Heidi Splete April 07, 2023 Use of an oronasal mask for delivery of continuous positive airway pressure (CPAP) was associated with increased upper airway collapsibility and the need for greater therapeutic pressure compared to nasal masks, as indicated by data from 14 individuals with obstructive sleep apnea (OSA). Previous research has linked oronasal mask use to lower adherence, higher residual apnea...