OBJECTIVES: To evaluate the relationships between laryngeal inflammation assessed using the Reflux Finding Score (RFS), laryngeal sensory function, and apnea severity in patients with obstructive sleep apnea (OSA).
METHODS: Endoscopic sensory testing (EST) was performed with subsequent blinded scoring from video of RFS. An RFS > 7 was indicative of increased inflammatory change.
RESULTS: Of 34 patients evaluated, 29 had OSA (apneahypopnea index [AHI] ≥ 15 events/h) at polysomnography. Increased inflammation was present in 26/29 (90%), with changes suggestive of laryngopharyngeal reflux. There were significant correlations between: inflammation and OSA severity (eg, RFS vs AHI, r = 0.57, P < 0.001); inflammation and laryngeal sensory impairment (EST detection threshold and pressure required to elicit the laryngeal adductor reflex, LAR); and the degree of sensory impairment and OSA severity.
CONCLUSIONS: Laryngeal inflammation is prevalent among OSA patients and correlates with laryngeal sensory dysfunction, attenuation of the LAR, and apnea severity.
EBM rating: C-4
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