METHODS AND APPARATUS FOR MONITORING CONSCIOUSNESS
First Claim
1. An apparatus for acquiring physiological data from a living being for determining the state of consciousness of said living being, comprising:
- means for acquiring at least one continuous biosignal;
means for stimulating at least one evoked potential signal in said being;
means for acquiring said at least one evoked potential biosignal;
means for calculating at least two indices from each acquired biosignal and selecting an index from the calculated indices to represent the state of consciousness from the living being wherein a first of said indices is derived from a transformation of raw signal data according to a first transformation method and the second and subsequent of said indices is derived from a transformation of raw signal data according to a different transformation method or methods from said first transformation method;
wherein said first means for acquiring said first biosignal and said means for acquiring at least one evoked signal includes a single means.
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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.
49 Citations
19 Claims
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1. An apparatus for acquiring physiological data from a living being for determining the state of consciousness of said living being, comprising:
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means for acquiring at least one continuous biosignal; means for stimulating at least one evoked potential signal in said being; means for acquiring said at least one evoked potential biosignal; means for calculating at least two indices from each acquired biosignal and selecting an index from the calculated indices to represent the state of consciousness from the living being wherein a first of said indices is derived from a transformation of raw signal data according to a first transformation method and the second and subsequent of said indices is derived from a transformation of raw signal data according to a different transformation method or methods from said first transformation method; wherein said first means for acquiring said first biosignal and said means for acquiring at least one evoked signal includes a single means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification