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NARES: a risk factor for obstructive sleep apnea?

Matthias F Kramer1, Richard de la Chaux, Rose Fintelmann

  • 1Department of Oto-Rhino-Laryngology/Head and Neck Surgery, Ludwig-Maximillians-University, Munich, Germany. mkramer@hno.med.uni-muenchen.de

American Journal of Otolaryngology
|May 5, 2004
PubMed
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Nonallergic rhinitis with eosinophilia syndrome (NARES) significantly worsens obstructive sleep apnea syndrome (OSAS). NARES patients experienced severe OSAS, indicating chronic nasal inflammation contributes to sleep-disordered breathing.

Area of Science:

  • Otorhinolaryngology
  • Sleep Medicine
  • Immunology

Background:

  • Nonallergic rhinitis with eosinophilia syndrome (NARES) is a chronic nasal inflammation causing congestion and rhinorrhea.
  • Obstructive sleep apnea syndrome (OSAS) involves upper airway obstruction during sleep, leading to oxygen desaturation.
  • Nasal congestion is a known contributing factor to OSAS development.

Purpose of the Study:

  • To investigate whether NARES is a risk factor for developing or exacerbating OSAS.

Main Methods:

  • A cohort of 26 patients with sleep apnea symptoms was studied.
  • Ten patients diagnosed with NARES were compared to 16 age- and BMI-matched controls without nasal inflammation.
  • All participants underwent polysomnography to assess OSAS severity.

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Main Results:

  • NARES patients exhibited significantly poorer polysomnography results compared to controls.
  • Key impaired parameters included hypopnea index, apnea-hypopnea index, and oxygen saturation levels.
  • NARES patients were classified with severe OSAS, while controls had moderate OSAS.

Conclusions:

  • NARES is identified as a significant risk factor for the induction or worsening of OSAS.
  • Chronic nasal inflammation, as seen in NARES, appears to contribute to the pathogenesis of OSAS.
  • Potential mechanisms include nasal obstruction or neuro-reflex pathways, though further research is needed.