The tracheal intubations were done under neuroleptanalgesia combined with topical spray of local anesthetic in 439 patients , intravenous anesthesia of sedative drugs and nondepolarizing relaxants of subnormal doses in 629 subjects , and total intravenous or inhaled anesthesia in 1 757 cases , respectively 其中439例采用神经安定镇痛-口咽表面麻醉， 629例采用静脉麻醉药镇静-小剂量肌松药麻醉， 1757例采用全静脉或吸入麻醉。
