Bispectral index transiently decreased to "0" during per-embolization rupture of an intracranial aneurysm

Ann Fr Anesth Reanim. 2014 Jan;33(1):e15-7. doi: 10.1016/j.annfar.2013.11.023. Epub 2013 Dec 27.

Abstract

Interpreting a Bispectral Index (BIS) of "0", corresponding to an isolelectric electroencephalography, can be difficult. After ruling out technical issues, such as leads disconnection, several possible causes for a decrease in the BIS persists, including deep anesthesia, hypothermia, decrease in the cerebral perfusion pressure and cerebral ischemia. We report a sudden transient decrease of the BIS to "0" in a patient that underwent a coil embolization of a ruptured intracranial aneurysm and suggest that the change in BIS values could provide useful information about the cerebral hemodynamic during aneurysm treatment and might provide indications of a serious cerebral event.

Keywords: Anévrisme intracrânien; Index bispectral; Intracranial aneurysm; Ispectral Index (BIS); Per-embolization rupture; Rupture per-embolisation.

Publication types

  • Case Reports

MeSH terms

  • Anesthesia, General
  • Aneurysm, Ruptured / complications*
  • Aneurysm, Ruptured / therapy*
  • Brain Ischemia / etiology
  • Carotid Artery, External / physiology
  • Cerebral Angiography
  • Cerebrovascular Circulation
  • Consciousness Monitors*
  • Embolization, Therapeutic / adverse effects*
  • Eye / blood supply
  • Humans
  • Intraoperative Complications / diagnosis*
  • Intraoperative Complications / physiopathology
  • Male
  • Middle Aged
  • Monitoring, Intraoperative
  • Regional Blood Flow / physiology
  • Subarachnoid Hemorrhage / complications*
  • Subarachnoid Hemorrhage / therapy*
  • Tomography, X-Ray Computed