声带息肉手术前后的声学评价

目的 用3项声学指标对声带息肉手术前后的动态变化进行比较分析，探讨它们在临床转归中的变化规律。方法 用声学软件对31名声带息肉或小结患者在术前及术后第1、3、5天分别测试并记录在发元音[i]及[a]时的基频微扰（Jitter)、幅度微扰（Shimmer)、谐噪比（HNR）值，并进行多因素方差分析及主成分分析。结果 Jitter、Shimmer均值术后比术前小，随着临床情况好转，呈减小趋势，HNR均值术后比术前大，随着临床情况好转，呈增大趋势，有统计学意义。结论 声学测试为声带息肉术后疗效评价提供一种简便有效的客观测试方法，能为术后治疗提供科学指导。

Acoustic Evaluation of Vocal Polyps Before and After Surgery Therapy

Purpose To use three acoustic parameters(Jitter,Shimmer,HNR)to analyze the dynamic changes in their values before and after vocal polyps or nodules surgery,try to find intrinsic regularity of the three parameters in clinical therapy. Methods We acquired the different parameter values by acoustic measurement software when voicing the vowel [a] and [i] in four phases(before surgery and the first,third,fifth day after surgery),proceed the statistical analysis(GLM and PCA). Results Either vowel [a] or [i],the mean values of Jitter and Shimmer decreased when time passed after surgery and the symptoms got better,and the values of HNR increased at the same time. Conclusions We suggest that acoustic measurement is a useful method in evaluating the surgery therapy effects after vocal polyps removal.