Which etiological structural factors are related to nasal obstruction in obstructive sleep apnea (OSA)?

Updated: Sep 15, 2020
  • Author: Himanshu Wickramasinghe, MD, MBBS; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Structural factors related to nasal obstruction that predispose patients with OSA to pharyngeal collapse during sleep include polyps, septal deviation, tumors, trauma, and stenosis. Structural factors related to retropalatal obstruction include (1) an elongated, posteriorly placed palate and uvula and (2) tonsil and adenoid hypertrophy (particularly in children). Structural factors related to retroglossal obstruction include macroglossia and tumor.

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