WO2004047627A3 - Eliminating interface artifact errors in bioimpedance measurements - Google Patents

Eliminating interface artifact errors in bioimpedance measurements Download PDF

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Publication number
WO2004047627A3
WO2004047627A3 PCT/CA2003/001825 CA0301825W WO2004047627A3 WO 2004047627 A3 WO2004047627 A3 WO 2004047627A3 CA 0301825 W CA0301825 W CA 0301825W WO 2004047627 A3 WO2004047627 A3 WO 2004047627A3
Authority
WO
WIPO (PCT)
Prior art keywords
bioimpedance measurements
body part
impedances
interface artifact
eliminating interface
Prior art date
Application number
PCT/CA2003/001825
Other languages
French (fr)
Other versions
WO2004047627A2 (en
Inventor
Kenneth Carless Smith
Joel Steven Ironstone
Original Assignee
Z Tech Canada Inc
Kenneth Carless Smith
Joel Steven Ironstone
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 Z Tech Canada Inc, Kenneth Carless Smith, Joel Steven Ironstone filed Critical Z Tech Canada Inc
Priority to AU2003286047A priority Critical patent/AU2003286047A1/en
Priority to EP03776721A priority patent/EP1571981A2/en
Publication of WO2004047627A2 publication Critical patent/WO2004047627A2/en
Publication of WO2004047627A3 publication Critical patent/WO2004047627A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/43—Detecting, measuring or recording for evaluating the reproductive systems
    • A61B5/4306—Detecting, measuring or recording for evaluating the reproductive systems for evaluating the female reproductive systems, e.g. gynaecological evaluations
    • A61B5/4312—Breast evaluation or disorder diagnosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/0041—Detection of breast cancer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0531—Measuring skin impedance
    • 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
    • A61B5/6843—Monitoring or controlling sensor contact pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00026—Conductivity or impedance, e.g. of tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/0016—Energy applicators arranged in a two- or three dimensional array
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
    • A61B2090/065—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension for measuring contact or contact pressure
    • 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
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/276—Protection against electrode failure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A61B5/282—Holders for multiple electrodes

Abstract

A system for diagnosing the possibility of disease in one of a first body part and a second substantially similar body part by impedance measurements is described. The system includes an impedance module for calculating impedances of corresponding segments of the first and second body parts from current and voltage signals. The measured impedances are corrected to account for the effect of stray impedances arising from non-body part sources.
PCT/CA2003/001825 2002-11-27 2003-11-27 Eliminating interface artifact errors in bioimpedance measurements WO2004047627A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003286047A AU2003286047A1 (en) 2002-11-27 2003-11-27 Eliminating interface artifact errors in bioimpedance measurements
EP03776721A EP1571981A2 (en) 2002-11-27 2003-11-27 Eliminating interface artifact errors in bioimpedance measurements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42931602P 2002-11-27 2002-11-27
US60/429,316 2002-11-27

Publications (2)

Publication Number Publication Date
WO2004047627A2 WO2004047627A2 (en) 2004-06-10
WO2004047627A3 true WO2004047627A3 (en) 2004-09-10

Family

ID=32393539

Family Applications (4)

Application Number Title Priority Date Filing Date
PCT/CA2003/001825 WO2004047627A2 (en) 2002-11-27 2003-11-27 Eliminating interface artifact errors in bioimpedance measurements
PCT/CA2003/001827 WO2004047636A1 (en) 2002-11-27 2003-11-27 Apparatus for determining adequacy of electrode-to-skin contact and electrode quality for bioelectrical measurements
PCT/CA2003/001826 WO2004047643A1 (en) 2002-11-27 2003-11-27 Bioimpedance measurement using controller-switched current injection and multiplexer selected electrode connection
PCT/CA2003/001824 WO2004048983A1 (en) 2002-11-27 2003-11-27 Improved apparatus and method for performing impedance measurements

Family Applications After (3)

Application Number Title Priority Date Filing Date
PCT/CA2003/001827 WO2004047636A1 (en) 2002-11-27 2003-11-27 Apparatus for determining adequacy of electrode-to-skin contact and electrode quality for bioelectrical measurements
PCT/CA2003/001826 WO2004047643A1 (en) 2002-11-27 2003-11-27 Bioimpedance measurement using controller-switched current injection and multiplexer selected electrode connection
PCT/CA2003/001824 WO2004048983A1 (en) 2002-11-27 2003-11-27 Improved apparatus and method for performing impedance measurements

Country Status (5)

Country Link
US (4) US20040158167A1 (en)
EP (4) EP1571982A1 (en)
AU (4) AU2003286046A1 (en)
CA (4) CA2450971A1 (en)
WO (4) WO2004047627A2 (en)

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