Ohmae Y, Logemann J A, Kaiser P, Hanson D G, Kahrilas P J
National Defense Medical College, Department of Otolaryngology, Saitama, Japan.
Head Neck. 1995 Sep-Oct;17(5):394-402. doi: 10.1002/hed.2880170506.
The purpose of this study was to determine the temporal characteristics and patterns of glottic closure during normal swallow using concurrent videofluoroscopy and videoendoscopy.
Three swallows each of four bolus types were examined in eight healthy volunteers with the endoscope in two positions: at the level of the uvula and at the laryngeal vestibule. Data analysis compared: (1) temporal relationships between laryngeal behaviors and oropharyngeal swallow events and (2) airway conditions at the time of key oropharyngeal events.
Although arytenoid adduction and subsequent arytenoid contact occurred as one of the initial events during swallow, the timing of these events was highly variable. On the other hand, true vocal cord (TVC) closure occurred mainly after the onset of laryngeal elevation, and it was affected by bolus volume.
In normal swallow, arytenoid closure did not always mean complete TVC closure, and complete TVC closure might be accomplished during the process of laryngeal elevation and arytenoid tilting.
本研究的目的是通过同步荧光透视和视频内窥镜检查来确定正常吞咽过程中声门关闭的时间特征和模式。
在八名健康志愿者中，对四种不同类型食团各进行三次吞咽检查，内窥镜置于两个位置：悬雍垂水平和喉前庭。数据分析比较了：（1）喉部行为与口咽吞咽事件之间的时间关系，以及（2）关键口咽事件发生时的气道状况。
虽然杓状软骨内收及随后的杓状软骨接触是吞咽过程中的初始事件之一，但这些事件的时间高度可变。另一方面，真声带（TVC）关闭主要发生在喉部抬高开始之后，并且受食团体积影响。
在正常吞咽中，杓状软骨关闭并不总是意味着TVC完全关闭，而TVC完全关闭可能在喉部抬高和杓状软骨倾斜过程中完成。
