The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2008
Filed:
Jul. 11, 2003
Stéphane Bibian, Vancouver, CA;
Tatjana Zikov, Shaker Heights, OH (US);
Guy Albert Dumont, Vancouver, CA;
Craig Robert Ries, Vancouver, CA;
Ernest Puil, Vancouver, CA;
Hossain Cyrus Ahmadi, Vancouver, CA;
Mihai Huzmezan, Vancouver, CA;
Bernard Ansell Macleod, Vancouver, CA;
Stéphane Bibian, Vancouver, CA;
Tatjana Zikov, Shaker Heights, OH (US);
Guy Albert Dumont, Vancouver, CA;
Craig Robert Ries, Vancouver, CA;
Ernest Puil, Vancouver, CA;
Hossain Cyrus Ahmadi, Vancouver, CA;
Mihai Huzmezan, Vancouver, CA;
Bernard Ansell Macleod, Vancouver, CA;
Bionova Technologies Inc., Vancouver, CA;
Abstract
A method and apparatus to monitor the neurologic state of a patient undergoing general anesthesia is provided. Previous automated systems to monitor the neurologic state of a patient undergoing general anesthesia involve a significant time delay between the patient's true hypnotic state and the computed indices. The present invention reduces this time delay by using a different analysis technique applied to spontaneous EEG. A wavelet decomposition and statistical analysis of the observed EEG is conducted and compared to reference data to provide a numerical indicator. In addition, this indicator is more consistent with the patient's loss of consciousness indicated by the loss of count event than previous systems.