WO2004088275A3 - Implantable biosensor system, apparatus and method - Google Patents

Implantable biosensor system, apparatus and method Download PDF

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Publication number
WO2004088275A3
WO2004088275A3 PCT/US2004/009064 US2004009064W WO2004088275A3 WO 2004088275 A3 WO2004088275 A3 WO 2004088275A3 US 2004009064 W US2004009064 W US 2004009064W WO 2004088275 A3 WO2004088275 A3 WO 2004088275A3
Authority
WO
WIPO (PCT)
Prior art keywords
probe
sensor
assembly
flexibility
implantable biosensor
Prior art date
Application number
PCT/US2004/009064
Other languages
French (fr)
Other versions
WO2004088275A2 (en
Inventor
Robert W Hitchcock
James L Sorenson
Original Assignee
Sorenson Medical Inc
Robert W Hitchcock
James L Sorenson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sorenson Medical Inc, Robert W Hitchcock, James L Sorenson filed Critical Sorenson Medical Inc
Publication of WO2004088275A2 publication Critical patent/WO2004088275A2/en
Publication of WO2004088275A3 publication Critical patent/WO2004088275A3/en

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Classifications

    • 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
    • A61B5/1486—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 enzyme electrodes, e.g. with immobilised oxidase
    • A61B5/14865—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 enzyme electrodes, e.g. with immobilised oxidase invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
    • 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
    • A61B5/14532—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 for measuring glucose, e.g. by tissue impedance measurement
    • 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
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6852—Catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0443—Modular apparatus
    • A61B2560/045—Modular apparatus with a separable interface unit, e.g. for communication

Abstract

An implantable biosensor assembly and system includes an enzymatic sensor probe from which subcutaneous and interstitial glucose levels may be inferred. The assembly may be associated by direct percutaneous convection with electronics, such as for signal amplification, sensor polarization, and data download, manipulation, display, and storage. The biosensor comprises a miniature probe characterized by lateral flexibility and tensile strength and has large electrode surface area for increased sensitivity. Irritation of tissues surrounding the probe is minimized due to ease of flexibility and small cross section of the sensor. Foreign body reaction is diminished due to a microscopically rough porous probe surface.
PCT/US2004/009064 2003-03-26 2004-03-25 Implantable biosensor system, apparatus and method WO2004088275A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/401,224 US6965791B1 (en) 2003-03-26 2003-03-26 Implantable biosensor system, apparatus and method
US10/401,224 2003-03-26

Publications (2)

Publication Number Publication Date
WO2004088275A2 WO2004088275A2 (en) 2004-10-14
WO2004088275A3 true WO2004088275A3 (en) 2005-06-16

Family

ID=33130433

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/009064 WO2004088275A2 (en) 2003-03-26 2004-03-25 Implantable biosensor system, apparatus and method

Country Status (2)

Country Link
US (2) US6965791B1 (en)
WO (1) WO2004088275A2 (en)

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