Method and apparatus for the estimation of anesthetic depth using wavelet analysis of the electroencephalogram
US7373198B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2003 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jan 29, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7267
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.