CA2158256A1 - Oximeter with motion detection for alarm modification - Google Patents

Oximeter with motion detection for alarm modification

Info

Publication number
CA2158256A1
CA2158256A1 CA002158256A CA2158256A CA2158256A1 CA 2158256 A1 CA2158256 A1 CA 2158256A1 CA 002158256 A CA002158256 A CA 002158256A CA 2158256 A CA2158256 A CA 2158256A CA 2158256 A1 CA2158256 A1 CA 2158256A1
Authority
CA
Canada
Prior art keywords
motion
pulse
oximeter
alarm
motion detection
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
CA002158256A
Other languages
French (fr)
Other versions
CA2158256C (en
Inventor
David B. Swedlow
Robert S. Potratz
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.)
Nellcor Puritan Bennett LLC
Original Assignee
David B. Swedlow
Robert S. Potratz
Nellcor Incorporated
Nellcor Puritan Bennett Incorporated
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 David B. Swedlow, Robert S. Potratz, Nellcor Incorporated, Nellcor Puritan Bennett Incorporated filed Critical David B. Swedlow
Publication of CA2158256A1 publication Critical patent/CA2158256A1/en
Application granted granted Critical
Publication of CA2158256C publication Critical patent/CA2158256C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A61B5/145—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
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1104—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb induced by stimuli or drugs
    • 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
    • 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
    • A61B5/721—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/74—Details of notification to user or communication with user or patient ; user input means
    • A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
    • 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
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6825—Hand
    • A61B5/6826—Finger
    • 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
    • A61B5/7235—Details of waveform analysis
    • A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives

Abstract

A pulse oximeter which modifies the alarm condition when motion is detected.
Basically, if the lack of a pulse is determined to be as a result of motion artifact, the generation of an alarm is postponed. In addition, the display indicates that motion is present and that the last reading is questionable due to the presence of motion. The invention also determines if motion artifact is present from the pulse oximeter detector signal itself. The ratio of the positive and negative peaks of the derivative of the pulse signal are compared to a motion/blood pulse threshold.
CA002158256A 1993-03-26 1994-03-21 Oximeter with motion detection for alarm modification Expired - Fee Related CA2158256C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/037,953 1993-03-26
US08/037,953 US5368026A (en) 1993-03-26 1993-03-26 Oximeter with motion detection for alarm modification
PCT/US1994/003025 WO1994022360A1 (en) 1993-03-26 1994-03-21 Oximeter with motion detection for alarm modification

Publications (2)

Publication Number Publication Date
CA2158256A1 true CA2158256A1 (en) 1994-10-13
CA2158256C CA2158256C (en) 2005-08-23

Family

ID=21897255

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002158256A Expired - Fee Related CA2158256C (en) 1993-03-26 1994-03-21 Oximeter with motion detection for alarm modification

Country Status (8)

Country Link
US (2) US5368026A (en)
EP (1) EP0690694B1 (en)
JP (1) JP3571341B2 (en)
AU (1) AU685446B2 (en)
CA (1) CA2158256C (en)
DE (1) DE69420399T2 (en)
ES (1) ES2136192T3 (en)
WO (1) WO1994022360A1 (en)

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US5662106A (en) 1997-09-02
AU685446B2 (en) 1998-01-22
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DE69420399D1 (en) 1999-10-07
CA2158256C (en) 2005-08-23

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