Bispectral and spectral entropy indices at propofol-induced loss of consciousness in young and elderly patients.

Comparison of C₅₀ for Propofol-remifentanil Target-controlled Infusion and Bispectral Index at Loss of Consciousness and Response to Painful Stimulus in Elderly and Young Patients.

BACKGROUND In this prospective randomized study, we compared the predicted blood and effect-site C 50 for propofol and remifentanil target-controlled infusion (TCI) and the bispectral index (BIS) values at loss of consciousness (LOC) and response to a standard noxious painful stimulus (LOS) in elderly and young patients, respectively. We hypothesized that the elderly patients will require lower...

Wide inter-individual variability of bispectral index and spectral entropy at loss of consciousness during increasing concentrations of dexmedetomidine, propofol, and sevoflurane.

BACKGROUND The bispectral index (BIS) and the spectral entropy (state entropy, SE, and response entropy, RE) are depth-of-anaesthesia monitors derived from EEG and have been developed to measure the effects of anaesthetics on the cerebral cortex. We studied whether they can differentiate consciousness from unconsciousness during increasing doses of three different anaesthetic agents. METHODS ...

Bispectral index monitoring during electroconvulsive therapy under propofol anaesthesia.

BACKGROUND The accuracy of the bispectral index (BIS) as a monitor of consciousness has not been well studied in patients who have abnormal electroencephalograms (EEG). METHODS We studied the changes in BIS, its subparameters, and spectral entropy of the EEG during 18 electroconvulsive treatments under propofol and succinylcholine anaesthesia. A single bifrontal EEG, and second subocular chan...

THE EFFECTS OF ANESTHETIC INDUCED LOSS OF CONSCIOUSNESS ON QUANTITATIVE ELECTROENCEPHALOGRAM, AND BISPECTRAL AND SPECTRAL ENTROPY INDICES Studies on Healthy Male Subjects

Effect of landiolol on bispectral index and spectral entropy responses to tracheal intubation during propofol anaesthesia.

BACKGROUND beta1-Adrenoceptor antagonists suppress the haemodynamic and arousal responses to tracheal intubation. The Entropy Module shows two spectral entropy-based indices, response entropy (RE) and state entropy (SE). The difference between RE and SE (RE-SE) may reflect nociception during general anaesthesia. In the present study, we investigated the effect of landiolol on entropy indices in...