Seventh Sense Biosystems, Inc. Systems and methods for collecting fluid from a subject
US8827971B2 (en) 2011-04-29 2014-09-09 Seventh Sense Biosystems, Inc. Delivering and/or receiving fluids
US9119578B2 (en) 2011-04-29 2015-09-01 Seventh Sense Biosystems, Inc. Plasma or serum production and removal of fluids under reduced pressure
US10835163B2 (en) 2011-04-29 2020-11-17 Seventh Sense Biosystems, Inc. Systems and methods for collecting fluid from a subject
US9480427B2 (en) 2011-05-06 2016-11-01 Roche Diabetes Care, Inc. Lancet
US11051734B2 (en) 2011-08-03 2021-07-06 Intuity Medical, Inc. Devices and methods for body fluid sampling and analysis
US9782114B2 (en) 2011-08-03 2017-10-10 Intuity Medical, Inc. Devices and methods for body fluid sampling and analysis
US11672452B2 (en) 2011-08-03 2023-06-13 Intuity Medical, Inc. Devices and methods for body fluid sampling and analysis
US11382544B2 (en) 2011-08-03 2022-07-12 Intuity Medical, Inc. Devices and methods for body fluid sampling and analysis
US9619627B2 (en) 2011-09-25 2017-04-11 Theranos, Inc. Systems and methods for collecting and transmitting assay results
US9980669B2 (en) 2011-11-07 2018-05-29 Abbott Diabetes Care Inc. Analyte monitoring device and methods
US11051725B2 (en) 2011-12-11 2021-07-06 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
US11051724B2 (en) 2011-12-11 2021-07-06 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
USD915602S1 (en) 2011-12-11 2021-04-06 Abbott Diabetes Care Inc. Analyte sensor device
US11179068B2 (en) 2011-12-11 2021-11-23 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
USD915601S1 (en) 2011-12-11 2021-04-06 Abbott Diabetes Care Inc. Analyte sensor device
US9693713B2 (en) 2011-12-11 2017-07-04 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
US9402570B2 (en) 2011-12-11 2016-08-02 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
US9931066B2 (en) 2011-12-11 2018-04-03 Abbott Diabetes Care Inc. Analyte sensor devices, connections, and methods
USD903877S1 (en) 2011-12-11 2020-12-01 Abbott Diabetes Care Inc. Analyte sensor device
US10543310B2 (en) 2011-12-19 2020-01-28 Seventh Sense Biosystems, Inc. Delivering and/or receiving material with respect to a subject surface
US11612363B2 (en) 2012-09-17 2023-03-28 Abbott Diabetes Care Inc. Methods and apparatuses for providing adverse condition notification with enhanced wireless communication range in analyte monitoring systems
US9968306B2 (en) 2012-09-17 2018-05-15 Abbott Diabetes Care Inc. Methods and apparatuses for providing adverse condition notification with enhanced wireless communication range in analyte monitoring systems
US9636060B2 (en) 2012-12-18 2017-05-02 Abbott Diabetes Care Inc. Dermal layer analyte sensing devices and methods
US10624567B2 (en) 2012-12-18 2020-04-21 Abbott Diabetes Care Inc. Dermal layer analyte sensing devices and methods
US9668686B2 (en) 2013-03-15 2017-06-06 Abbott Diabetes Care Inc. In vivo glucose sensing in an increased perfusion dermal layer
WO2014143452A1 (en) 2013-03-15 2014-09-18 Abbott Diabetes Care Inc. In vivo glucose sensing in an increased perfusion dermal layer
EP2967460A4 (en) * 2013-03-15 2016-10-19 Abbott Diabetes Care Inc In vivo glucose sensing in an increased perfusion dermal layer
US10729386B2 (en) 2013-06-21 2020-08-04 Intuity Medical, Inc. Analyte monitoring system with audible feedback
US20150182157A1 (en) * 2013-12-30 2015-07-02 CardioCanary, Inc. On-Patient Autonomous Blood Sampler and Analyte Measurement Device
US11229382B2 (en) 2013-12-31 2022-01-25 Abbott Diabetes Care Inc. Self-powered analyte sensor and devices using the same
US20170252019A1 (en) * 2014-11-21 2017-09-07 Korea Institute Of Science And Technology Tear collection device
US11185314B2 (en) * 2014-11-21 2021-11-30 Korea Institute Of Science And Technology Tear collection device
US10987039B2 (en) 2014-12-03 2021-04-27 Stmicroelectronics S.R.L. Microneedle array device and method of making
US10674944B2 (en) 2015-05-14 2020-06-09 Abbott Diabetes Care Inc. Compact medical device inserters and related systems and methods
USD980986S1 (en) 2015-05-14 2023-03-14 Abbott Diabetes Care Inc. Analyte sensor inserter
US10213139B2 (en) 2015-05-14 2019-02-26 Abbott Diabetes Care Inc. Systems, devices, and methods for assembling an applicator and sensor control device
WO2017139084A1 (en) * 2016-02-11 2017-08-17 Applied Materials, Inc. Medical bodily fluid sampling device
US10653349B2 (en) * 2016-10-18 2020-05-19 International Business Machines Corporation Diagnostic apparatus
US20180103884A1 (en) * 2016-10-18 2018-04-19 International Business Machines Corporation Diagnostic apparatus
US11071478B2 (en) 2017-01-23 2021-07-27 Abbott Diabetes Care Inc. Systems, devices and methods for analyte sensor insertion
US10925523B2 (en) * 2017-06-02 2021-02-23 Northwestern University Microfluidic systems for epidermal sampling and sensing
US20200205721A1 (en) * 2017-09-07 2020-07-02 The Regents Of The University Of California Multiplexed sweat extraction and sensing wearable device for normalized and time-sequential sweat analysis
US20210093234A1 (en) * 2017-12-11 2021-04-01 Stc.Unm Mild Traumatic Brain Injury Diagnostic Immunochromatographic Microneedle Patch
US20200397352A1 (en) * 2018-03-06 2020-12-24 Xsensio SA System for collection and analysis of biofluid from skin and method of using the same
US11712181B2 (en) * 2018-03-06 2023-08-01 Xsensio SA System for collection and analysis of biofluid from skin and method of using the same
USD1002852S1 (en) 2019-06-06 2023-10-24 Abbott Diabetes Care Inc. Analyte sensor device
EP3753485A1 (en) * 2019-06-20 2020-12-23 Nokia Technologies Oy Electrode apparatuses and methods of forming electrode apparatuses
WO2021076933A1 (en) * 2019-10-16 2021-04-22 Jason Michael Strohmaier Wearable point-of-care devices for assessing immune activity from interstitial fluid and methods of use thereof
USD1006235S1 (en) 2020-12-21 2023-11-28 Abbott Diabetes Care Inc. Analyte sensor inserter
USD999913S1 (en) 2020-12-21 2023-09-26 Abbott Diabetes Care Inc Analyte sensor inserter
USD982762S1 (en) 2020-12-21 2023-04-04 Abbott Diabetes Care Inc. Analyte sensor inserter

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