Britton Deanna, Yorkston Kathryn M, Eadie Tanya, Stepp Cara E, Ciol Marcia A, Baylor Carolyn, Merati Albert L
Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, USA.
Ann Otol Rhinol Laryngol. 2012 Jan;121(1):21-7. doi: 10.1177/000348941212100105.
Little is known about the function of the true vocal folds (TVFs) during cough. The objective of this study was to determine the reliability of measuring TVF movements during cough and to obtain preliminary normative data for these measures.
Sequential glottal angles associated with TVF adduction and abduction across the phases of cough were analyzed from laryngeal videoendoscopy records of 38 young healthy individuals.
The intraobserver and interobserver reliability of 3 experienced measurers was high (intraclass correlation of at least 0.97) for measuring sequential and maximum glottal angles. The TVF abduction velocity during expulsion was significantly higher than the precompression adduction velocity (p = 0.002), but there were no significant differences in maximum angle. No statistically significant differences were seen in maximum TVF angle and velocity when they were compared between the sexes and between the levels of cough strength. True vocal fold closure following expulsion occurred in 42% of soft coughs and in 57% of moderate to hard coughs.
The TVF abduction angles during cough can be reliably measured from laryngeal videoendoscopy in young healthy individuals. The TVF movements are faster for expulsion abduction than for precompression adduction, but the extents of abduction are similar. To validly determine the cough phase duration, simultaneous measures of airflow are needed.
关于咳嗽时真性声带（TVF）的功能，目前所知甚少。本研究的目的是确定咳嗽期间测量TVF运动的可靠性，并获得这些测量的初步规范数据。
从38名年轻健康个体的喉镜视频内镜记录中分析咳嗽各阶段与TVF内收和外展相关的连续声门角。
3名经验丰富的测量者在测量连续和最大声门角时，观察者内和观察者间的可靠性很高（组内相关性至少为0.97）。呼气时TVF外展速度显著高于预压缩内收速度（p = 0.002），但最大角度无显著差异。在性别之间以及咳嗽强度水平之间比较最大TVF角度和速度时，未发现统计学上的显著差异。42%的轻度咳嗽和57%的中度至重度咳嗽在呼气后出现真性声带闭合。
在年轻健康个体中，可以通过喉镜视频内镜可靠地测量咳嗽期间的TVF外展角度。TVF呼气外展运动比预压缩内收运动更快，但外展程度相似。为了有效确定咳嗽阶段的持续时间，需要同时测量气流。
