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:
Oct. 13, 2009
Filed:
Apr. 17, 2008
Stéphane Bibian, Vancouver, CA;
Tatjana Zikov, Shaker Heights, OH (US);
Guy Albert Dumont, Vancouver, CA;
Craig Robert Ries, Vancouver, CA;
Ernest Puil, Vancouver, CA;
Hosaain 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;
Hosaain Cyrus Ahmadi, Vancouver, CA;
Mihai Huzmezan, Vancouver, CA;
Bernard Ansell MacLeod, Vancouver, CA;
BioNova Technologies Inc., Vancouver, BC, CA;
Abstract
A method and apparatus to monitor and control the anesthesia state of a patient undergoing general anesthesia is provided. Previous automated systems to monitor the anesthesia state of a patient undergoing general anesthesia involve a significant time delay between the patient's true anesthesia state and the computed indices. The present invention reduces this time delay by using a novel analysis technique applied to spontaneous electrophysiological activity. A transformation and statistical analysis of the observed electrophysiological activity is conducted and compared to reference data to provide numerical indicators. In addition, these indicators are consistent with the levels of depression of patients CNS and ANS states. This method is illustrated in detail by CNS monitoring of electroencephalogram signals.