Comparison of Two Electroencephalogram (EEG)-Derived Indices With Electroencephalogram Signals
Bispectral Index (BIS) and Entropy indices will be compared with each other, and to raw EEG signals in patients receiving sevoflurane anaesthesia. BIS and Entropy numbers often differ significantly from each other during surgery, and the reason for this has not been studied in detail, therefore remaining only poorly understood. BIS and Entropy, together with multi-channel EEG, will be collected and analyzed later on. Course of anaesthesia and surgery will be annotated. All relevant information from anaesthesia monitor will be collected on computer.
|Study Design:||Observational Model: Case-Only
Time Perspective: Prospective
|Official Title:||Comparison of Bispectral Index and Entropy With Electroencephalogram During Sevoflurane Anaesthesia|
- Morphology of electroencephalogram during discrepancy between Entropy and BIS index values [ Time Frame: 15 minutes ] [ Designated as safety issue: No ]
|Study Start Date:||December 2009|
|Study Completion Date:||March 2011|
|Primary Completion Date:||March 2011 (Final data collection date for primary outcome measure)|
Entropy - BIS
Patients undergoing surgery in sevoflurane anaesthesia.