WO2005074550A3 - Non-invasive blood component measurement system - Google Patents

Non-invasive blood component measurement system Download PDF

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Publication number
WO2005074550A3
WO2005074550A3 PCT/US2005/002754 US2005002754W WO2005074550A3 WO 2005074550 A3 WO2005074550 A3 WO 2005074550A3 US 2005002754 W US2005002754 W US 2005002754W WO 2005074550 A3 WO2005074550 A3 WO 2005074550A3
Authority
WO
WIPO (PCT)
Prior art keywords
blood
diffuse reflection
pulsate
analytes
spectroscopy
Prior art date
Application number
PCT/US2005/002754
Other languages
French (fr)
Other versions
WO2005074550A2 (en
Inventor
Ralf T Faber
Erik J Schwendeman
Guangming Wang
Original Assignee
3Wave Optics Llc
Ralf T Faber
Erik J Schwendeman
Guangming Wang
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 3Wave Optics Llc, Ralf T Faber, Erik J Schwendeman, Guangming Wang filed Critical 3Wave Optics Llc
Publication of WO2005074550A2 publication Critical patent/WO2005074550A2/en
Publication of WO2005074550A3 publication Critical patent/WO2005074550A3/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
    • 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
    • A61B5/145—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

Abstract

Non- invasive, optical apparatus and methods for the direct measurement of hemoglobin derivatives and other analyte concentration levels in blood using diffuse reflection and transmission spectroscopy in the wavelength region 400 - 1350 nm which includes the transparent tissue window from approximately 610 to 1311 nanometers and, using diffuse reflection spectroscopy, the mid-infrared region from 4.3 - 12 microns in wavelength. Large area light collection techniques are utilized to provide a much larger pulsate signal than can be obtain with current sensor technology. Sensors used in separate or simultaneous precision measurements of both diffuse reflection and transmission, either separately or simultaneously, from pulsate, blood-perfused tissue for the subsequent determination of the blood analytes concentrations such as arterial blood oxygen saturation (Sa02), carboxyhemoglobin (COHb), oxyhemoglobin (OHb), deoxyhemoglobin (dOHb), methemoglobin (metHb), water (H20), hematocrit (HCT), glucose, cholesterol and proteins such as albumin and other analytes components.
PCT/US2005/002754 2004-01-30 2005-01-31 Non-invasive blood component measurement system WO2005074550A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54066304P 2004-01-30 2004-01-30
US60/540,663 2004-01-30

Publications (2)

Publication Number Publication Date
WO2005074550A2 WO2005074550A2 (en) 2005-08-18
WO2005074550A3 true WO2005074550A3 (en) 2008-10-30

Family

ID=34837412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/002754 WO2005074550A2 (en) 2004-01-30 2005-01-31 Non-invasive blood component measurement system

Country Status (2)

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US (1) US20050267346A1 (en)
WO (1) WO2005074550A2 (en)

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