The impacts of open-mouth breathing on upper airway space in obstructive sleep apnea: 3-D MDCT analysis
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Eun Joong Kim Ji Ho Choi Kang Woo Kim Tae Hoon Kim Sang Hag Lee Heung Man Lee Chol Shin Ki Yeol Lee Seung Hoon Lee
- چاپ و سال / کشور: 2011
Description
Open-mouth breathing during sleep is a risk factor for obstructive sleep apnea (OSA) and is associated with increased disease severity and upper airway collapsibility. The aim of this study was to investigate the effect of open-mouth breathing on the upper airway space in patients with OSA using three-dimensional multi-detector computed tomography (3-D MDCT). The study design included a case–control study with planned data collection. The study was performed at a tertiary medical center. 3-D MDCT analysis was conducted on 52 patients with OSA under two experimental conditions: mouth closed and mouth open. Under these conditions, we measured the minimal cross-sectional area of the retropalatal and retroglossal regions (mXSA-RP, mXSA-RG), as well as the upper airway length (UAL), defined as the vertical dimension from hard palate to hyoid. We also computed the volume of the upper airway space by 3-D reconstruction of both conditions. When the mouth was open, mXSARP and mXSA-RG significantly decreased and the UAL significantly increased, irrespective of the severity of OSA. However, between the closed- and open-mouth states, there was no significant change in upper airway volume at any severity of OSA. Results suggest that the more elongated and narrow upper airway during open-mouth breathing may aggravate the collapsibility of the upper airway and, thus, negatively affect OSA severity.
Eur Arch Otorhinolaryngol (2011) 268:533–539, Received: 2 August 2010 / Accepted: 24 September 2010 / Published online: 19 October 2010 Springer-Verlag 2010
