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Objective : To observe the laparoscopic cholecystectomy (LC) of isoflurane to maintain anesthesia during auditory evoked potentials index (AAI) and bispectral index (BIS) in the depth of anesthesia monitoring . Observation under inhalation anesthesia with BIS, AEP and hemodynamic changes , assessment monitoring methods inhalation anesthesia . Methods : 60 patients ASAI level elective LC, patients were randomly divided into AAI and BIS two groups , each group of 30 patients, routine intravenous induction of anesthesia , continuous inhalation of isoflurane maintain and adjust the inhaled concentration of 1.0 minimum alveolar concentration [MAC] call late the 1.5MAC, each concentration was maintained for 15 minutes, respectively, to record the basis of value ( T1 ) , endotracheal intubation (T2), the pneumoperitoneum after ( T3 ) , 1.0 minimum alveolar concentration [MAC] (T4 ) , 1.5 MAC (T5) and trachea tube can (T6) six point-in-time MAP , HR , AAI, BIS values ??. Results : T1-T6 at each time point compared sequence intubation AAI, BIS values ??significantly decreased (P <0.05) the end of surgery after extubation ( T6 ) AAI , BIS also significantly higher than before the induction of the underlying value low , both have more differences ( P <0.05 ) . T3 was significantly pneumoperitoneum after the BIS , AAI value has increased by elevated concentrations of AAI With the end isoflurane call the BIS value decreased significantly ( P <0.05 ) , and T5 decreased significantly ( P <0.05 ) compared with T4 . MAP, the HR -induced decline at T3 was significantly higher ( P <0.05 ) , in the end - tidal isoflurane concentration was decreased 1.5MAC (T5) , T4 T5 than no statistical significance . AAI and BIS are inhaled concentration of isoflurane good correlation with MAP, HR no good correlation . Conclusion : The combination of BIS, AAI monitoring can be more fully reflect the depth of anesthesia .
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