AIRR - ANZCA Institutional Research Repository
Skip navigation
Please use this identifier to cite or link to this item: http://hdl.handle.net/11055/604
Title: Bispectral index monitoring to prevent awareness during anaesthesia: the B-Aware randomised controlled trial.
Authors: Myles, PS
Leslie, K
McNeil, J
Forbes, A
Chan, MTV
ANZCA/FPM Author: Chan, MTV
Leslie, K
Myles, PS
Issue Date: May-2004
Citation: 363(9423):1757-63.
Abstract: BACKGROUND: Awareness is an uncommon complication of anaesthesia, affecting 0.1-0.2% of all surgical patients. Bispectral index (BIS) monitoring measures the depth of anaesthesia and facilitates anaesthetic titration. In this trial we determined whether BIS-guided anaesthesia reduced the incidence of awareness during surgery in adults. METHODS: We did a prospective, randomised, double-blind, multicentre trial. Adult patients at high risk of awareness were randomly allocated to BIS-guided anaesthesia or routine care. Patients were assessed by a blinded observer for awareness at 2-6 h, 24-36 h, and 30 days after surgery. An independent committee, blinded to group identity, assessed every report of awareness. The primary outcome measure was confirmed awareness under anaesthesia at any time. FINDINGS: Of 2463 eligible and consenting patients, 1225 were assigned to the BIS group and 1238 to the routine care group. There were two reports of awareness in the BIS-guided group and 11 reports in the routine care group (p=0.022). BIS-guided anaesthesia reduced the risk of awareness by 82% (95% CI 17-98%). INTERPRETATION: BIS-guided anaesthesia reduces the risk of awareness in at-risk adult surgical patients undergoing relaxant general anaesthesia. With a cost of routine BIS monitoring at US16 dollars per use in Australia and a number needed to treat of 138, the cost of preventing one case of awareness in high-risk patients is about 2200 dollars.
URI: http://hdl.handle.net/11055/604
PubMed URL: https://www.ncbi.nlm.nih.gov/pubmed/15172773
Study Name: B-Aware Trial
Journal Title: Lancet
Type: Journal Article
Affiliates: The Alfred Hospital
Study/Trial: Randomized Controlled Clinical Trial/Controlled Clinical Trial
Appears in Collections:Scholarly and Clinical

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.