Conclusion: RLN injuries caused by mechanical injury during thyroid surgery is important.Delicate peration with gravity are the key point for prevention of the injury of RLN.

• 甲状腺肿瘤手术治疗特别是甲状腺癌时，为了达到根治效果，往往需做较大范围的淋巴清扫和肿瘤周围软组织切除，这无疑增加了喉返神经损伤的风险。