Efficacy of intraoperativeelectroencephalography monitoring and indocyanine green angiography to assess the safetyof parent artery sacrifice

：Objective To explore theefficacy of intraoperative electroencephalography (EEG) monitoring and indocyanine green(ICG) angiography to assess the safety of parent artery sacrifice in intracranial aneurysmsurgery.Methods From May to November 2008,intraoperative EEG monitoring and/or ICGangiography were used to assess the safety of sacrificing the parent artery in fivepatients.Intraoperative EEG monitoring was used in two patients,ICG angiography inone,both intraoperative EEG monitoring and ICG angiography in two.Results One patient withpoor cerebral collateral circulation evaluated by intraoperative EEG monitoring underwentcerebral revaseularization.The other one with poor cerebral collateral circulationevaluated by ICG angiography underwent parent artery sacrifice only and tolerated theiatrogenie isehemia postoperatively.Three patients underwent permanent occlusion of parentartery had no isehemie complication postoperatively,in which intraoperative EEG monitoringand/or ICG angiography demonstrated sufficient collateral blood flow.ConclusionIntraoperative EEG monitoring and ICG angiography can be used during intracranial aneurysmsurgery to determine patients' ability to tolerate permanent oeclusion of parentartery,combination of them may be more effective.