Falsely increased bispectral index values in a series of patients undergoing cardiac surgery using forced-air-warming therapy of the head |
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| Authors: | Hemmerling Thomas M Fortier Joanne D |
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| Affiliation: | Department of Anesthesiology, Centre Hospitalier de l'Université de Montréal, H?tel-Dieu, Université de Montréal, Québec, Canada. thomashemmerling@hotmail.com |
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| Abstract: | IMPLICATIONS: 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. |
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