SHAPE, VOLUME, AND CONTENT OF THE DEGLUTITIVE PHARYNGEAL CHAMBER IMAGED BY ULTRAFAST COMPUTERIZED-TOMOGRAPHY
SHAPE, VOLUME, AND CONTENT OF THE DEGLUTITIVE PHARYNGEAL CHAMBER IMAGED BY ULTRAFAST COMPUTERIZED-TOMOGRAPHY
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DOI：
10.1016/0016-5085(93)90144-2
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发表时间：
1993-11-01
期刊：
影响因子：
29.4
通讯作者：
HARIG, JM
中科院分区：
文献类型：
--
作者：
ERGUN, GA;KAHRILAS, PJ;HARIG, JM
背景：传统的放射摄影技术只能显示吞咽性咽腔的轮廓。本研究旨在准确成像吞咽过程中咽的水平面形状和内容物。方法：在吞咽过程中以每秒17次的速度获得咽部的动态计算机断层扫描图像。在不同体积的吞咽过程中，在8名受试者中对多个相邻水平进行成像，在4名受试者中对单个水平进行扫描。分析图像的面积、体积和吞咽咽腔的食团分数。结果：吞咽室扩大到约24 mL（在舌负荷）相比，平均15 mL的咽前容积。在整个10 mL吞咽过程中，无论轴向水平如何，大剂量均占据不到30%的管腔。吞咽腔的食团分数随吞咽量增加，食管上括约肌的尺寸和通过食管上括约肌的食团速度也随吞咽量增加。结论：吞咽咽腔通常为约15 mL的丸剂体积，这意味着在这些测试条件下必须吞咽15 mL的空气。大多数吞咽的空气来源于当口咽从上方和下方密封时被困在咽和喉内的空气。
Background: Conventional radiographic techniques image only the silhouettes of the deglutitive pharyngeal chamber. This study aimed to accurately image the horizontal plane shape and content of the pharynx during swallowing. Methods: Dynamic computerized tomography images of the pharynx were obtained at the rate of 17 per second during swallowing. Multiple adjacent levels were imaged in eight subjects and a single level was scanned in four subjects during swallows of varied volume. Images were analyzed for area, volume, and the bolus fraction of the deglutitive pharyngeal chamber. Results: The deglutitive chamber enlarged to approximately 24 mL (during tongue loading) compared with a preswallow pharyngeal volume averaging 15 mL. Throughout the 10 mL swallows, the bolus occupied less than 30% of the lumen regardless of axial level. The bolus fraction of the deglutitive chamber increased with swallow volume, as did the dimensions of the upper esophageal sphincter and the bolus velocity through the upper esophageal sphincter. Conclusions: The deglutitive pharyngeal chamber was typically approximately 15 mL> the bolus volume, implying that an obligatory 15 mL of air was swallowed under these test conditions. Most swallowed air originated as air trapped within the pharynx and larynx as the oropharynx was sealed from above and below.