60
Participants
Start Date
January 1, 2007
Primary Completion Date
December 13, 2008
Study Completion Date
December 13, 2008
electroencephalography (EEG)
Four EEG channels were recorded using electrode positions as defined in the International 10-20 System with Ag/AgCl2 cup electrodes (Spes Medica) attached to the scalp with EC2 Electrode Cream (Grass Technologies). The impedance was set below 1 k, and the electrodes were attached to module S/5 E-EEG of the anaesthetic monitor S/5 (GE Healthcare).
bispectral index (BIS)
The BIS score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.
response and state entropy (RE and SE)
The respone and state entropy (RE and SE) score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.
middle latency auditory evoked potentials (MLAEP)
value of A-line Auto Regressive Index (AAI) derived from middle latency auditory evoked potentials (MLAEP) (A-line Monitor, Danmeter A/S, Odense, Denmark) was observed which measures the central nervous system responsiveness to a specific auditory stimulus
Medical University of Silesia, Sosnowiec
Silesian University of Medicine
OTHER
Medical University of Silesia
OTHER