[Evaluation of Bispectral Index Time Delay in Response to Anesthesia Induction: an Observational Study]

Overview

Journal Braz J Anesthesiol

Specialty Anesthesiology

Date 2019 Aug 3

PMID 31371175

Citations 8

Authors

Ana Leitao Ferreira

Joaquim Gabriel Mendes

Catarina Sofia Nunes

Pedro Amorim

Affiliations

Soon will be listed here.

Abstract

Background And Objectives: According to the manufacturer, the Bispectral Index (BIS) has a processing time delay of 5-10s. Studies addressing this have suggested longer delays. We evaluated the time delay in the Bispectral Index response.

Methods: Based on clinical data from 45 patients, using the difference between the predicted and the real BIS, calculated during a fixed 3minutes period after the moment the Bispectral Index dropped below 80 during the induction of general anesthesia with propofol and remifentanil.

Results: The difference between the predicted and the real BIS was in average 30.09±18.73s.

Conclusion: Our results may be another indication that the delay in BIS processing may be much longer than stated by the manufacture, a fact with clinical implications.

Citing Articles

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Comparative Efficacy of Intraoperative Patient State Index vs. Bi-Spectral Index in Patients Undergoing Elective Spine Surgery with Neuromonitoring Under General Anaesthesia: A Randomized Controlled Trial.

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Substance-dependent EEG during recovery from anesthesia and optimization of monitoring.

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PMID: 38108943 PMC: 11164797. DOI: 10.1007/s10877-023-01103-4.

Unveiling age-independent spectral markers of propofol-induced loss of consciousness by decomposing the electroencephalographic spectrum into its periodic and aperiodic components.

Leroy S, Major S, Bublitz V, Dreier J, Koch S Front Aging Neurosci. 2023; 14:1076393.

PMID: 36742202 PMC: 9889977. DOI: 10.3389/fnagi.2022.1076393.

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