Method and device for evaluating an EEG carried out in the context of anaesthesia or intensive care
First Claim
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1. A method for evaluating an EEG of a person under anaesthesia or in intensive care comprising:
- (a) measuring EEG curves of the person through a plurality of stages;
(b) determining time or frequency domain parameters from the measured EEG curves;
(c) inserting the determined parameters into multivariate classification functions;
(d) automatically allocating said functions into the stages of the EEG;
(e) determining limit values of the parameters, including EEG signal strength in relation to a base line and correcting the multivariate classification functions using the limit values;
(f) determining movement artifacts caused by movements during the EEG; and
(g) suppressing allocation into stages based on an evaluation of the movement artifacts.
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Abstract
A method of evaluating an EEG carried out in the context of anaesthesia or intensive care is disclosed. To this end, parameters from the time and/or frequency domains are determined from the EEG curves, the parameters determined are used in multivariate classification functions, and on this basis the EEG carried out in the context of anaesthesia or intensive care is automatically divided into stages.
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12 Claims
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1. A method for evaluating an EEG of a person under anaesthesia or in intensive care comprising:
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(a) measuring EEG curves of the person through a plurality of stages; (b) determining time or frequency domain parameters from the measured EEG curves; (c) inserting the determined parameters into multivariate classification functions; (d) automatically allocating said functions into the stages of the EEG; (e) determining limit values of the parameters, including EEG signal strength in relation to a base line and correcting the multivariate classification functions using the limit values; (f) determining movement artifacts caused by movements during the EEG; and (g) suppressing allocation into stages based on an evaluation of the movement artifacts. - View Dependent Claims (2, 3, 4, 5)
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6. A device for evaluating an anaesthesia EEG or an intensive-care EEG of a person comprising
(a) a measuring device for measuring EEG curves of the person through a plurality of stages; -
(b) a movement sensor having at least one sensor element adapted to be attached to or coupled with the head of the person for determining movement artifacts; and (c) a computer coupled to the measuring device and the movement sensor, said computer comprising; (i) means for determining time or frequency domain parameters from the measured EEG curves; (ii) means for inserting the determined parameters into multivariate classification functions; (iii) means for automatically allocating said functions into the stages of the EEG; (iv) means for determining limit values of the parameters, including EEG signal strength in relation to a base line, and for undertaking a correction of the multivariate classification function using the limit values; and (v) means for evaluating movement artifacts determined by the movement sensor in order to suppress the allocation into stages of the EEG. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification