Letter P

Peak expiratory flow

Abbreviated PEF.

The maximum airflow during a forced expiration beginning with the lungs fully inflated.

The PEF is reduced in proportion to the severity of the airway obstruction, as in asthma and COPD (chronic obstructive pulmonary disease)

Medical disclaimer

The information on this page is for educational and informational purposes only and does not constitute medical advice in any way.

It does not replace the advice of a physician, pharmacist or other healthcare professional.
It does not represent a prescription of drugs, diagnostic exams or therapies.
In case of symptoms, doubts or concerns about your health, always consult a qualified physician.

In case of emergency call 911 (US) or 112 (EU).