Abstract: ［Abstract］ Non?recurrent laryngeal nerve （NRLN） is a rare anatomical variant. Because of the lateral shape of the vagus nerve after branching into the larynx， there is a higher risk of injury during thyroid surgery. Preoperative computed tomography （CT） examinations found the arteria lusoria can predict the possibility of the presence of right NRLN， so that the operation remains vigilant. Intraoperative neuromonitoring （IONM） confirms the presence of NRLN and helps protect the function of the recurrent laryngeal nerve.

Key words: NRLN, thyroid surgery, CT, IONM

摘要： ［摘要］ 非返性喉返神经（non?recurrent laryngeal nerve， NRLN）是一种罕见的解剖变异。由于从迷走神经分支后横向走形入喉，所以在甲状腺手术中有较高的损伤风险。术前CT发现迷走右锁骨下动脉可预判右侧NRLN存在的可能，使术中保持警惕性。术中神经监测（IONM）能证实NRLN的存在，并有助于保护喉返神经的功能。

关键词: 喉不返神经, 术前CT检查, 术中神经监测, 甲状腺手术