Methods and apparatus for monitoring consciousness
First Claim
1. A method for acquiring, characterising and classifying biosignals from a living being for determining the state of consciousness of said being comprising:
- acquiring at least one continuous biosignal;
stimulating an evoked potential response signal in said being;
deriving at least one evoked potential response signal from said at least continuous biosignal using a processor;
deriving a first index of consciousness from said continuous biosignal;
deriving a second index of consciousness from said evoked potential response signal; and
classifying said indices as being representative of entering or leaving consciousness according to a weighting process.
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Accused Products
Abstract
The systems of the present invention provide improved accuracy in monitoring, analysing, detecting, predicting and/or providing alerts and alarms associated with depth of anaesthesia, depth of consciousness, hypnotic state, sedation depth, fatigue or vigilance of a subject, with as few as 3 surface electrodes. The systems incorporate real-time phase, amplitude and frequency analysis of a subject'"'"'s electro-encephalogram. The systems weight outputs of various types of analyses to produce an integrated analysis or display for precise indication or alert to users of the systems including anaesthetists, nurses and other medical personnel, transport drivers and machine workers. The systems weight the outputs of one or more analysis algorithms including combinations of simultaneous, real-time R&K analysis, AEP spectral analysis-SEF-MF, Bi-coherence analysis, initial wave analysis, auditory response, arousal analysis, body movement analysis, 95% spectral edge analysis and anaesthetic phase and spectral energy variance measurement in association with a subject'"'"'s state of consciousness.
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Citations
15 Claims
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1. A method for acquiring, characterising and classifying biosignals from a living being for determining the state of consciousness of said being comprising:
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acquiring at least one continuous biosignal; stimulating an evoked potential response signal in said being; deriving at least one evoked potential response signal from said at least continuous biosignal using a processor; deriving a first index of consciousness from said continuous biosignal; deriving a second index of consciousness from said evoked potential response signal; and classifying said indices as being representative of entering or leaving consciousness according to a weighting process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification