Falsely increased bispectral index values in a series of patients undergoing cardiac surgery using forced-air-warming therapy of the head

Anesth Analg. 2002 Aug;95(2):322-3, table of contents. doi: 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.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Anesthesia, General
  • Cardiac Surgical Procedures / adverse effects*
  • Electroencephalography / drug effects*
  • False Positive Reactions
  • Hemodynamics / drug effects
  • Humans
  • Male
  • Middle Aged
  • Monitoring, Intraoperative*
  • Rewarming / adverse effects*