Hyoid bone movement during swallowing and mechanism of pharyngeal residue in patients with profound intellectual and multiple disabilities

Tatsuya Nakamura, Yosuke Kita, Junpei Fujimoto, Koichi Ayuzawa, Hiroshi Ozawa

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Objectives: Dysphagia is linked to mortality risk among patients with profound intellectual and multiple disabilities (PIMD); the present study therefore aimed to clarify the characteristics of hyoid movements during swallowing and to examine the mechanism of dysphagia in patients with PIMD. Methods: A retrospective video fluoroscopic swallowing study was conducted on 43 patients with PIMD (mean age = 25.4; 25 males, 18 females) and 24 healthy adults (mean age = 44.3; 16 males, 8 females). The movements of the hyoid bone and mandible were tracked frame by frame in the video footage, and their range of movements and trajectories were analyzed. Results: Most patients showed atypical movement trajectories of the hyoid, such as insufficient anterior movement and increased range of mandibular downward movement, compared with normal adults. Moreover, the mechanism of dysphagia was revealed by structural equation modeling, indicating that insufficient anterior movement could lead to pharyngeal residue in the pyriform sinus. Conclusion: The insufficient anterior movement of the hyoid could be caused by weak ventral suprahyoid muscles and atypical head and neck posture characteristic of patients with PIMD. It may be useful to predict pharyngeal residue from the range of hyoid movements and trajectories for the prevention of aspiration.

本文言語English
論文番号110849
ジャーナルInternational Journal of Pediatric Otorhinolaryngology
149
DOI
出版ステータスPublished - 2021 10月
外部発表はい

ASJC Scopus subject areas

  • 小児科学、周産期医学および子どもの健康
  • 耳鼻咽喉科学

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