Abstract: The possibility of selective rather than routine preoperative laryngoscopy in thyroid surgery        GAO Xiang，WEI Xing-mei，HU Ya，et al. *Department of General Surgery，Peking Union Medical College Hospital，Peking Union Medical College & Chinese Academy of Medical Sciences，Beijing 100730，China
Corresponding author：LIAO Quan，E-mail：lqpumc@126.com
Abstract    Objective    To analyze the necessity of routine laryngoscopy and the possibility of selective laryngoscopy for thyroid surgery. Methods    The clinical data of 1906 patients who had performed pre-thyroidectomy laryngoscopy in Peking Union Medical College Hospital from January to December 2018 were analyzed retrospectively. Based on the preoperative laryngoscopy findings，the patients were divided into 2 groups：normal- vocal cord (NVC) group and vocal cord palsy (VCP) group．Univariate and multivariate logistic regression analyses were used to evaluate the association between the clinical variables and VCP. Results    Only 18（0.94%） patients were found to have a VCP with the pre-operative laryngoscopy. Using multivariate analysis by logistic regression，only presence of hoarseness (OR=19.094，95%CI 6.270—58.146，P<0.001)，nodule located in the posterior capsular (OR=27.976，95%CI 2.995—261.368，P=0.003) and previous neck surgery (OR=12.032，95%CI 2.058—261.368，P=0.006) were independent risk factors of pre-operative VCP. In the study，619 (32.5 %) patients had at least one independent risk factors，in which the incidence of VCP was 2.9% (18/619). If selective rather than routine preoperative laryngoscopy was implemented，1287 (67.5%) of patients would not have required preoperative laryngoscopy without missing a diagnosis of VCP. Conclusion Preoperative VCP is rare，and a selective preoperative laryngoscopy should be applied in those patients who has independent risk factors.

Key words: thyroidectomy, vocal cord paralysis, laryngoscopy, recurrent laryngeal nerve injury

摘要： 目的    探讨甲状腺手术病人术前选择性喉镜检查替代常规喉镜检查的可行性。方法    回顾性分析2018年1—12月北京协和医院收治的行术前喉镜检查的1906例甲状腺手术病人的临床资料，分析术前声带麻痹的影响因素。结果    仅18例（0.9%）病人发现术前声带麻痹。多因素分析表明，术前声音嘶哑（OR=19.094，95%CI 6.270~58.146，P<0.001）、结节位于后被膜（OR=27.976，95%CI 2.995~261.368，P=0.003）、既往有颈部手术史（OR=12.032，95%CI 2.058~261.368，P=0.006）为甲状腺术前声带麻痹的独立危险因素。术前有619例（32.5%）病人至少具备1个独立危险因素，其术前声带麻痹的发生率为2.9%（18/619）。如以选择性喉镜替代常规喉镜，1287例（67.5%）病人不必行术前喉镜检查，同时未遗漏术前声带麻痹的病人。结论    甲状腺手术病人术前声带麻痹的发生率较低，可选择性针对有独立危险因素的病人行术前喉镜检查。

关键词: 甲状腺手术, 声带麻痹, 喉镜, 喉返神经损伤