• J-M Devys, L Uhrig, and M Piotin.
• Department of Anesthesiology and Intensive Care, Adolphe de Rothschild Fondation, 25-29 rue Manin, 75019 Paris, France. Electronic address: lynn.uhrig@gmail.com.
• Ann Fr Anesth Reanim. 2014 Jan 1;33(1):e15-7.

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

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