US20050215923A1 - Fingertip conforming fluid expression cap - Google Patents
Fingertip conforming fluid expression cap Download PDFInfo
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- US20050215923A1 US20050215923A1 US10/811,268 US81126804A US2005215923A1 US 20050215923 A1 US20050215923 A1 US 20050215923A1 US 81126804 A US81126804 A US 81126804A US 2005215923 A1 US2005215923 A1 US 2005215923A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150053—Details for enhanced collection of blood or interstitial fluid at the sample site, e.g. by applying compression, heat, vibration, ultrasound, suction or vacuum to tissue; for reduction of pain or discomfort; Skin piercing elements, e.g. blades, needles, lancets or canulas, with adjustable piercing speed
- A61B5/150061—Means for enhancing collection
- A61B5/150068—Means for enhancing collection by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150358—Strips for collecting blood, e.g. absorbent
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- A—HUMAN NECESSITIES
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150748—Having means for aiding positioning of the piercing device at a location where the body is to be pierced
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
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- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dermatology (AREA)
- Pain & Pain Management (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A bodily fluid sampling device includes an incision forming device to form an incision in a finger and an expression cap. The expression cap has an opening through which the incision forming device forms an incision and an expression surface to express fluid from the incision. The expression surface has at least two opposing compression surfaces with a negative sigmoidal shape to enhance expression of body fluid from the incision. The expression cap defines a relief notch between the compression surfaces, and the relief notch is sized to receive the finger, or some other body part, to permit the compression surfaces to first contact the finger when the expression surface is pressed against the finger.
Description
- The present invention generally relates to bodily fluid sampling devices and more specifically, but not exclusively, to a bodily fluid sampling device with an expression cap that allows a more complete contact with the skin around an incision.
- A variety of devices have been developed to sample bodily fluids. These devices may use a needle to prick a finger or other means of forming an incision in the body. The devices are commonly used on the finger because the finger contains a high density of capillaries full of blood. Other devices are used to take bodily fluid samples from alternate site testing (AST) locations such as the forearm. These AST locations commonly make it less painful for the user; however, the amount of bodily fluid bled from an incision is commonly lower. Typically, the devices are hand held and are placed against the finger or some other body part. An incision is formed and bodily fluid from the incision is drawn onto a test strip or some other testing device. For example, the test strip can be used to determine the levels of selected analytes in the bodily fluid, such the blood glucose levels.
- Sometimes the amount of blood naturally bled from the incision is insufficient for testing purposes, and additional fluid needs to be expressed from the incision before the fluid can be analyzed. Bodily fluid can be expressed from incisions in a number of manners, such as with a vacuum and/or mechanically. In one form, a sampling device with a hollow, cylindrically shaped expression member is pressed around an incision in a finger or some other body part. By pressing the expression member around the incision, the pressure of the bodily fluid in the skin inside the expression member increases so that additional fluid is forced out of the incision. One problem associated with this expression member design is that the contact surface of the expression member is flat, whereas most body parts are not. This flat type of expression member design in turn leads to uneven pressure being applied around the incision, which can block blood flow to the incision, while at the same time allow blood to flow away from the incision site. For example, when a flat expression member is pressed against a finger, uneven pressure is applied around the incision site. Specifically, the expression member blocks the flow of blood in the arteries along the finger, while at the same time allows blood to escape from the sides of the finger. This uneven contact between the expression member and the skin can lead to the user having to attempt to express the fluid over again, and may even require the user to lance the skin again.
- Thus, the need remains for further contributions in this area of technology.
- In one aspect of the present invention, a bodily fluid sampling device includes an incision forming device to form an incision in a finger and an expression cap. The expression cap has an opening through which the incision forming device forms an incision and an expression surface to express fluid from the incision. The expression surface has at least two opposing compression surfaces with a negative sigmoidal shape to enhance expression of body fluid from the incision. The expression cap defines a relief notch between the compression surfaces, and the relief notch is sized to receive the finger, or some other body part, to permit the compression surfaces to first contact the finger when the expression surface is pressed against the finger.
- Another aspect concerns, a bodily fluid sampling device that includes means for forming an incision in a body part and an expression cap. The expression cap defines an opening through which the means for forming the incision forms the incision. The expression cap has an expression surface, and the expression surface defines a relief notch. The expression surface is shaped to apply a generally even force against the body part when expressing body fluid from the incision.
- A further aspect concerns a technique for expressing body fluid. A sampling device has an expression surface with at least two opposing compression surfaces that have a negative sigmoidal shape and a relief notch defined between the compression surfaces that is shaped to generally conform to a body part. The expression surface is placed against the body part with at least a portion of the body part received in the relief notch. An incision is formed in the body part with the sampling device, and the body fluid is expressed from the incision by exerting pressure between the body part and the expression surface.
-
FIG. 1 is a perspective view of an expression cap of a bodily fluid sampling device according to one embodiment of the present invention. -
FIG. 2 is a top plan view of theFIG. 1 expression cap. -
FIG. 2A is a top plan of an alternate embodiment of an expression cap. -
FIG. 3 is a cross-sectional view of theFIG. 1 expression cap taken along line 3-3 inFIG. 2 . -
FIG. 4 is a cross-sectional view of the tip of theFIG. 1 expression cap along line 4-4 inFIG.3 . -
FIG. 5 is an exploded view of a bodily fluid sampling device that incorporates theFIG. 1 expression cap. -
FIG. 6 is a cross-sectional view of theFIG. 5 device. -
FIG. 7 is a cross-sectional view of theFIG. 5 device during lancing of a finger. -
FIG. 8 is a cross-sectional view of theFIG. 5 device expressing fluid from the finger. -
FIG. 9 is a side view of the expression cap ofFIG. 1 . - For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended. Any alterations, modifications, and further applications of the principles of the present invention as illustrated are contemplated as would normally occur to one skilled in the art to which the invention relates.
- A bodily fluid sampling device according to one embodiment includes an expression cap having an expression surface with a relief area to allow an improved contact between the expression surface and the body area from which bodily fluid is to be sampled. The relief area centers the contact area around the incision formed in the body part. The combination of a concave expression surface with the relief area creates a more even compressive force to help express the fluid out of the body part contacting the expression surface.
- An
expression cap 20 according to one embodiment, among others, is illustrated inFIGS. 1, 2 , 3, and 4. Theexpression cap 20 is configured to express fluid from the area surrounding an incision. Referring toFIG. 1 , theexpression cap 20 includes anexpression portion 21 that is configured to contact the skin around an incision, asupport portion 22 to support theexpression portion 21 when a body part is pressed against theexpression portion 21, and aconnection portion 23 that allows theexpression cap 20 to be connected to a sampling device. Theexpression cap 20 may be composed of various materials including, but not limited to, plastic, rubber, metal, a composite material, a combination thereof, or other materials commonly known to one skilled in the art. In one embodiment, theexpression portion 21 is able to be detached from thesupport portion 22. Conversely, it is contemplated that theexpression portion 21 in other embodiments can be permanently affixed to thesupport portion 22. Theexpression portion 21 generally includes anexpression surface 24 configured to contact the skin surrounding an incision and alancet opening 25 adapted to allow a lancet to pass through theexpression portion 21 during lancing. The lancet opening 25 is illustrated as being circular. Nonetheless, it should be understood that the lancet opening 25 can be shaped differently in other embodiments. For example, thelancet opening 25 can be rectangular, square and/or an irregularly shaped in other embodiments. - As illustrated, the
expression surface 24 hasrelief notches 26 that improve the contact with the skin surrounding theexpression surface 24. In the illustrated embodiment, therelief notches 26 are shaped to generally conform to the shape of a finger, but it should be appreciated that thenotches 26 can be shaped to conform to other body parts, such as the forearm. By generally conforming to the shape of the finger, therelief notches 26 permit a generally even pressure to be applied against the skin around the incision, which in turn increases the amount of fluid expressed from an incision. In the illustrated embodiment, theexpression surface 24 surrounding thenotches 26 has a negative sigmoid shape because it was discovered that the negative sigmoid shape of theexpression surface 24 in conjunction with therelief notches 26 was particularly effective in expressing fluid. The negative sigmoid shape of theexpression surface 24 promotes fluid flow from the sides of the finger towards the incision. In one embodiment, therelief notches 26 can be configured to not cut off the circulatory flow of blood in the arteries along the finger, thereby permitting an even greater blood flow from the incision. - The
support portion 22 includes adepression 27 for gripping theexpression cap 20. In this embodiment, thedepression 27 is depicted having a parabolic shape, but it is envisioned that the depression can be shaped differently in other embodiments. In one form, thedepression 27 is shaped to conform to human fingers for easy grasping of theexpression cap 20 during insertion or removal of theexpression cap 20 from a sampling device. As illustrated inFIG. 1 , thesupport portion 22 has a larger diameter than theconnection portion 23. The larger diameter of thesupport portion 22 catches theexpression cap 20 when theconnection portion 23 is inserted into a sampling device. - Referring now to
FIG. 2 , theexpression portion 21 is illustrated as having an overall cylindrical shape. However, it should be understood that the shape of theexpression portion 21 can vary in other embodiments. For example, theexpression portion 21 in other embodiments can be rectangular in shape. Theexpression portion 21 includes abeveled edge 32 that runs along the circumference of theexpression portion 21. As shown, therelief notches 26 include afirst relief notch 33 and asecond relief notch 34. Therelief notches 26 are aligned directly across from one another along theexpression surface 24 so as to coincide with a finger laying across thenotches 26. In alternative embodiments, thefirst relief notch 33 and thesecond relief notch 34 can be placed in different locations uponexpression surface 24. In the illustrated embodiment, therelief notches 26 have a concave or curved shape so as to coincide with the shape of a finger. However, it should be appreciated that therelief notches 26 can be shaped and sized differently so as to coincide with the shape of other body parts, such as the forearm. Moreover, it is contemplated that theexpression surface 24 can include more orless relief notches 26 than is illustrated. - With continued reference to
FIG. 2 , theexpression surface 24 further has opposing first 37 and second 38 compression surfaces for applying a compressive force against the skin surrounding the incision during expression of fluid from the incision. Located around thelancet opening 25, the compression surfaces 37, 38 have afirst basin 39 and asecond basin 40. Thebasins basins expression area 41, which is illustrated in FIG. 2 as the area surrounded by dotted lines. In one embodiment, therelief notches 26 are sized and shaped so that generally only theexpression area 41 of theexpression surface 24 contacts the skin during expressing fluid. With theexpression area 41 contacting the skin, blood flow in the arteries towards the incision is permitted; while at the same time pressure of the blood within the skin surrounding the incision can be increased. In another embodiment, therelief notches 26 are configured so that skin also contacts theexpression surface 24 inside therelief notches 26. - In
FIG. 2 , theexpression surface 24 is generally smooth, but it should be appreciated that theexpression surface 24 can be textured in other embodiments. Theexpression surface 24 can be textured so as to promote expression of fluid from an incision by directing blood flow in the skin towards the incision. Moreover, the texturing of theexpression surface 24 can increase friction between the skin and theexpression surface 24, thus ensuring that the incision remains centered in thelancet opening 25. One example of texturing for anexpression surface 24 a is illustrated inFIG. 2A . As shown, theexpression surface 24 a incorporatesridges 42. Theridges 42 can be oriented in a number of manners to promote blood flow. Theridges 42 can be oriented to form concentric ring pattern, a spiral pattern as well as other patterns, for example. In other embodiments, theexpression surface 24 can be covered with small spherical shapes, bumps, cones, rods, dimples, and/or other texturing. - With reference to
FIGS. 3 and 4 , therelief notches 26 in the illustrated embodiment are sized deeply enough to ensure that the skin surrounding the incision mainly contacts the compression surfaces 37, 38 when pressed against theexpression surface 24. Nevertheless, therelief notches 26 in other embodiments are shallower so that the skin contacts therelief notches 26 and the compression surfaces 37, 38 at the same time, whereby the pressure exerted by theexpression portion 21 is applied evenly around the incision. Opposite theexpression surface 24, theexpression portion 21 has arim 45 that extends from the outer periphery of theexpression portion 21. In one embodiment, therim 45 has aninside rim surface 49 that is used to frictionally secure theexpression portion 21 to thesupport portion 22 of thecap 20. However, as mentioned before, it should be appreciated that theexpression portion 21 can be secured to thesupport portion 22 in other manners and/or theexpression portion 21 can be integrally formed with thesupport portion 22. InFIGS. 3 and 4 , thecompression surface 37 is depicted as gradually rising from thenotches 26 to atop surface 47 that is generally flat when viewed on end. In other embodiments, thetop surface 47 ofcompression surface 37 can be shaped differently. For instance, thetop surface 47 in other embodiments can be saddle shaped such that thetop surface 47 is curved with an apex located in its middle. - As depicted in
FIG. 4 , the compression surfaces 37, 38 have a negative sigmoid shape to enhance the expression of fluid from the incision. In the illustrated embodiment, the first 37 and second 38 compression surfaces respectively have first 51 and second 53 side ridges. At theside ridges relief notches cap 20 does not contact the finger in therelief notches 26 when thecap 20 is pressed against the finger so as to promote fluid flow from the incision. It is envisioned that in other forms thecap 20 contacts finger in therelief notches 26 - A bodily
fluid sampling device 57, according to one embodiment, that incorporates theexpression cap 20 is illustrated inFIG. 5 . As shown, thesampling device 57 includes abody 59 and anincision forming device 61 for forming an incision in the skin. In the illustrated embodiment, theincision forming device 61 includes a lancet, but it is contemplated that theincision forming device 61 can include other types of devices, such as a needle, laser, and/or a pneumatic needle, to name a few. Thebody 59 of thesampling device 57 is configured to actuate theincision forming device 61 to form the incision. Moreover, it should be appreciated that thebody 59 in other embodiments can incorporate sensors for analyzing a fluid sample and a display for displaying the results of a test such that the sampling device is able to draw, collect and analyze a fluid sample in a single step. - The
cap 20 is detachably secured to thebody 59 to permit removal and replacement of thecap 20. To improve hygiene, theexpression cap 20 in one embodiment is disposable; that is, theexpression cap 20 is discarded and replaced with a new one after every test. It is contemplated that in other embodiments thecap 20 can be non-disposable such that it is removed and cleaned after every test. As shown inFIG. 6 , the expression cap is attached to thesupport portion 22 atjunction 63. In the illustrated embodiment, theexpression cap 20 is secured to thebody 59 via a tight interference fit, and thesupport portion 22 and theconnection portion 23 are flexible to allow easy insertion and removal of theexpression cap 20. However, other techniques of attaching theexpression cap 20 to the body are contemplated. By way of a few nonlimiting examples, thecap 20 can be secured to thebody 59 with adhesives, cooperating grooves or notches. In alternate embodiments, theexpression cap 20 and thebody 59 are permanently affixed to one another, and in still yet another embodiment, thecap 20 and thebody 59 are coupled to one another in an adjustable manner to allow for variable lancing depths. To allow disposal, replacement and/or cleaning of theexpression portion 21 of thecap 20, theexpression portion 21 in one embodiment is detachably secured to thesupport portion 22 atjunction 65 via a friction fit. However, in another embodiment, theexpression portion 21 is permanently affixed to thesupport potion 22. - As depicted in
FIG. 6 , theincision forming device 61 includes alancet 67 that that is coupled to alancet driver 69. During lancing, thelancet driver 69 drives thelancet 67 into the skin to form an incision. After forming the incision, thelancet driver 69 retracts the lancet from the incision. In one form, thelancet driver 69 includes springs for firing and retracting thelancet 67, and in another form, thelancet driver 69 includes an electric motor that is used to fire and retract thelancet 67. Nevertheless, it should be appreciated that thelancet driver 69 can incorporate other types of devices for firing and retracting thelancet 67. To reduce the risk of contamination, thelancet 67 can be discarded or cleaned after use. - A technique for collecting and analyzing body fluid with the
sampling device 57 will now be described with reference toFIGS. 7, 8 and 9. Although the technique will be described with reference to collecting and analyzing a sample of blood, it should be appreciated that this technique can be used to collect and analyze other types of fluids, such as interstitial fluid. Before lancing, afinger 71 is placed in contact with theexpression cap 20 such that a portion of thefinger 71 is received in therelief notches 26. As shown inFIG. 9 , the compression surfaces 37, 38 contact the sides of thefinger 71. Once thefinger 71 is in position, thelancet driver 69 fires thelancet 67 to form an incision in thefinger 71, as is depicted inFIG. 7 . As should be appreciated, thelancet driver 69 can be fired manually by the user or automatically by thedevice 57. Once the incision is formed, thelancet driver 69 retracts thelancet 67 from thefinger 71 to allow blood flow from the incision. - After the incision is formed, a force F is applied by the
cap 20 against thefinger 71 to express fluid from thefinger 71, as is illustrated inFIG. 8 . The force F can be applied in a number of manners. For example, in one embodiment, the user presses thefinger 71 against theexpression cap 20 to express fluid. In another embodiment, the user manually presses thesampling device 57 against thefinger 71 to express fluid, and in still yet another embodiment, thesampling device 57 automatically applies the force F against thefinger 71. Nevertheless, it should be appreciated that the force F can be applied in other manners. In one embodiment, the surface area of the portion of thefinger 71 that contacts theexpression cap 20 is between about 0.2 to 0.6 square inches, and it was discovered that the size of this contact area enhances fluid flow from the incision. As thecap 20 is pressed against the finger, abulge 73 on thefinger 71 is created by the compressive forces applied by the compression surfaces 37, 38, and the blood is forced by the compression surfaces 37, 38 in direction A towards the incision.Body fluid 75 from the incision collects on the skin in the form of a drop. - In the illustrated embodiment, the
body fluid 75 on thefinger 71 is collected ontest media 77 that disposed inside theexpression 20. Thetest media 77 in the illustrated embodiment is in the form of a test strip that is used to analyze thebody fluid 75. It is contemplated that the fluid 75 can be collected and analyzed in other manners. For example, thetest media 77 can include an integrated lancing test strip in which thelancet 67 and thetest strip 77 are configured as a unitary device that is able to lance the skin, sample the fluid and analyze the fluid sample. As should be appreciated, analyte levels can be determined through the chemical, electrical, electrochemical and/or optical properties of the bodily fluid sample collected on the test media, to name a few. For example, thetest media 77 as illustrated is a chemically reactive reagent test strip. Typically, reagent test strips are sensitive to thermal and/or chemical processes required for sterilization. The sterilization process can effect the results generated by thetest media 77, and therefore, recalibration of thetest media 77 is required after sterilization. In the embodiment illustrated inFIG. 8 , thelancet 67 can be separately sterilized when theexpression cap 20 is removed. Thetest media 77 does not have to go through the same sterilization process as thelancet 67. After sterilization of thelancet 67, theexpression cap 20 can be connected to thebody 59, thereby eliminating the need to recalibrate thetest media 77. - While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
Claims (22)
1. A bodily fluid sampling device, comprising:
an incision forming device to form an incision in a finger; and
an expression cap defining an opening through which the incision forming device forms an incision, the expression cap having an expression surface to express fluid from the incision, the expression surface having at least two opposing compression surfaces with a negative sigmoidal shape to enhance expression of body fluid from the incision, the expression cap defining a relief notch between the compression surfaces, the relief notch being sized to receive the finger to permit the compression surfaces to first contact the finger when the expression surface is pressed against the finger.
2. The sampling device of claim 1 , wherein:
the expression cap includes a support portion and an expression portion detachably coupled to the support portion, wherein the expression portion is detachable from the support portion to allow cleaning of the expression portion.
3. The sampling device of claim 1 , further comprising a testing device disposed in the expression cap for analyzing the fluid from the incision.
4. The sampling device of claim 1 , wherein the expression surface is textured to enhance expression of fluid from the incision.
5. The sampling device of claim 4 , wherein the expression surface defines a plurality of ridges.
6. The sampling device of claim 1 , wherein the relief notch extends on opposite sides of the opening.
7. The sampling device of claim 1 , further comprising a device body coupled to the expression cap.
8. The sampling device of claim 7 , wherein the expression cap is removable from the device body.
9. A bodily fluid sampling device, comprising:
means for forming an incision in a body part; and
an expression cap defining an opening through which the means for forming the incision forms the incision, the expression cap having an expression surface, the expression surface defining a relief notch, wherein the expression surface is shaped to apply a generally even force against the body part when expressing body fluid from the incision.
10. The sampling device of claim 9 , wherein the expression surface has a negative sigmoid shape.
11. The sampling device of claim 9 , wherein the expression surface has a saddle shape.
12. The sampling device of claim 9 , wherein the relief notch extends across the opening.
13. The sampling device of claim 9 , wherein the expression cap has a generally cylindrical shape.
14. The sampling device of claim 9 , wherein an area of contact between the expression surface and the body part has a surface area between about 0.2 to 0.6 square inches.
15. A method, comprising:
providing a sampling device that has an expression surface with at least two opposing compression surfaces that have a negative sigmoidal shape and a relief notch defined between the compression surfaces that is shaped to generally conform to a body part;
placing the expression surface against the body part with at least a portion of the body part received in the relief notch;
forming an incision in the body part with the sampling device; and
expressing body fluid from the incision by exerting pressure between the body part and the expression surface.
16. The method of claim 15 , wherein the expression surface has a negative sigmoid shape.
17. The method of claim 15 , further comprising analyzing the body fluid with the sampling device.
18. The method of claim 15 , further comprising keeping the sampling device in place against the body part during said forming and said expressing.
19. The method of claim 15 , wherein said placing the expression surface against the body part occurs before said expressing the body fluid.
20. The method of claim 15 , wherein said expressing includes pressing the body part against the expression surface.
21. The method of claim 15 , wherein said expressing includes pressing the expression surface against the body part.
22. The method of claim 15 , wherein:
the sampling device includes an incision forming device;
the expression surface defines an opening; and
said forming the incision includes forming the incision through the opening with the incision forming device.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US10/811,268 US20050215923A1 (en) | 2004-03-26 | 2004-03-26 | Fingertip conforming fluid expression cap |
PCT/US2005/009676 WO2005096943A1 (en) | 2004-03-26 | 2005-03-24 | Fingertip conforming fluid expression cap |
EP05732978A EP1732445A1 (en) | 2004-03-26 | 2005-03-24 | Fingertip conforming fluid expression cap |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US10/811,268 US20050215923A1 (en) | 2004-03-26 | 2004-03-26 | Fingertip conforming fluid expression cap |
Publications (1)
Publication Number | Publication Date |
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US20050215923A1 true US20050215923A1 (en) | 2005-09-29 |
Family
ID=34964881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/811,268 Abandoned US20050215923A1 (en) | 2004-03-26 | 2004-03-26 | Fingertip conforming fluid expression cap |
Country Status (3)
Country | Link |
---|---|
US (1) | US20050215923A1 (en) |
EP (1) | EP1732445A1 (en) |
WO (1) | WO2005096943A1 (en) |
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