食管胸上段癌因其位置较高 ,多数患者需经右胸、腹、颈三切口完成手术。一般术时长、麻醉过程和手术创伤大 ,且因肿瘤与喉返神经关系密切易损伤 ,造成喉返神经麻痹出现术后呼吸道误吸 ,使呼吸道感染加重 ;同时术后多处刀口疼痛及胸胃限制了呼吸功能 ,影响肺功能的正常恢复。因? Upper esophageal cancer due to its high position, the majority of patients required by the right chest, abdomen, neck incision to complete the operation. General surgery duration, anesthesia and surgical trauma, and because of the tumor and the recurrent laryngeal nerve damage easily, resulting in recurrent laryngeal nerve paralysis postoperative respiratory aspiration, respiratory infections increased; at the same time, after multiple knife pain and chest stomach Restricted respiratory function, affecting the normal recovery of pulmonary function. because?