J Rhinol.  2019 May;26(1):8-15. 10.18787/jr.2019.26.1.8.

Effect of Endonasal Dilator on Nasal Airflow and Sleep Test Index on Sleep Apnea Patients

Affiliations
  • 1Department of Otorhinolaryngology, Inha University College of Medicine, Incheon, Korea. inhaorl@inha.ac.kr

Abstract

BACKGROUND AND OBJECTIVES
We aimed to evaluate effects of endonasal dilators (END) on sleep quality in patients with obstructive sleep apnea (OSA) by improving nasal airflow.
MATERIALS AND METHODS
In 13 patients with OSA, changes of total nasal volume (TNV) and minimal cross-sectional area (MCA) before and after END use were evaluated. The change in peak nasal inspiratory flow (PNIF) was also measured. Subjects completed Epworth Sleepiness Scale questionnaire before and 2 weeks after END use. Finally, changes in apnea-hypopnea index (AHI), respiratory distress index (RDI), oxygen desaturation index (ODI), sleep time, sleep position and loudness of snoring (in decibels) were obtained by repetitive portable polysomnography.
RESULTS
After END use, TNV (11.4±3.1 cm3 to 19.4±5.7 cm3) and MCA (0.7±0.2 cm2 to 0.9±0.1 cm2) increased significantly (p=0.001). PNIF also increased significantly after END (147.3±39.5 to 194.6±57.6 liter/min, p=0.001). Among 11 patients undergoing 2-week follow-up, 7 reported improvement in daytime sleepiness. Although AHI, RDI and ODI showed no statistically significant change before and after END (p>0.05), the proportion of subjects sleeping in the supine position increased from 38.0 to 44.5%.
CONCLUSION
END may be an effective adjunctive tool for patients with OSA with the potential to improve nasal airflow and daytime sleepiness.

Keyword

Obstructive sleep apnea; Nasal cavity; Hypersomnolence
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