US20130310667A1 - Foldable sensor device and method of using same - Google Patents
Foldable sensor device and method of using same Download PDFInfo
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- US20130310667A1 US20130310667A1 US13/672,506 US201213672506A US2013310667A1 US 20130310667 A1 US20130310667 A1 US 20130310667A1 US 201213672506 A US201213672506 A US 201213672506A US 2013310667 A1 US2013310667 A1 US 2013310667A1
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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
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6825—Hand
- A61B5/6826—Finger
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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
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring 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 optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring 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 optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring 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 optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring 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 optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
- A61B5/14552—Details of sensors specially adapted therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6824—Arm or wrist
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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
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/683—Means for maintaining contact with the body
- A61B5/6838—Clamps or clips
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
- A61B2562/164—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted in or on a conformable substrate or carrier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Abstract
A physiologic sensor device configured to be placed on an appendage. The sensor device includes a foldable portion designed to be deformed around the tip of the appendage. In some embodiments the foldable portion is a soft compressible material. In other embodiments a stabilization component is provided to isolate sensing elements from external forces. Some embodiments also include a deformable frame that folds in response to a bending force as the sensing device is placed on the appendage. The deformable frame holds the sensor device in place until another bending force is applied. In other embodiments the frame and/or sensor elements are removable and disposable relative to other components of the sensor device.
Description
- This application is a continuation of and claims the benefit of priority under 35 U.S.C. §120 to U.S. patent application Ser. No. 11/679,595, entitled “FOLDABLE SENSOR DEVICE AND METHOD OF USING SAME,” filed on Feb. 27, 2007, which is hereby incorporated by reference herein in its entirety.
- The present disclosure is directed to physiologic sensors. More specifically, the present disclosure is directed to a sensor device that can be folded to conform about an appendage by a patient or care provider.
- Pulse oximetry involves the non-invasive monitoring of oxygen saturation level in blood-profused tissue indicative of certain vascular conditions. Pulse oximetry is typically used to measure various blood flow characteristics including, but not limited to, the blood-oxygen saturation of hemoglobin in arterial blood, the volume of individual blood pulsations supplying the tissue, and the rate of blood pulsations corresponding to each heartbeat of a patient. Measurement of these characteristics has been accomplished by use of a non-invasive sensor which passes light through a portion of the patient's tissue where blood perfuses the tissue, and photoelectrically senses the absorption of light in such tissue. The amount of light absorbed is then used to calculate the amount of blood constituent being measured. Oxygen saturation may be calculated using some form of the classical absorption equation know as Beer's law. The light passed through the tissue is typically selected to be of one or more wavelengths that are absorbed by the blood in an amount representative of the amount of the blood constituent present in the blood. The amount of transmitted light passed through the tissue will vary in accordance with the changing amount of blood constituent in the tissue and the related light absorption. For measuring blood oxygen level, such sensors have been provided with light sources and photodetectors that are adapted to operate at two or more different wavelengths, in accordance with known techniques for measuring blood oxygen saturation.
- Known pulse oximetry sensors include an optical element which uses a pair of light emitting diodes (LEDs) to direct light through blood-perfused tissue, with a photodetector receiving light which has not been absorbed by the tissue. Accurate pulse oximeter measurements require relatively stable positioning of the sensor on an appendage, as well as proper alignment between the light source and light detector.
- Accurate measurement of oxygen saturation levels are predicated upon optical sensing in the presence of arterial blood flow. A finger provides a convenient access to a body part through which light will readily pass. Other body appendages may also be used, e.g., toes and ears. Local vascular flow in a finger is dependent on several factors which affect the supply of blood. Blood flow may be affected by centrally mediated vasoconstriction, which must be alleviated by managing the perceived central causes. Peripheral constriction via external compression, however, can be induced by local causes. One such cause of local vasocompression is the pressure exerted by the sensor on the finger.
- Many currently available pulse oximetry finger sensors have a hard shell which is maintained upon the finger tip by spring action. Since excess pressure on the finger can distort or eliminate the pulsation in the blood supply to the finger, these springs are intentionally relatively weak. The result of this compromise is that the spring-held sensors readily fall off the finger. Resilient polymer sensors are also known, such as disclosed in US Patent Publication No. 20060106294, incorporated by reference herein and assigned to Nonin Medical, Inc., the assignee of the present application. One limitation of these types of sensors has been user discomfort, particularly during extended periods of sensor use.
- Many known non-disposable oximeter sensors are relatively bulky and exhibit a relatively high inertia of the housing relative to the finger. This results in a susceptibility to disturbance between the sensor and the finger surface as the patient's hand is moved. This relative motion manifests itself as motion artifacts in the detected signal. Motion artifacts, for example caused by tension on the lead wire, are especially problematic for pulse oximeter systems.
- Pulse oximeter sensors are used in a number of applications where they are susceptible to being disturbed or displaced entirely from the appendage. Many oximeter finger sensors locate the lead wire from the sensor over a central portion of a patient's finger. When the patient flexes or curls his finger, the lead wire is often pulled against the sensor causing the light elements to be displaced.
- The present invention is directed to a medical sensor device configured to be placed on an appendage of, for example, a patient. The sensor device is adapted to conform to an appendage upon application of an external folding force. The sensor device includes a portion designed to fold around the appendage and position optical sensor elements on or near a tissue surface of the appendage. In some embodiments the foldable portion includes a soft compressible material. In some embodiments a stabilization component is provided. The stabilization component helps keep the sensor device in place when inadvertently disturbed, for example, by an external force. Some embodiments also include a flexible stiffening portion or frame that is folded over as the sensor device is folded on the appendage. The flexible stiffening portion or frame tends to maintain the sensor device comfortably in place until it is repositioned or removed.
- The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims. The novel features which are believed to be characteristic of the invention, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present invention.
- For a more complete understanding of the present invention, reference is now made to the following descriptions taken in conjunction with the accompanying drawing, in which:
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FIG. 1A is a top view of a sensor device according to one illustrative embodiment; -
FIG. 1B is a cut away view of the sensor device; -
FIG. 1C is a bottom view of the sensor device; -
FIG. 1D is a partially exploded top view of the sensor device; -
FIG. 2 is a diagrammatic view of the sensor device in place over a finger; -
FIG. 3A is a is a diagrammatic view of a pulse oximeter according to an alternative embodiment; -
FIG. 3B illustrates the pulse oximeter on a finger according to one embodiment; -
FIG. 4A is a is a diagrammatic view of a pulse oximeter according to an alternative embodiment; -
FIG. 4B illustrates the pulse oximeter on a finger according to one embodiment -
FIG. 1A is a top view of a sensor according to one illustrative embodiment.FIG. 1B is a side view of the sensor cut taken along line B-B ofFIG. 1A .FIG. 1C is a bottom view of the sensor.FIG. 1D is a partially exploded top view of the sensor. For purposes of this discussionFIGS. 1A , 1B, 1C and 1D will be discussed together. In one embodiment,sensor 100 is a pulse oximeter sensor utilized within a pulse oximetry system. For the purposes of explanation only,sensor 100 is configured for the measurement of oxygen saturation through known oximetric transmittance techniques. As one skilled in the art can readily appreciate, the present invention is easily adaptable to accommodate a number of different physiological monitoring applications and configurations, including but not limited to, other optical sensors, reflective sensor, etc. -
Sensor 100 includes foldable portion (or member or substrate) 130,optical sensor elements link including lead 140 which couplessensor 100, for example, to a monitor. A pulse oximeter system is configured to measure blood oxygenation levels byfitting sensor 100 over at least a portion of a phalange (such as a finger or toe) of the body.Sensor 100 could also be placed on other body parts, e.g., ears and nose. -
Foldable portion 130 in some embodiments is made from two different materials. These two materials are designated as atop material 133 andbottom material 137. However, other arrangements can be envisioned.Top material 133 is disposed on a top portion offoldable portion 130. Conversely,bottom material 137 is disposed on a bottom portion offoldable portion 130. When folded around an appendage thetop material 133 forms the outside of the pulse oximeter, andbottom material 137 forms the inside of the sensor in direct contact with the finger surface. - Foldable materials for use in
foldable portion 130 include, but are not limited to, foams, plastics, fabrics, leathers, papers and other materials in cellular form. In someembodiments materials sensor 100 to be both resilient and provide cushioning. In oneembodiment material 137 is a readily compressible polyethylene foam. However, other cushioning, compressible or foam materials can be used forbottom material 137.Top material 133 is, in one embodiment, also a polyethylene foam. However, unlikebottom material 137, the polyethylene foam oftop material 133 is significantly more dense and less compressible thanbottom material 137. Further, in some embodiments,top material 133 can include a protective layer or coating on anoutside portion 134 that both protects the underlying material(s). Again, other materials can be used fortop material 133. In other embodiments the top and bottom materials can be the same material with no noticeable differentiation between the two materials. - Disposed at an
interface 136 betweenmaterials deformable frame 131. However, in other embodiments frame 131 can be located elsewhere, such as on the outside of eithermaterial Frame 131 is in one embodiment a rigid material (as compared tomaterials 133 or 137) that is readily folded over and deformed from a flat form into a curved shape. Once bent into a shape, such as during application ofsensor 100 to a finger,frame 131 tends to substantially maintain its shape until such time as an additional bending force is applied. In one embodiment,frame 131 is initially generally flat so thatsensor 100 can be shipped flat and then deformed into positioned over the finger prior to use. Preferably,frame 131 andmaterials optical sensor elements embodiment frame 131 is a metal wire that is disposed near an outer perimeter ofsensor 100. However,frame 131 can utilize other materials or be of different cross-sectional shape. For example,frame 131 may include a metal stamping or die-cut part.Frame 131 may be a disposable component within a sensor device kit.Frame 131 is preferably formed from a malleable material. - Disposed within
foldable portion 130 is the pair ofoptical sensor elements element 150 includes a pair of light emitting diodes (LED) andelement 155 is a photodiode. Other illumination methods can be used. In oneembodiment LEDs 150 include one LED emitting red light having a wavelength of 660 nm, and a second LED emitting infrared light having a wavelength of 910 nm. However, other wavelengths that produce red and infrared light can be used. In alternative embodiments ofsensor 100, alternative or additional LEDs can be used. -
Photodiode 155 is arranged to receive light signals fromLEDs 150 during an optical sensing process. In one embodiment,photodiode 155 receives both red and infrared light that has passed fromLEDs 150 through the finger.Photodiode 155 provides a signal coupled throughlead 140 to, for example, a remote monitor for further processing and interpretation. In alternative embodiments,LEDs 150 can be collocated next to or nearphotodiode 155. For example,LEDs 150 andphotodiode 155 may be provided adjacent each other to facilitate a reflectance-type optical sensing process instead of the above described transmittance-type sensing. - In some
embodiments sensor elements foldable portion 130. When such elements are disposed on a separate sheet,foldable portion 130 may have a slit or other opening to allow the insertion ofsensor elements optical sensor elements foldable portion 130 during use and subsequently removed and disposed. In yet another embodiment,frame 131,foldable portion 130 andsensor elements - In some embodiments
foldable portion 130 also includes afinger hole 120 used to assist in proper positioning ofsensor 100 upon a finger. More particularly,finger hole 120 can assist in proper alignment ofsensor elements Finger hole 120 is in one embodiment an aperture throughfoldable portion 130.Finger hole 120 is defined in some embodiments by twoseparate radii finger hole 120 can be replaced with an indent or bump withinfoldable portion 130. This indent or bump can be present inbottom material 137 ortop material 133 and felt by a patient upon application ofsensor device 100 on a finger. -
Foldable portion 130 in some embodiments includes a number of holes orapertures 135.Holes 135 are arranged infoldable portion 130 to allow for air flow circulation across finger surfaces covered bysensor 100. Depending on the selection of materials offoldable portion 130, in someembodiments apertures 135 are not needed as the materials offoldable portion 130 are selected to provide sufficient breathability to covered finger surfaces. - In some embodiments
foldable portion 130 ofsensor 100 includes acurved portion 110.Curved portion 110 is shaped such that whensensor 100 is folded over a finger the curved portion is positioned, in one embodiment, between the first and second knuckle of the finger which allows for natural movement of the finger, yet resists rotation ofsensor 100 upon the finger. However, this feature need not be present in all embodiments. Additionally, depending on the size of the finger, the location ofcurved portion 110 relative to the finger knuckles can change. - In some embodiments
foldable portion 130 includes deformable “winglet” ends 112 near, for example,curved portion 110 which can be deformed to provide a more secure attachment ofsensor 100 to the finger or other appendage. Winglet ends 112, in one embodiment, are embodied as a widened portion ofsensor 100 as compared to a width proximate tofinger hole 120. As shown inFIGS. 2 and 4B , winglet ends 112 can be configured in one embodiment to allowsensor 100 to be folded over upon a finger tip with portions ofsoft foam material 137 engaging each other without respective portions ofharder cover material 133 engaging each other. -
Lead 140 is in one embodiment a series of wires that are connected to a remote monitoring device. The remote monitoring device can be in the same room as the patient or can be located elsewhere. However, in some embodiments a wireless communication component may be provided upon or withinsensor 100 to communicate to a remote monitor via one of many known medical device wireless protocols (e.g., BLUETOOTH). -
FIG. 2 is a diagrammatic view ofsensor 100 upon a finger 200. In this figure,sensor 100 has been folded over the finger.Curved portion 110 is illustrated interfacing with the bottom of the finger between the first and second knuckle.Lead 140 is shown following along the hand and away from the body. The tip of the finger can be observed protruding slightly fromaperture 120.Frame 131 is holdingsensor 100 in the desired position. - For purposes of completeness a brief description of a process of using
sensor 100 will be provided. In one embodiment,sensor 100 is provided in a generally flat form. A finger tip then engages the flattenedsensor 100 atfinger hole 120. Once the finger tip has been aligned with the finger hole 120 (assisted, for example, bydual radii 121, 122) the user or caregiver then foldssensor 100 over and around the finger. During thisfolding process frame 131 is deformed around the finger. The bending process deformsframe 131 andfoldable portion 130 and allowssensor 100 to remain comfortably in place upon the finger. -
FIG. 3A is a diagrammatic view of apulse oximeter 300 according to an alternative embodiment of the present invention. For purposes of simplicity, reference numbers inFIG. 3A that correspond to reference numbers inFIGS. 1A-1D refer to the same or similar features. -
Sensor 300 includescurved portion 110,foldable portion 130, communications lead 140, andstabilization component 350. In such anembodiment sensor 300 is configured to provide additional stabilization to resist disturbance ofoptical sensor elements sensor 300 throughlead 140, e.g., by pulling onlead 140. Such contact withlead 140 may causesensor elements -
Stabilization component 350 helps prevent the inadvertent movement ofsensors sensor 300.Stabilization component 350 includesfirst aperture 353,second aperture 357 andbridge portion 355. In some embodiments,frame 131 is present as well withinstabilization component 350.Apertures sensor 300 on a patient, a finger is inserted from the bottom ofsensor 300 throughaperture 353, oversupport bridge 355 and then throughaperture 357. Once the finger is placed throughapertures finger hole 120.Foldable portion 130 is then folded over the finger, as described above, such that a desired application is provided. -
FIG. 3B illustratessensor 300 on a finger according to one embodiment. In thisconfiguration stabilization component 350 engages upper and lower finger surfaces away fromoptical sensor elements sensor 300 upon the finger. In one embodiment, forces applied to communications link 140 are transferred through thestabilization component 350 to the finger. For a small external force, thestabilization component 350 transfers the force to finger surfaces engaged by thestabilization component 350 without causing disturbance tosensor elements sensor 300, thestabilization component 350 isolates theoptical sensor elements -
FIGS. 4A and 4B illustrate yet another embodiment of asensor 400 in accordance with the present invention. The components ofpulse oximeter 400 are similar to those ofpulse oximeter 100 inFIGS. 1A-1D .Pulse oximeter 400 is in one embodiment designed to be used in sleep studies. In sleep studies it is often desirable to measure the patient's pulse rate and oxygenation levels while they sleep. Further, sensor devices should be non-invasive and as comfortable as possible so as not to disrupt the participant's sleep. However, in most sleep studies it is extremely difficult to maintain a sensor device in place through all sleep cycles. Tossing and turning of the study participant during sleep often results in the sensor device being pulled off or displaced. -
Sensor 400 is provided with a wrappingtail 410 as a stabilizing component to reduce the likelihood that the sleep study participant will dislodgesensor 400 while sleeping. In one embodiment, wrappingtail 410 extends from afront portion 412 ofsensor 400. Wrappingtail 410 preferably has a length that is sufficient to permittail 410 to be wrapped a number of times around the finger and wrist of the participant, as illustrated byFIG. 4B . By so wrappingtail 410 around the finger and wrist,sensor 400 provides a stable platform forsensor elements lead 140. In one application, as shown inFIG. 4B , attail 410 is wrapped a full turn around the finger, preferably between the 2nd and 3rd knuckles prior to being wrapped around the wrist. - In some
embodiments frame 131 is provided within wrappingtail 410 to further assist in maintainingsensor 400 in place. In other embodiments, an adhesive or hook-and-loop type fastener upontail 410 may be utilized tosecured sensor 400 in place.Tail 410 may be a different material fromfoldable portion 130. For example,tail 410 may be a flexible fabric strap. While the embodiment ofFIG. 4 has been described in relation to a sleep study participant, it should be appreciated thatsensor 400 may have a variety of other uses. - As shown in
FIG. 4B , a portion of themalleable frame 131 is bent along a longitudinal axis of the appendage and another portion of themalleable frame 131 is bent along an axis perpendicular to the longitudinal axis. - Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (82)
1. A sensor device comprising:
a foldable member carrying one or more sensor elements;
a communications link configured to transmit data from said one or more sensor elements; and
a frame engaging said foldable member, together said frame and foldable member adapted to be deformed from an initial shape into a customized form providing said one or more sensor elements in a desired orientation relative to a tissue field, with said frame maintaining said foldable member in said customized form.
2. The sensor device of claim 1 further comprising:
a flexible cover material connected to the foldable member, said flexible cover material covering a skin surface engaging material.
3. The sensor device of claim 1 further comprising:
a stabilization component between a lead of said communications link and said one or more sensors elements.
4. The sensor device of claim 3 wherein the stabilization component comprises:
a first aperture through said foldable member and disposed between said one or more sensor elements and said lead.
5. The sensor device of claim 4 wherein the stabilization component further comprises:
a second aperture through said foldable member and disposed between said first aperture and said one ore more sensor elements; and
a bridge disposed between said first aperture and second aperture.
6. The sensor device of claim 3 wherein the stabilizing component comprises:
an elongated tail.
7. The sensor device of claim 6 wherein the tail is configured to wrap around a finger and forearm of a user.
8. The sensor device of claim 1 wherein said one or more sensor elements further comprises:
a light source; and
a light detector configured to receive light from said light source through said tissue field.
9. The sensor device of claim 1 wherein the foldable member is removable from said one or more sensor elements.
10. The sensor device of claim 1 wherein said communications link is a wired link to a remote site.
11. The sensor device of claim 1 wherein said communications link is a wireless link.
12. The sensor device of claim 1 wherein said foldable member further comprises:
a first material disposed on a bottom portion of the device; and
a second material disposed on a top portion of the device.
13. The sensor device of claim 12 wherein the first material is a compressible material.
14. The sensor device of claim 13 wherein the first material is a polyurethane foam.
15. The sensor device of claim 12 wherein the second material is denser than the first material.
16. The sensor device of claim 12 wherein said frame is disposed between the first material and second material.
17. The sensor device of claim 16 wherein said frame is separable and disposable from said foldable component.
18. The sensor device of claim 1 wherein said frame is of malleable material.
19. The sensor device of claim 1 wherein the foldable member has a plurality of apertures arranged to provide air circulation to said tissue field covered by said foldable component.
20. The sensor device of claim 1 further comprising:
an alignment aperture adapted to be engaged by an appendage tip prior to folding of said foldable member.
21. The sensor device of claim 20 wherein the aperture has a first radius and a second radius, the first radius and the second radius corresponding to radii of said appendage tip.
22. The sensor device of claim 1 wherein the foldable member further comprises:
a curved portion configured to interface with a bottom portion of an appendage and to allow movement of the appendage when the device is folded.
23. The sensor device of claim 22 wherein the curved portion define portions of a pair of winglets configured to fold around sides of the appendage.
24. The sensor device of claim 1 wherein a rear section of the foldable member further comprises a stabilization component.
25. The sensor device of claim 24 wherein the stabilization component comprises a first aperture, wherein an appendage is placed through the first aperture prior to folding the device.
26. The sensor device of claim 25 wherein the stabilization component further comprises:
a second aperture proximate to the first aperture;
a bridge disposed between the first and second aperture; and
wherein the appendage is inserted through the second aperture over the bridge and through the first aperture such that the appendage
27. The sensor device of claim 24 wherein the stabilization component comprises a wrapping tail, the wrapping tail having a length sufficient to wrap around a forearm.
28. A sensor device configured to be placed on an appendage of an animal, comprising:
a foldable member carrying one or more sensor elements; and
a pliant frame connected to said foldable member, said frame and foldable member being configured by a deforming force to conform to an appendage, said frame and foldable member positioning said one or more sensor elements proximate to a tissue field of said appendage, and said frame maintaining said foldable member in a deformed orientation upon release of the deforming force.
29. The sensor device of claim 28 wherein the foldable member comprises:
a first material;
a second material; and
wherein the first material and second material overlap such that when folded the first material engages a surface of said tissue field and the second material is generally disposed on an outside of the folded member.
30. The sensor device of claim 29 wherein the first material is a foam-type material.
31. The sensor device of claim 30 wherein the first material is a polyurethane foam.
32. The sensor device of claim 29 wherein the second material is comprised of a foam like material, the second material being denser than the first material.
33. The sensor device of claim 32 wherein the second material defines a protective layer for the sensor device.
34. The sensor device of claim 28 wherein said foldable member is separable from said frame.
35. The sensor device of claim 28 further comprising:
a communications link providing communication between said one or more sensors and a remote device.
36. The sensor device of claim 35 wherein the communications link includes a wired component.
37. The sensor device of claim 35 wherein the communication link includes a wireless component.
38. The sensor device of claim 28 wherein the foldable member further comprises:
an alignment aperture adapted to be engaged by a tip of said appendage prior to folding of said foldable member.
39. The sensor device of claim 38 wherein the aperture has a first radius and a second radius, the first radius and the second radius corresponding to radii of said appendage tip.
40. The sensor device of claim 28 wherein the foldable member further comprises:
a curved portion, said curved portion configured to interface with a bottom portion of the appendage and to allow movement of the appendage when the device is folded.
41. The sensor device of claim 40 wherein the curved portion comprises portions of two winglets, the winglets configured to fold around sides of the appendage.
42. The sensor device of claim 28 wherein a rear section of the foldable member further comprises a stabilization component.
43. The sensor device of claim 42 wherein the stabilization component comprises a first aperture, wherein the appendage is placed through the first aperture prior to folding the device.
44. The sensor device of claim 43 wherein the stabilization component further comprises:
a second aperture proximate to the first aperture;
a bridge disposed between the first and second aperture; and
wherein the appendage is inserted through the second aperture over the bridge and through the first aperture during application of said sensor device.
45. The sensor device of claim 42 wherein the stabilization component comprises a wrapping tail, the wrapping tail having a length sufficient to wrap around a forearm.
46. The sensor device of claim 28 wherein the sensor comprises:
a pair of light emitting diodes disposed on the foldable member;
a photodiode disposed on the foldable member; and
wherein the LED and the photodiode are arranged on foldable member such that when folded the LED and photodiode are on opposite sides of the appendage.
47. A method of attaching a foldable sensor device to an appendage comprising:
placing the sensor device at a portion of the appendage;
folding the sensor device over said appendage portion into a folded orientation; and
biasing the sensor device in the folded orientation so as to retain said appendage portion within said folded sensor device.
48. The method of claim 47 further comprising:
placing a portion of the appendage into an alignment aperture, said aperture being sized to correspond with a tip of the appendage.
49. The method of claim 48 further comprising:
providing stabilization of the sensor device using portions of said appendage for stabilization.
50. The method of claim 49 wherein providing stabilization comprises:
inserting the appendage through a first aperture in the sensor device.
51. The method of claim 50 further comprising:
inserting the appendage through a second aperture in the sensor device; and
placing the appendage over a bridge located between the first and second apertures.
52. The method of claim 47 wherein providing stabilization comprises:
wrapping a portion of the sensor device around the appendage.
53. The method of claim 52 wherein wrapping the portion of the sensor device, further comprises:
wrapping the portion around a forearm of a patient.
54. The method of claim 47 wherein said folding comprises:
bending a rigid deformable frame disposed in a portion of said sensor device.
55. The method of claim 54 wherein the frame is initially provided in a flat form prior to being folded before use.
56. A method of attaching a foldable sensor device to an appendage comprising:
bending a deformable sensor device over an appendage portion so as position optical sensor elements on either side of the appendage; and
biasing said sensor device in a bent position so as to retain said appendage portion within said sensor device.
57. The method of claim 56 further comprising:
placing a tip portion of the appendage into an alignment aperture of said sensor device.
58. The method of claim 56 further comprising:
isolating said optical sensor elements with a stabilization component, said stabilization component transferring an external force to the appendage away from the optical sensor elements.
59. The method of claim 58 wherein said isolating comprises:
inserting the appendage through a first aperture in the sensor device.
60. The method of claim 59 further comprising:
inserting the appendage through a second aperture in the sensor device; and
placing the appendage over a bridge located between the first and second apertures.
61. The method of claim 58 wherein said isolating comprises:
wrapping a tail portion of the sensor device around the appendage.
62. The method of claim 61 wherein wrapping the portion of the sensor device, further comprises:
wrapping the portion around a forearm of a patient.
63. The method of claim 56 wherein the frame is initially provided in a flat form prior to being folded before use.
64. The method of claim 62 wherein said biasing is performed by a malleable frame engaging foldable material in contact with said apendage.
65. A method of adapting an oximeter sensor to an appendage comprising:
bending a deformable sensor device over an appendage into a customized form so as conform portions of said sensor device to said appendage and position elements of a light sensor at a tissue field of the appendage; and
maintaining said sensor device in said customized form with a biasing element so as to retain said sensor device upon said appendage and said light sensor elements at the tissue field.
66. The method of claim 65 further comprising:
isolating said optical sensor elements with a stabilization component, said stabilization component transferring an external force to the appendage away from the optical sensor elements.
67. The method of claim 66 wherein said isolating comprises:
inserting the appendage through a first aperture in the sensor device.
68. The method of claim 67 further comprising:
inserting the appendage through a second aperture in the sensor device; and
placing the appendage over a bridge located between the first and second apertures.
69. The method of claim 65 wherein said isolation comprises:
wrapping a tail portion of the sensor device around the appendage.
70. The method of claim 65 wherein said biasing element is a deformable frame.
71. The method of claim 70 wherein said frame is enclosed within at least a portion of the sensor device.
72. An assembly comprising:
a plurality of preformed sensor devices each having a deformable body, optical sensor components and a communications link, each sensor device being customized prior to use by deformation of said body from a preformed shape into a form fit to a unique patient morphology, and each sensor having a frame for maintaining said sensor in said form during a sensor process.
73. The assembly of claim 72 wherein the sensors are provided in a preformed shape which is generally flat.
74. The assembly of claim 72 wherein the patient morphology is defined upon an appendage of the patient.
75. A method of customizing a sensor device to a unique user comprising:
applying a bending force to a preformed sensor device having a deformable body, optical sensor components and a communications link, said bending force causing the body to deform into a shape unique to an appendage of said user; and
biasing said deformable body in said unique shape upon removal of said bending force, said biasing relying at least in part on a frame deformed by said bending force.
76. The method of claim 75 wherein said applying a bending force results in a portion of said body being bent over a finger tip with winglet portions being bent around the finger tip.
77. A method of manufacturing a sensor device comprising:
attaching optical sensor elements to a flexible substrate, said substrate sized to conform to at least a portion of a patient appendage;
coupling said optical sensor elements to a communications link extending away from said substrate; and
connecting a deformable frame to the substrate, said frame being sized to maintain the substrate to said portion of the patient appendage.
78. The method of claim 77 wherein said connecting includes encompassing said frame within said substrate.
79. The method of claim 77 wherein said substrate includes multiple plies of material.
80. A sensor device comprising:
a foldable member carrying one or more sensor elements; and
deformable means connected to said foldable member, said deformable means and foldable member being reconfigured by a deforming force to conform to an appendage, said deformable means and foldable member positioning said one or more sensor elements proximate to a tissue field of said appendage, and said deformable means providing forces tending to maintain the foldable member in a deformed orientation upon release of said deforming force.
81. The sensor device of claim 80 wherein said deformable means includes a malleable frame adapted to be bent around a tip of the appendage.
82. The sensor device of claim 81 wherein a portion of the malleable frame is bent along a longitudinal axis of the appendage and another portion of the malleable frame is bent along an axis perpendicular to the longitudinal axis.
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JP2010519008A (en) | 2010-06-03 |
WO2008106528A2 (en) | 2008-09-04 |
EP2129287A4 (en) | 2013-12-04 |
US20080208023A1 (en) | 2008-08-28 |
EP2129287A2 (en) | 2009-12-09 |
WO2008106528A3 (en) | 2008-12-04 |
US8326392B2 (en) | 2012-12-04 |
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Legal Events
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