Changes in pyriform sinus morphology in the head rotated position as assessed by 320-row area detector CT

Enri Nakayama, Hitoshi Kagaya, Eiichi Saitoh, Yoko Inamoto, Shuji Hashimoto, Naoko Fujii, Kazuhiro Katada, Daisuke Kanamori, Haruka Tohara, Koichiro Ueda

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)199-204
Number of pages6
JournalDysphagia
Volume28
Issue number2
DOIs
StatePublished - Jun 2013
Externally publishedYes

Keywords

  • 320-Row area detector CT
  • Deglutition
  • Deglutition disorders
  • Head rotation
  • Pyriform sinus

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Gastroenterology
  • Speech and Hearing

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