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:
Aug. 24, 2010
Filed:
Jul. 07, 2005
Mika Särkelä, Helsinki, FI;
Hanna E. Viertiö-oja, Espoo, FI;
Satu Jääskeläinen, Piispanristi, FI;
Jaakko Långsjö, Seinäjoki, FI;
Anu Maksimow, Turku, FI;
Elina Salmi, Turku, FI;
Harry Scheinin, Piispanristi, FI;
Mika Särkelä, Helsinki, FI;
Hanna E. Viertiö-Oja, Espoo, FI;
Satu Jääskeläinen, Piispanristi, FI;
Jaakko Långsjö, Seinäjoki, FI;
Anu Maksimow, Turku, FI;
Elina Salmi, Turku, FI;
Harry Scheinin, Piispanristi, FI;
The General Electric Company, Helsinki, FI;
Abstract
The invention relates to a method and apparatus for monitoring the cerebral state of a subject. At least one of a first and second parameters is derived from the physiological signal data obtained from the subject, wherein the first parameter is indicative of the sum of spectral values of the physiological signal data in a first frequency band lying above high frequency EEG activity and the second parameter is indicative of the relative magnitudes of a first sum of k-th order spectral values and a second sum of n-th order spectral values. The second sum is calculated over a frequency band lying above high frequency EEG activity (k>2 and n>1). A state index is then formed, which is dependent on the at least one parameter and indicative of the cerebral state of the subject. The first and second parameters may be used in the Bispectral Index (BIS™) algorithm.