OBJECTIVE: To identify the entropy levels that would correspond to bispectral index (BIS)
levels in general anesthesia (GA) induction in patients who will undergo elective lumbar disc …

Results: Induction OAA/S scores were in correlation with BIS and entropy values. Together
with the decreases in OAA/S scores, BIS and entropy values decreased as well, but the …

Background This multicenter study evaluated the effect of a new depth of anesthesia-
monitoring device based on time-frequency-balanced spectral entropy of …

Background and objectiveThis study was conducted to compare bispectral index, state
entropy and response entropy in patients undergoing coronary artery bypass grafting …

Methods: In this randomised controlled study, 72 American Society of Anesthesiologists'
physical status I and II patients undergoing general and orthopaedic surgeries were divided …

Comparison of entropy (state entropy [SE] and response entropy [RE]) with the bispectral
index (BIS) during propofol sedation in monitored anaesthesia care (MAC) was carried out …

Background: Hypotension, which is commonly associated with propofol induction of general
anesthesia in coronary artery bypass grafting (CABG) surgery, may cause adverse …

IMPLICATIONS: The electroencephalographic-based Entropy module seems to be a cost-
equivalent alternative to the bispectral index (BIS) monitor for assessing the level of …

Previous studies have confirmed the usefulness of Bispectral index (BIS) and spectral
entropy in non-neurosurgical patients. The effects of thiopentone or propofol on BIS and …

Background As a new electroencephalogram (EEG) signal processing technique for
monitoring the depth of anesthesia, entropy consists of two indices: reaction entropy (RE) …