Peak Flow Meter
The peak flow meter is an airflow-measuring device that measures how forcefully you can push air out of your lungs as you exhale. It can be used as part of a full pulmonary function test (PFT) or alone. Peak flow meters can be used at home to determine when asthma or other pulmonary conditions are getting worse.
Related Resources
Your peak flow reading may be an early sign that your asthma is getting out of control.
Get detailed information on peak flow measurement, including how the procedure is performed.