WO2000022408A8 - Method, apparatus and system for removing motion artifacts from measurements of bodily parameters - Google Patents

Method, apparatus and system for removing motion artifacts from measurements of bodily parameters

Info

Publication number
WO2000022408A8
WO2000022408A8 PCT/US1999/023803 US9923803W WO0022408A8 WO 2000022408 A8 WO2000022408 A8 WO 2000022408A8 US 9923803 W US9923803 W US 9923803W WO 0022408 A8 WO0022408 A8 WO 0022408A8
Authority
WO
WIPO (PCT)
Prior art keywords
bodily
segment
motion artifacts
data
parameter
Prior art date
Application number
PCT/US1999/023803
Other languages
French (fr)
Other versions
WO2000022408A9 (en
WO2000022408A2 (en
WO2000022408A3 (en
Inventor
Jesus D Martin
John R Delfavero
August J Allo Jr
Reuben W Edgar Jr
Michael B Jaffe
Original Assignee
Ntc Technology Inc
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 Ntc Technology Inc filed Critical Ntc Technology Inc
Priority to DE69939325T priority Critical patent/DE69939325D1/en
Priority to EP99970465A priority patent/EP1121051B1/en
Publication of WO2000022408A2 publication Critical patent/WO2000022408A2/en
Publication of WO2000022408A3 publication Critical patent/WO2000022408A3/en
Publication of WO2000022408A8 publication Critical patent/WO2000022408A8/en
Publication of WO2000022408A9 publication Critical patent/WO2000022408A9/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
    • A61B5/145—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
    • A61B5/14551—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 for measuring blood gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts

Abstract

This invention is a method for removing motion artifacts from devices for sensing bodily parameters, an apparatus, and system for effecting same. The method includes analyzing segments of measured data (100) representing bodily parameters, and possibly noise from motion artifacts. Each segment of measured data may correspond to a single light signal transmitted, and detected after transmission or reflection through bodily tissue. Each data segment is frequency analyzed (110) to determine dominant frequency components. The frequency component which represents at least on bodily parameter of interest (120) is selected for further processing. The segment of data is subdivided into subsegments, each subsegment representing one heartbeat. The subsegments are used to calculate a modified average pulse as a candidate output pulse (130). The candidate output pulse is analyzed to determine whether it is a valid bodily parameter and, if yes, it is output for use in calculating the at least one bodily parameter of interest without any substantial noise degradation. The above method may be applied to red, and infrared pulse oximetry signals prior to calculating pulsatile blood oxygen concentration.
PCT/US1999/023803 1998-10-15 1999-10-13 Method, apparatus and system for removing motion artifacts from measurements of bodily parameters WO2000022408A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE69939325T DE69939325D1 (en) 1998-10-15 1999-10-13 METHOD, DEVICE AND SYSTEM FOR ELIMINATING MOTION FACTORS IN MEASUREMENTS OF BODY PARAMETERS
EP99970465A EP1121051B1 (en) 1998-10-15 1999-10-13 Method, apparatus and system for removing motion artifacts from measurements of bodily parameters

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10442298P 1998-10-15 1998-10-15
US60/104,422 1998-10-15
US09/410,991 US6393311B1 (en) 1998-10-15 1999-10-01 Method, apparatus and system for removing motion artifacts from measurements of bodily parameters
US09/410,991 1999-10-01

Publications (4)

Publication Number Publication Date
WO2000022408A2 WO2000022408A2 (en) 2000-04-20
WO2000022408A3 WO2000022408A3 (en) 2000-07-13
WO2000022408A8 true WO2000022408A8 (en) 2000-08-17
WO2000022408A9 WO2000022408A9 (en) 2000-10-05

Family

ID=26801523

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/023803 WO2000022408A2 (en) 1998-10-15 1999-10-13 Method, apparatus and system for removing motion artifacts from measurements of bodily parameters

Country Status (5)

Country Link
US (1) US6393311B1 (en)
EP (1) EP1121051B1 (en)
AT (1) ATE404109T1 (en)
DE (1) DE69939325D1 (en)
WO (1) WO2000022408A2 (en)

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Publication number Publication date
US6393311B1 (en) 2002-05-21
DE69939325D1 (en) 2008-09-25
EP1121051A4 (en) 2003-07-02
EP1121051A2 (en) 2001-08-08
WO2000022408A9 (en) 2000-10-05
WO2000022408A2 (en) 2000-04-20
ATE404109T1 (en) 2008-08-15
WO2000022408A3 (en) 2000-07-13
EP1121051B1 (en) 2008-08-13

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