Falsely Increased Bispectral Index Values in a Series of Patients Undergoing Cardiac Surgery Using Forced-Air-Warming Therapy of the Head
- 1 August 2002
- journal article
- case report
- Published by Wolters Kluwer Health in Anesthesia & Analgesia
- Vol. 95 (2) , 322-323
- https://doi.org/10.1097/00000539-200208000-00014
Abstract
Falsely increased bispectral index (BIS) values of >70 occur during forced-warm-air therapy in patients undergoing cardiac surgery. When forced-warm-air therapy for the head is used (as in ultra-fast-tracking cardiac patients), BIS interpretation needs careful examination. Falsely increased BIS values can easily be recognized when the warm-air flow is stopped. Within 2-3 min, BIS returns to a much lower, "true" value.Keywords
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