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In patients with neuromuscular disorders, no randomized studies have been performed whether nasal or oronasal masks should be preferred. Oronasal masks are often used in acute respiratory failure, while nasal masks are preferred in patients with chronic respiratory failure. However, the use of nasal masks can result in mouth leaks with implications on sleep quality. To reduce these leaks, oronasal masks have been applied during home noninvasive ventilation (NIV). Until now, upper airway obstruction during NIV has been thought to be induced by nasal obstruction, pharyngeal collapse, and/or glottis closure. We report a case indicating another cause of upper airway obstruction: use of an oronasal mask can induce obstructive events in the upper airways, possibly resulting in sleep fragmentation and decreased efficiency of NIV.

Upper Airway Obstruction during Noninvasive Ventilation Induced by the Use of an Oronasal Mask