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.
Copyright © 2013 Société française d’anesthésie et de réanimation (Sfar). Published by Elsevier SAS. All rights reserved.