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KMID : 0361020220650120765
Korean Journal of Otolaryngology - Head and Neck Surgery
2022 Volume.65 No. 12 p.765 ~ p.771
Influence of Nasal Cavity Dimension and Sleep Posture on the Severity of Obstructive Sleep Apnea
Kim Sang-Yeop

Lee Seung-Hoon
Seo Min-Young
Abstract
Background and Objectives The aim of this study was to evaluate the effect of sleep positionand nasal cavity dimension according to minimal cross-sectional area (MCA) on the severityof obstructive sleep apnea (OSA).

Subjects and Method This study enrolled 528 consecutive patients who completed overnightpolysomnography (PSG) and acoustic rhinometry. Positional sleep time and apnea-hypopneaindex (AHI) were compared between the right and left lateral sleep positions (RLSPvs. LLSP), and between the wide and narrow lateral side sleep position (WLSP vs. NLSP) accordingto MCA.

Results The sleep time was longer for LSP than for WLSP (20.35%¡¾19.69% and 15.92%¡¾16.35%, respectively) with a statistically significant difference (p=0.001). However, the AHI wasnot significantly different between the two groups. The sleep time was longer for RLSP than forLLSP (20.65%¡¾19.31% and 15.39%¡¾16.05%, respectively) with a statistically significant difference(p<0.001). In the RLSP-dominant group, there were fewer left nasal cavity narrowed patientsthan right nasal cavity narrowed patients (91 vs. 129, respectively). Furthermore, in theLLSP-dominant group, there were fewer right nasal cavity narrowed patients than left nasal cavitynarrowed patients (60 vs. 85, respectively, p=0.001). However, we found that the AHI valuewas not significantly different according to sleep posture and nasal cavity dimension.

Conclusion Snoring patients preferred RLSP to LLSP, and preferred to sleep on the lateralside of the narrow nasal cavity. The OSA severity was not different according to sleep positionand nasal cavity dimension.
KEYWORD
Nasal obstruction, Nasal septum, Posture, Sleep apnea, obstructive.
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