Objective:To investigate the strobovideolaryngoscopy, acoustic and aerodynamic characteristics of transient unilateral vocal ford paralysis（UVFP） after thyroidectomy. Methods:A retrospective analysis was made of 11 patients with temporary UVFP after thyroidectomy who were treated in Department of Otolaryngology and Head and Neck Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University from January 2013 to March 2021; 8 patients with permanent UVFP after thyroidectomy during the same period were included as a control group. The differences in baseline strobovideolaryngoscopy, acoustic and aerodynamic measures were compared between the two groups. Results:The tones of patients with temporary UVFP after thyroidectomy were all normal, and the proportions of abnormal vocal fords（vocal ford bowing, atrophy, and shortening）, ventricular adduction and glottic insufficiency were significantly lower than those of permanent UVFP patients; arytenoid cartilage stability and height mismatch of vocal ford tended to be better than permanent UVFP. The maximal phonation time（MPT） in patients with temporary UVFP was （8.5±4.1） s, which was significantly longer than （3.9±2.1） s in patients with permanent UVFP; fundamental frequency, mean airflow（MeAF） and mean subglottic pressure（SGP） were better in temporary UVFP than those in patients with permanent UVFP, but the difference did not reach statistical significance. Conclusion:None and mild glottic insufficiency, normal tone, ventricular adduction, and vocal ford appearances without vocal fold bowing, atrophy, and shortening, can be served as the predictors for the early recovery of vocal ford movement in temporary UVFP after thyroidectomy. The MPT less than 4 s, and MeAF, and SGP remarkably increased is the predictor of poor prognosis for vocal ford recovery.
目的：探讨甲状腺术后暂时性单侧声带麻痹的频闪喉镜及气流动力学特征。 方法：回顾性分析2013年1月-2021年3月就诊于中山大学孙逸仙纪念医院耳鼻咽喉头颈外科的11例甲状腺切除术后暂时性单侧声带麻痹患者；纳入同期8例甲状腺术后永久性单侧声带麻痹患者作为对照组。比较两组基线频闪喉镜声带麻痹评分、声学、气流动力学指标的差异。 结果：甲状腺术后暂时性单侧声带麻痹患者音调均正常，出现异形声带（弓形声带、声带萎缩及缩短）、室带内收及中重度声门闭合不全的比例均显著低于永久性声带麻痹患者；杓状软骨稳定性和无声带高度差呈优于永久性声带麻痹的趋势。暂时性声带麻痹患者最长声时（MPT）为（8.5±4.1）s，显著长于永久性声带麻痹患者的（3.9±2.1） s；基频微扰、平均气流量（MeAF）和声门下压（SGP）优于永久性声带麻痹患者，但差异无统计学意义。 结论：声门闭合良好或轻度闭合不全，音调正常，无室带内收，无声带萎缩、缩短及弓形声带等异形声带改变，是甲状腺术后暂时性声带麻痹早期的喉镜表现，提示可早期恢复声带运动。MPT小于4 s，MeAF和SGP明显升高是预后不良的气流动力学表现。.
Keywords: acoustic and aerodynamic assessment; strobovideolaryngoscopy; thyroid neoplasms; vocal fold paralysis.
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