RESUMEN
Objective To study the feasibility of cerebral state index(CSI)modulating the depth of general anesthesia in the elderly with laryngeal mask anesthesia.Methods Tmenty-four ASA physical status of Ⅱ-Ⅲ patients undergoing selective lower abdominal surgery were divided two groups with 12 cases.The anesthesia was induced by sufentanil、 propofuland maintained with TCI propofol.The depth of anesthesia was modulated by CSI index in group I or by hemodynamics in group Ⅱ.HR、SBP、DBP、MAP and CSI were recorded.The time of awakening form anesthesia(the time when OAA/S reached 4 score after the drawal of propofol)and the dosage of propofol and fentanyl were recored.Results The time of awakening from anesthesia was 16?5min in group Ⅱ,which was significantly longer than that in group I(P