METHOD AND SYSTEM FOR MONITORING AND DISPLAYING PHYSIOLOGICAL CONDITIONS
First Claim
1. A method for providing an indication of a state of awareness for a patient, comprising the steps of:
- acquiring a first EEG power spectrogram of a patient exposed to anesthesia;
comparing the first EEG power spectrogram to a second EEG power spectrogram, wherein the second EEG power spectrogram is associated with a known state of awareness; and
based on a similarity between the first EEG power spectrogram and the second EEG power spectrogram, providing an indication of a state of awareness of the patient.
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Abstract
A system and method is used for determining from EEG signals the lack of awareness and the depth of anesthesia of a patient to whom an anesthetic agent is being administered. In particular, a log-log representation of the EEG power spectrum of a current patient is compared to another log-log spectrum of a patient in a known condition. By comparison the awareness or depth of anesthesia of the current patient can be determined. The reference spectrum can be an average spectrum of many patients or a previously acquired spectrum of the current patient, or any other spectrum that can be statistically correlated with the current patient'"'"'s spectrum.
14 Citations
23 Claims
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1. A method for providing an indication of a state of awareness for a patient, comprising the steps of:
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acquiring a first EEG power spectrogram of a patient exposed to anesthesia; comparing the first EEG power spectrogram to a second EEG power spectrogram, wherein the second EEG power spectrogram is associated with a known state of awareness; and based on a similarity between the first EEG power spectrogram and the second EEG power spectrogram, providing an indication of a state of awareness of the patient. - 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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20. A method for providing an indication of a state of awareness for a patient, comprising the steps of:
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acquiring and storing a first EEG power spectrogram of a patient exposed to anesthesia; acquiring a second EEG power spectrogram, wherein the second EEG power spectrogram is acquired at a point in time after the first EEG power spectrogram; comparing the first EEG power spectrogram to a second EEG power spectrogram; and based on a similarity between the first EEG power spectrogram and the second EEG power spectrogram, providing an indication of a current state of awareness of the patient. - View Dependent Claims (21, 22, 23)
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Specification