Fig. 2From: The effect of CPAP on the upper airway and ventilatory flow in patients with obstructive sleep apneaEffect of CPAP in subjects with epiglottis collapse The first subject developed epiglottis collapse starting from a Pmask of 2.4 cmH2O. In the second subject, a Pmask of around 2.5 cmH2O effectively eliminated partial epiglottis collapse. The last subject exhibited persistent epiglottis collapse despite high pressure levelsBack to article page