Objective To investigate the utility of anesthesia depth monitoring of BIS during general anesthesia without tracheal intubation.Methods Sixty patients underwent surgery with local anesthesia were randomly divided into three groups of Ⅰ ,Ⅱand Ⅲ,who were sedated with propofol by TCI propofol 1.0,1.5,2.0μg/ml,respectively.HR,MAP,SpO2 BIS and MOAA/S score were recorded at l0min before operation(T0) .during local anesthesia ( T1) , at 30min after incision (T2) , at 60min after incision (T3) , and the end of operation (T4).Results BIS values declined with the decrease of MOAA/S.MOAA/S score was lower in group Ⅲ than that in group Ⅰ (all P < 0.05).Respiratory depression was seen in 3 cases in group Ⅲ.The difference of MAP had statistical significance between level 3 and level 2 of MOAA/S in group Ⅱ and group Ⅲ (P < 0.05).Conclusion Propofol 1.0 ～ 1.5 μg/ml given by TCI could produce optimal depth of sedation with less side effects in surgery during local anesthesia.

‘Service-learning’is fashionable and advanced teaching concept and mode in many countries currently.Applying‘service-learning’concept and methods in medical ethics curriculum can form a new ethics education mode.Three methods were adopted to evaluate the new model:conducting questionnaires for all students participating in‘service-learning’activities,selecting part of the students to do face to face interview and selecting the core project-medical poverty relief activities.The results showed that the effect of new model was obvious,which was embodied by innovating practical teaching path,improving medical ethics study effect,satisfying human needs and cultivating noble spirits.