The document discusses the Acapella device, which uses oscillating positive expiratory pressure (OscPEP) therapy to clear pulmonary secretions. It can be used in various positions and takes less time than conventional chest physical therapy. The Acapella comes in different models and uses a plug-and-magnet system to create airflow oscillations during expiration. Application involves slow inspiratory breaths, breath holds, and forced expirations against resistance while adjusting settings based on clinical needs and feedback. Prescription of cycles depends on sputum volume and symptoms.