Received: January 11, 2017 Revised: March 31, 2017 Accepted: April 01, 2017 Abstract: Background: Continuous cardiovascular monitoring as part of management of high-risk surgical patients is widely practiced, however the role of continuous monitoring as part of routine management in low-risk surgical patients is unclear. Our aim was to investigate haemodynamic and Bispectral Index (BIS) changes...

Background. Decreased spinal excitability contributes to the immobilizing effects of halogenated ethers during general anaesthesia. Recurrent spinal responses such as F-waves reflect spinal excitability and are suppressed by volatile anaesthetics. To evaluate whether F-waves are suitable for monitoring immobility, the concentration-dependent effects of sevoflurane on F-waves were compared with ...

BACKGROUND AND AIMS Bispectral index (BIS) values may be anaesthetic agent-specific, depending on their ability to suppress the electroencephalogram (EEG) signals. We carried out a prospective, randomised clinical trial to study the effect of nitrous oxide (N2O) on the BIS values at an equi-minimum alveolar concentration (MAC) of sevoflurane and desflurane. METHODS Sixty adult patients underg...

BACKGROUND The Bispectral Index (BIS) helps in the assessment of the depth of hypnosis. N-methyl-D-aspartic acid antagonist, ketamine, has been used in various doses to decrease postoperative morphine consumption. The purpose of our study was to compare the effects of two different doses (0.5 mg/kg and 0.2 mg/kg) of ketamine on BIS values. METHODS Forty-five ASA I or II patients undergoing ge...

BACKGROUND Manufacturers recommend maintaining anaesthesia at a bispectral index (BIS) or state entropy (SE) index value between 40 and 60. METHODS We prospectively studied 102 patients receiving propofol-sufentanil anaesthesia administered by anaesthetists blinded to these indices. The main endpoint was crude agreement (P(0)), defined as the proportion of agreement between BIS and SE index a...

BACKGROUND Processed EEG monitoring of anaesthetic depth could be useful in patients receiving general anaesthesia following subarachnoid haemorrhage. We conducted an observational study comparing performance characteristics of bispectral index (BIS) and entropy monitoring systems in these patients. METHODS Thirty-one patients of the World Federation of Neurosurgeons grades 1 and 2, undergoin...

Since 1997, bispectral index (BIS; Aspect Medical Systems Inc., Natick, MA) has been in clinical practice and a wealth of experimental research has accumulated on its use. Originally, the device was approved only for monitoring hypnosis and has now received an indication for reducing the incidence of intraoperative awareness during anesthesia. Numerous studies have documented the ability of BIS...

The Bispectral Index (BIS) is an empirically calibrated number derived from adult electroencephalograph data that correlates with the depth of sedation in adults. We tested the hypothesis that the BIS score is a valid measure of the depth of pediatric sedation in a study designed to avoid limitations of a previously published report. BIS values from 96 healthy ASA physical status I-II children ...

BACKGROUND The patient state index (PSI) and the bispectral index (BIS) quantify anaesthetic depth based on the EEG using different algorithms. We compared both indices with regard to the prediction of the depth of propofol anaesthesia. METHODS In 17 patients, propofol was infused until burst suppression occurred and stopped thereafter until BIS recovered to values above 60. This was repeated...