bispectral index


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bispectral index

a measure derived from the domain of time; the frequency and bispectral analysis of the encephalogram that correlates with depth of sedation and anesthesia in clinical medicine.
Farlex Partner Medical Dictionary © Farlex 2012

bispectral index

A measure of the depth of anaesthesia, which is used to titrate the dose of anaesthetic to prevent unintentional regain of consciousness, especially in patients receiving muscle relaxants to prevent movement, who may not provide visual cues indicating pain.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

bi·spec·tral in·dex

(bī-spek'trăl in'deks)
A measure derived from the domain of time; the frequency and bispectral analysis of the encephalogram that correlates with depth of sedation and anesthesia in clinical medicine.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

bispectral index

Abbreviation: BIS
An electroencephalographic measure of the effect of sedative and hypnotic drugs on an anesthetized patient. It is used (along with clinical assessment of the patient) to determine the level of central nervous system depression. The index ranges from zero (completely unresponsive to stimulation) to 100 (awake and alert). At levels below 60, most patients are adequately sedated for surgery.
See also: index
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Effects of neuromuscular block on systemic and cerebral hemodynamics and bispectral index during moderate or deep sedation in critically ill patients.
(23) Bispectral index is more intuitive than the GCS and easier to learn and use in the ward, making it a promising new tool to help neuroscience nurses.
Can bispectral index monitoring predict recovery of consciousness in patients with severe brain injury?
Beydon, "Raw EEG characteristics, bispectral index, and suppression ratio variations during generalized seizure in electroconvulsive therapy," British Journal of Anaesthesia, vol.
Bispectral index score and observer's assessment of awareness/sedation score may manifest divergence during onset of sedation: Study with midazolam and propofol.
Kenny, "Closed-loop control of anesthesia using bispectral index: performance assessment in patients undergoing major orthopedic surgery under combined general and regional anesthesia," Anesthesiology, vol.
The Bispectral Index is linked with effect site concentration [C.sub.e](t) through nonlinear sigmoid model [16]:
I read with interest the article by Hadavi and colleagues regarding the Evaluation of the Adequacy of General Anesthesia in Cesarean Section by Bispectral Index. (1)
Bispectral index and end-tidal tension of Sevoflurane were measured at the same time.