CA2093922A1 - A device for measurement of electrical impedance of organic and biological materials - Google Patents

A device for measurement of electrical impedance of organic and biological materials

Info

Publication number
CA2093922A1
CA2093922A1 CA002093922A CA2093922A CA2093922A1 CA 2093922 A1 CA2093922 A1 CA 2093922A1 CA 002093922 A CA002093922 A CA 002093922A CA 2093922 A CA2093922 A CA 2093922A CA 2093922 A1 CA2093922 A1 CA 2093922A1
Authority
CA
Canada
Prior art keywords
under test
organic
biological materials
electrical impedance
probe
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002093922A
Other languages
French (fr)
Other versions
CA2093922C (en
Inventor
Stig Ollmar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centrum for Dentalteknik och Biomaterial
Original Assignee
Stig Ollmar
Centrum For Dentalteknik Och Biomaterial
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 Stig Ollmar, Centrum For Dentalteknik Och Biomaterial filed Critical Stig Ollmar
Publication of CA2093922A1 publication Critical patent/CA2093922A1/en
Application granted granted Critical
Publication of CA2093922C publication Critical patent/CA2093922C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—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
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers

Abstract

A device far depth-selective, non-invasive, local measurement of electrical impedance of organic and biological materials such as tis-sues from vegetable or animal origin comprising a probe (Fig. l-3; 9a, 9b) with a number of electrodes (A, B, C) driven from an electronic control unit (F) in such a way that the electric current path defining the actual tissue under test is dependent upon a control signal. The probe is pressed toward the surface of the body part under test and by varying the control signal, it is possible to select the region under test within limits determined by the shapes, sizes and distances of the elec-erodes and the properties of the tissue under test. By means of combin-ing results obtained with different control signals, it is possible to compute local impedance profiles.
CA002093922A 1990-10-18 1991-10-18 A device for measurement of electrical impedance of organic and biological materials Expired - Lifetime CA2093922C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9003336A SE466987B (en) 1990-10-18 1990-10-18 DEVICE FOR DEEP-SELECTIVE NON-INVASIVE, LOCAL SEATING OF ELECTRICAL IMPEDANCE IN ORGANIC AND BIOLOGICAL MATERIALS AND PROBE FOR SEATING ELECTRICAL IMPEDANCE
SE9003336-6 1990-10-18
PCT/SE1991/000703 WO1992006634A1 (en) 1990-10-18 1991-10-18 A device for measurement of electrical impedance of organic and biological materials

Publications (2)

Publication Number Publication Date
CA2093922A1 true CA2093922A1 (en) 1992-04-19
CA2093922C CA2093922C (en) 2001-07-31

Family

ID=20380684

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002093922A Expired - Lifetime CA2093922C (en) 1990-10-18 1991-10-18 A device for measurement of electrical impedance of organic and biological materials

Country Status (15)

Country Link
US (1) US5353802A (en)
EP (1) EP0553187B1 (en)
JP (1) JP3320413B2 (en)
KR (1) KR100201178B1 (en)
AT (1) ATE167794T1 (en)
AU (1) AU659111B2 (en)
CA (1) CA2093922C (en)
DE (1) DE69129698T2 (en)
DK (1) DK0553187T3 (en)
ES (1) ES2120419T3 (en)
FI (1) FI110304B (en)
HU (1) HU216496B (en)
NO (1) NO307863B1 (en)
SE (1) SE466987B (en)
WO (1) WO1992006634A1 (en)

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Also Published As

Publication number Publication date
FI110304B (en) 2002-12-31
CA2093922C (en) 2001-07-31
HU9301109D0 (en) 1993-08-30
SE9003336A (en) 1992-04-19
DE69129698T2 (en) 1999-03-11
NO931415L (en) 1993-05-13
NO307863B1 (en) 2000-06-13
KR100201178B1 (en) 1999-06-15
AU8849991A (en) 1992-05-20
US5353802A (en) 1994-10-11
EP0553187A1 (en) 1993-08-04
JP3320413B2 (en) 2002-09-03
ES2120419T3 (en) 1998-11-01
WO1992006634A1 (en) 1992-04-30
SE466987B (en) 1992-05-11
EP0553187B1 (en) 1998-07-01
DE69129698D1 (en) 1998-08-06
AU659111B2 (en) 1995-05-11
FI931730A (en) 1993-04-16
HUT66173A (en) 1994-09-28
DK0553187T3 (en) 1999-06-28
HU216496B (en) 1999-07-28
FI931730A0 (en) 1993-04-16
SE9003336D0 (en) 1990-10-18
NO931415D0 (en) 1993-04-16
ATE167794T1 (en) 1998-07-15
JPH06502323A (en) 1994-03-17

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