Positive Expiratory Pressure Device Acapella ChoicePortex Acapella Choice Vibratory PEP Device (Smiths Medical 27 7000 & 27 8000) from Portex is a respiratory breathing therapy device that vibrates to break up mucus and promotes respiratory secretions. The device can be used with the respiratory patient in any position relative to gravity, including sitting down, standing, or reclining. The Acapella Choice Valve helps to open airways in patients with lung disease who have secretory problems such as