WO2003022143A3 - Detecting vital signs from impedance cardiograph and electrocardiogram signals - Google Patents

Detecting vital signs from impedance cardiograph and electrocardiogram signals Download PDF

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Publication number
WO2003022143A3
WO2003022143A3 PCT/US2002/028376 US0228376W WO03022143A3 WO 2003022143 A3 WO2003022143 A3 WO 2003022143A3 US 0228376 W US0228376 W US 0228376W WO 03022143 A3 WO03022143 A3 WO 03022143A3
Authority
WO
WIPO (PCT)
Prior art keywords
intervals
points
physiologic
icg
window size
Prior art date
Application number
PCT/US2002/028376
Other languages
French (fr)
Other versions
WO2003022143A2 (en
Inventor
Han Chool Ryoo
Hun H Sun
Original Assignee
Univ Drexel
Han Chool Ryoo
Hun H Sun
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 Univ Drexel, Han Chool Ryoo, Hun H Sun filed Critical Univ Drexel
Priority to AU2002341609A priority Critical patent/AU2002341609A1/en
Publication of WO2003022143A2 publication Critical patent/WO2003022143A2/en
Publication of WO2003022143A3 publication Critical patent/WO2003022143A3/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
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • 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
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A61B5/346—Analysis of electrocardiograms
    • A61B5/349—Detecting specific parameters of the electrocardiograph cycle

Abstract

The present invention involves a method and apparatus to reliably determine physiological points such as 'B', 'C', 'X' and 'O' on impedance cardiograph (ICG) signal. Simple but very accurate algorithm has been invented for processing ICG signals considering the relationship between distances of physiologic points (R-B,R-C,R-X,R-O) and R-R intervals. It is aimed to pick localized physiologic points by controlling window size and location around those points adapted to R-R intervals measured from ECG signals. It is found that the time intervals between R-B and R-C are not correlated to R-R intervals; that is, they almost remain constant regardless of R-R intervals. However the intervals of R-X and R-O showed linear relationship with regard to R-R intervals. By using such new findings, the location and the varying window size around these physiologic points were deterined and the slope changes inside the window were monitored. This simple method avoided sophisticated signal processing techniques but it showed high efficiency and promising results by precisely locating PPs for more than 99 % of the time.
PCT/US2002/028376 2001-09-06 2002-09-06 Detecting vital signs from impedance cardiograph and electrocardiogram signals WO2003022143A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002341609A AU2002341609A1 (en) 2001-09-06 2002-09-06 Detecting vital signs from impedance cardiograph and electrocardiogram signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31767601P 2001-09-06 2001-09-06
US60/317,676 2001-09-06

Publications (2)

Publication Number Publication Date
WO2003022143A2 WO2003022143A2 (en) 2003-03-20
WO2003022143A3 true WO2003022143A3 (en) 2003-12-18

Family

ID=23234775

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/028376 WO2003022143A2 (en) 2001-09-06 2002-09-06 Detecting vital signs from impedance cardiograph and electrocardiogram signals

Country Status (2)

Country Link
AU (1) AU2002341609A1 (en)
WO (1) WO2003022143A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080306559A1 (en) * 2004-07-09 2008-12-11 James Allen Defibrillator with Cardiac Blood Flow Determination
DE102005042923A1 (en) * 2005-09-08 2007-03-22 Biotronik Crm Patent Ag Device for determining cardiac function parameters
NL1032272C2 (en) * 2005-09-15 2007-05-16 Martil Instr B V Method and device for determining the flow in a blood vessel.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443073A (en) * 1991-09-12 1995-08-22 Drexel University System and method of impedance cardiography monitoring
US5505209A (en) * 1994-07-07 1996-04-09 Reining International, Ltd. Impedance cardiograph apparatus and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443073A (en) * 1991-09-12 1995-08-22 Drexel University System and method of impedance cardiography monitoring
US5505209A (en) * 1994-07-07 1996-04-09 Reining International, Ltd. Impedance cardiograph apparatus and method

Also Published As

Publication number Publication date
AU2002341609A1 (en) 2003-03-24
WO2003022143A2 (en) 2003-03-20

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