The peak flow meter works by measuring how fast air comes out of the lungs when you exhale forcefully after inhaling fully. This measure is called a "peak expiratory flow," or "PEF." ...

A peak flow meter is a user-friendly, portable device that helps measure the ability of the lungs to expel air. It estimates peak expiratory flow rate which is a measure of how rapidly air can be ...

By Anjali Srivastava: A peak flow meter is a handy, portable device that measures how fast air leaves the lungs. It plays a vital role in asthma management by helping users track their lung ...

What a peak flow meter can tell you. Peak flow meters are inexpensive (the average price is around $15 to $20), handheld, and easy to use. You simply blow as hard as you can into the device and it ...

Peak flow meters are generally not very useful in controlling asthma. Most children can be controlled with symptoms alone. Children who are able to understand when they're having trouble breathing ...