AU2001294116A1 - Method and apparatus for determining the cerebral state of patient with fast response - Google Patents

Method and apparatus for determining the cerebral state of patient with fast response

Info

Publication number
AU2001294116A1
AU2001294116A1 AU2001294116A AU9411601A AU2001294116A1 AU 2001294116 A1 AU2001294116 A1 AU 2001294116A1 AU 2001294116 A AU2001294116 A AU 2001294116A AU 9411601 A AU9411601 A AU 9411601A AU 2001294116 A1 AU2001294116 A1 AU 2001294116A1
Authority
AU
Australia
Prior art keywords
patient
entropy
indication
cerebral state
signal data
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.)
Abandoned
Application number
AU2001294116A
Inventor
Borje T. Rantala
Hanna E. Vierto-Oja
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.)
Instrumentarium Oyj
Original Assignee
Instrumentarium Oyj
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 Instrumentarium Oyj filed Critical Instrumentarium Oyj
Publication of AU2001294116A1 publication Critical patent/AU2001294116A1/en
Abandoned 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
    • A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
    • 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
    • A61B5/369—Electroencephalography [EEG]
    • 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
    • A61B5/389—Electromyography [EMG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4821—Determining level or depth of anaesthesia
    • 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
    • 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
    • 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
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A61B5/7257—Details of waveform analysis characterised by using transforms using Fourier transforms
    • 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
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A61B5/726—Details of waveform analysis characterised by using transforms using Wavelet transforms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
    • G06F2218/08—Feature extraction

Abstract

A method and apparatus for ascertaining the cerebral state of a patient. The method/apparatus may find use in ascertaining the depth of anesthesia of the patient. In one embodiment, the entropy of the patient's EEG signal data is determined as an indication of the cerebral state. A frequency domain power spectrum quantity is obtained from the patient's EMG signal data. The latter quantity can be updated more frequently than the EEG entropy due to its higher frequency. The EEG entropy indication and the EMG power spectrum indication can be combined into a composite indicator that provides an immediate indication of changes in the cerebral state of the patient. In another embodiment, the frequency range over which the entropy of the biopotential signal from the patient is determined is broadened to encompass both EEG signal data and EMG signal data and the entropy so determined used as an indication of the patient's cerebral state.
AU2001294116A 2000-10-16 2001-10-12 Method and apparatus for determining the cerebral state of patient with fast response Abandoned AU2001294116A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09688891 2000-10-16
US09/688,891 US6731975B1 (en) 2000-10-16 2000-10-16 Method and apparatus for determining the cerebral state of a patient with fast response
PCT/IB2001/001932 WO2002032305A1 (en) 2000-10-16 2001-10-12 Method and apparatus for determining the cerebral state of a patient with fast response

Publications (1)

Publication Number Publication Date
AU2001294116A1 true AU2001294116A1 (en) 2002-04-29

Family

ID=24766195

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001294116A Abandoned AU2001294116A1 (en) 2000-10-16 2001-10-12 Method and apparatus for determining the cerebral state of patient with fast response

Country Status (8)

Country Link
US (3) US6731975B1 (en)
EP (1) EP1328193B1 (en)
JP (1) JP4030869B2 (en)
AT (1) ATE313295T1 (en)
AU (1) AU2001294116A1 (en)
CA (1) CA2396545A1 (en)
DE (1) DE60116132T2 (en)
WO (1) WO2002032305A1 (en)

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Also Published As

Publication number Publication date
US20030167019A1 (en) 2003-09-04
EP1328193B1 (en) 2005-12-21
EP1328193A1 (en) 2003-07-23
DE60116132T2 (en) 2006-07-13
WO2002032305A1 (en) 2002-04-25
US20040082876A1 (en) 2004-04-29
US6731975B1 (en) 2004-05-04
JP4030869B2 (en) 2008-01-09
US7228169B2 (en) 2007-06-05
DE60116132D1 (en) 2006-01-26
CA2396545A1 (en) 2002-04-25
ATE313295T1 (en) 2006-01-15
JP2004511286A (en) 2004-04-15

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