The _______________ provides positive expiratory pressure (PEP)with oral airway oscillations.

Acapella device
The Acapella is a handheld airway clearance device.It provides positive expiratory pressure (PEP)with oral airway oscillations.Positive expiratory pressure stabilizes airways and improves aeration of the distal lung areas.During exhalation,pressure from the airways is transmitted to the Acapella device,which helps mucus dislodge from the airway walls and as a result prevents airway collapse,accelerates expiratory flow,and moves mucus toward the trachea.