Erschienen in:
01.06.2013 | Original Article
Changes in Pyriform Sinus Morphology in the Head Rotated Position as Assessed by 320-Row Area Detector CT
verfasst von:
Enri Nakayama, Hitoshi Kagaya, Eiichi Saitoh, Yoko Inamoto, Shuji Hashimoto, Naoko Fujii, Kazuhiro Katada, Daisuke Kanamori, Haruka Tohara, Koichiro Ueda
Erschienen in:
Dysphagia
|
Ausgabe 2/2013
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Abstract
In patients with unilateral pharyngeal paresis and dysphagia, the head is rotated to the paretic side to prevent food flow to the rotated side during swallowing. Only a few studies to date have reported on pyriform sinus morphology upon head rotation. The purpose of this study was to measure the volume, depth, and cross-sectional area of the pyriform sinus during head rotation using 320-row area detector computed tomography. We imaged the neck during head rotation at 0° and at 30°, 45°, and 60° to the left or right in nine healthy young adults and determined the volume, depth, and cross-sectional area of the pyriform sinus in each position. On the rotated side, volume and cross-sectional area were significantly decreased at 60°. In contrast, volume, cross-sectional area, and depth were all significantly increased on the opposite side at 60°. These results suggest that head rotation at 60° significantly increases the volume, cross-sectional area, and depth of the opposite side, and significantly decreases the volume and depth of the rotated side of the pyriform sinus.