Dichotomous physiological effects of nocturnal external nasal dilation in heavy snorers: the answer to a rhinologic controversy?

American Journal of Rhinology
P G DjupeslandA K Borgersen

Abstract

The purpose of this article was to study the impact of external dilation on nasal airway dimensions, sleep architecture, and snoring. Eighteen heavy snorers without severe obstructive sleep apnea syndrome (mean apnea-hypopnea index (AHI) 9.3) reporting nocturnal nasal obstruction were enrolled in a randomized (controlled) cross-over study, evaluating subjective and objective effects of external nasal dilation (Breathe Right, 3M). The active dilator was also worn during a one-week pretrial run-in period. Polysomnography, recording of snoring sounds, and repeated acoustic rhinometry were performed on two consecutive nights, one with the active dilator and one with a placebo strip. The significant subjective improvement reported during the run-in period compared to the preceding period without dilator (p < 0.01), remained only for nasal patency (p < 0.05) when comparing the two nights in the sleep laboratory. The nasal dimensions increased significantly (p < 0.001) with the active dilator compared to placebo, both in the evening and the next morning. In a subgroup (n = 6) of habitual snorers (AHI < 10) with severe morning obstruction (combined minimal cross-sectional area < 0.6 cm2), external dilation significantly improved the me...Continue Reading

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