Conclusion It was best that Midazolam (i.v) in the meantime with induction to prevent from awareness, reduce anesthetic sum, shorten the anesthesia recovery time and steady patient conditions.

• 结论：与诱导同时注射咪唑安定效果最佳，且能减少全麻药用量，缩短麻醉苏醒时间，稳定病情。