J Rhinol > Volume 26(1); 2019
Journal of Rhinology 2019;26(1):21-25.
Published online May 31, 2019.
DOI: https://doi.org/10.18787/jr.2019.26.1.21   
Analysis of Obstruction Site in Obstructive Sleep Apnea Patients Based on Videofluoroscopy
Hye Rang Choi, Kyujin Han, Jiyeon Lee, Seok Chan Hong, Jin Kook Kim, Jae Hoon Cho
Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Konkuk University, Seoul, Korea. jaehoon@kuh.ac.kr
폐쇄성수면무호흡 환자에서 Videofluoroscopy를 사용한 폐쇄부위 연구
최혜랑, 한규진, 이지연, 홍석찬, 김진국, 조재훈
건국대학교 의과대학 이비인후-두경부외과학교실
Background and Objectives
Upper airway obstruction can occur at the soft palate, tongue base, or epiglottis among obstructive sleep apnea (OSA) patients. Detection of these obstruction sites is very important for choosing a treatment modality for OSA. The purpose of this study was to evaluate the obstruction site of OSA patients and its association with mouth opening and head position.
Forty-eight consecutive patients with suspicion of OSA were enrolled and underwent videofluoroscopy to evaluate the obstruction site, as well as polysomnography. Obstruction site, mouth opening, and head position were evaluated on videofluoroscopy, and their association was analyzed.
According to the videofluoroscopy, 47 (97.9%) of 48 patients showed an obstruction in the soft palate, while 24 (50.0%) were located in the tongue base and 14 (29.2%) in the epiglottis. Multiple obstructions were observed in many patients. Mean apnea-hypopnea index was higher among patients with tongue base obstruction (42.3±26.7) compared to those without obstruction (26.4±21.2, p=0.058). However, epiglottis obstruction did not influence apnea-hypopnea index. Mouth opening did not show any association with tongue base obstruction (p=0.564), while head flexion was highly associated (p<0.001).
Half of patients with OSA have tongue base obstruction, which worsens the apnea-hypopnea index. Head flexion is associated with tongue base obstruction, while mouth opening is not.
Key Words: Obstructive sleep apnea;Tongue base;Videofluoroscopy

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