Method: Anesthesia was induced with midazolam, propofol, fentanyl and vecuronium by endotracheal intubation and retention with a low concentration of enflurane.

• 方法：采用咪唑安定、异丙酚、芬太尼、维库溴胺、低浓度安氟醚气管插管静吸复合麻醉。