Application of cerebral state index monitoring in the elderly undergoing general anesthesia

Objective To investigate the application of cerebral state index(CSI) monitoring in the elderly undergoing general anesthesia.Methods Sixty patients aged(70±10)years old undergoing general anesthesia were equally randomized into two groups.The patients in group A were given anesthetic drugs guided by CSI level of 50±5 and those in group B according to the clinical experience.The MAP,HR,SpO2 and CSI were monitored before induction(T0),at 3 min after intubation(T1),during surgical exploration(T2) and at the end of operation(T3).The time of awakening from anesthesia was recorded.Results The MAP and HR in group B were lower at T1-T3 than those at T0(P0.05),which were stable in group A.CSI values at T1 and T2 were higher in group B than those in group A(P0.05).In group B,the awareness during operation occurred in 2 cases and delayed awakening in 8 cases.Conclusion Management of general anesthesia with a guidance of CSI is helpful in maintaining hemodynamic stability and avoiding awareness during operation.