A mouthpiece PEP device is a mouthpiece with different sized holes (expiratory openings) to provide resistance on the breath out, creating positive pressure in the lungs and airways .

The CF physiotherapist will choose the appropriate resistor by attaching a manometer or pressure gauge to the PEP device and measuring the pressure on expiration with different sized openings.

The most commonly used mouthpiece PEP devices are: Pari PEP original and Pari PEP S

Pari PEP: original (no longer sold)                                  

PEP S (now more widely used)

Website Terms of Use

All content and media on the CFPhysio website is created and published online for information purposes only. Before viewing the content on the this website you should read the website terms of use and privacy policy. The content in this website is not intended to be a substitute for professional medical advice and should not be relied upon as medical advice. If you have any concerns about your health, or concerns are raised from information on this website, please contact your treating doctor, qualified health professional or local clinic.