Perioperative cerebral ischaemia in cardiac surgery and BIS

Anaesth Intensive Care. 2005 Aug;33(4):514-7. doi: 10.1177/0310057X0503300415.

Abstract

A 46-year-old woman was monitored by bispectral index monitoring (BIS) during redo aortic and mitral valve replacement. On release of the aortic cross clamp there was a sudden, severe, unexplained, and sustained fall in the BIS value. Postoperatively, a CT scan was consistent with multiple ischaemic lesions. The lesions were presumed to be due to air embolism. This case suggests that a sudden unexplained and persistent fall in BIS may indicate cerebral ischaemia.

Publication types

  • Case Reports

MeSH terms

  • Brain / diagnostic imaging
  • Brain Edema / diagnosis
  • Brain Edema / etiology
  • Brain Ischemia / complications
  • Brain Ischemia / diagnosis*
  • Cardiac Surgical Procedures / adverse effects*
  • Cardiac Surgical Procedures / methods*
  • Cardiopulmonary Bypass / adverse effects
  • Cardiopulmonary Bypass / methods
  • Electroencephalography / methods*
  • Embolism, Air
  • Fatal Outcome
  • Female
  • Humans
  • Intraoperative Complications / diagnosis*
  • Middle Aged
  • Monitoring, Intraoperative / methods*
  • Tomography, X-Ray Computed / methods