Patent Document ID: RE41291
Application ID: 11232411
Patent Flag: 1

Claim One:
1. A method for administering an hypnotic drug to a patient to establish a desired hypnotic level in the patient , said method comprising the steps of: (a) establishing a reference signal corresponding to the desired hypnotic level to be provided established in the patient from the administration of the hypnotic drug ; (b) administering the hypnotic drug to the patient; (c) obtaining EEG signal data resulting from cerebral activity of the patient and obtaining EMG signals resulting from muscle activity of the patient ; (d) deriving at least one measure of the complexity characteristics of the EEG signal data; (e) deriving a measure of patient EMG activity; ( f ) determining the hypnotic level existing in the patient from the complexity characteristics of the EEG signal data combined with the derived measure of patient EMG activity and providing a feedback signal corresponding to the hypnotic level existing in the patient ; (f) ( g ) comparing the feedback signal corresponding to the hypnotic level existing in the patient as a result of the administration of the hypnotic drug to the reference signal corresponding to the desired hypnotic level to be established in the patient from the administration of the drug to produce a control signal, indicative of the difference between the desired hypnotic level and the existing hypnotic level ; and (g) ( h ) controlling the administration amount of the hypnotic drug administered to the patient in accordance with the comparison of step (f) control signal so that the hypnotic level of the patient is established and maintained at that corresponding to the reference signal .