WO2006020408A3 - Method and apparatus for monitoring glucose levels in a biological tissue - Google Patents

Method and apparatus for monitoring glucose levels in a biological tissue Download PDF

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Publication number
WO2006020408A3
WO2006020408A3 PCT/US2005/026744 US2005026744W WO2006020408A3 WO 2006020408 A3 WO2006020408 A3 WO 2006020408A3 US 2005026744 W US2005026744 W US 2005026744W WO 2006020408 A3 WO2006020408 A3 WO 2006020408A3
Authority
WO
WIPO (PCT)
Prior art keywords
tissue
glucose
blood
light
reflected light
Prior art date
Application number
PCT/US2005/026744
Other languages
French (fr)
Other versions
WO2006020408A2 (en
Inventor
Matthew J Schurman
Walter J Shakespeare
Original Assignee
Glucolight Corp
Matthew J Schurman
Walter J Shakespeare
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 Glucolight Corp, Matthew J Schurman, Walter J Shakespeare filed Critical Glucolight Corp
Priority to AU2005274170A priority Critical patent/AU2005274170A1/en
Priority to EP05767654A priority patent/EP1788927A4/en
Priority to JP2007525643A priority patent/JP2008509728A/en
Priority to CA002576243A priority patent/CA2576243A1/en
Publication of WO2006020408A2 publication Critical patent/WO2006020408A2/en
Publication of WO2006020408A3 publication Critical patent/WO2006020408A3/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
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0062—Arrangements for scanning
    • A61B5/0066—Optical coherence imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0062—Arrangements for scanning
    • A61B5/0064—Body surface scanning
    • 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
    • A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
    • A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis

Abstract

In accordance with the invention, a low coherence interferometer is used to non-invasively monitor the concentration of glucose in blood by shining a light over a surface area of human or animal tissue, continuously scanning the light over a two dimensional area of the surface, collecting the reflected light from within the tissue and constructively interfering this reflected light with light reflected along a reference path to scan the tissue in depth. Since the reflection spectrum is sensitive to glucose concentration at particular wavelengths, measurement and analysis of the reflected light provides a measure of the level of glucose in the blood. The measurement of glucose is taken from multiple depths within blood-profused tissue, and sensitivity is preferably enhanced by the use of multiple wavelengths. Noise or speckle associated with this technique is minimized by continuously scanning the illuminated tissue in area and depth.
PCT/US2005/026744 2004-08-11 2005-07-27 Method and apparatus for monitoring glucose levels in a biological tissue WO2006020408A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2005274170A AU2005274170A1 (en) 2004-08-11 2005-07-27 Method and apparatus for monitoring glucose levels in a biological tissue
EP05767654A EP1788927A4 (en) 2004-08-11 2005-07-27 Method and apparatus for monitoring glucose levels in a biological tissue
JP2007525643A JP2008509728A (en) 2004-08-11 2005-07-27 Method and apparatus for monitoring blood glucose level in living tissue
CA002576243A CA2576243A1 (en) 2004-08-11 2005-07-27 Method and apparatus for monitoring glucose levels in a biological tissue

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/916,236 US7254429B2 (en) 2004-08-11 2004-08-11 Method and apparatus for monitoring glucose levels in a biological tissue
US10/916,236 2004-08-11

Publications (2)

Publication Number Publication Date
WO2006020408A2 WO2006020408A2 (en) 2006-02-23
WO2006020408A3 true WO2006020408A3 (en) 2007-02-22

Family

ID=35908027

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/026744 WO2006020408A2 (en) 2004-08-11 2005-07-27 Method and apparatus for monitoring glucose levels in a biological tissue

Country Status (7)

Country Link
US (3) US7254429B2 (en)
EP (1) EP1788927A4 (en)
JP (1) JP2008509728A (en)
CN (1) CN101043844A (en)
AU (1) AU2005274170A1 (en)
CA (1) CA2576243A1 (en)
WO (1) WO2006020408A2 (en)

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WO2006020408A2 (en) 2006-02-23
US8204566B2 (en) 2012-06-19
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AU2005274170A2 (en) 2006-02-23
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US20080021293A1 (en) 2008-01-24
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US20060063988A1 (en) 2006-03-23

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