Peak flow measurement is the maximum flow rate generated during a forceful exhalation. Peak flow rate monitoring can be performed by most patients from ages 5 years and older.
It is most commonly measured by a portable flow gauge device called a peak flow meter. This tool is most commonly used for asthma patients to help manage their asthma symptoms and to help their doctor to best treat them.
To use this device you will inhale as deeply as you can, filling your lungs to full capacity. You then place the mouth piece into your mouth and exhale as forcefully and as fast as you can.
It is best to get a peak flow measurement before AND after you take a breathing treatment or use an inhaler.
Keep a written log of your recordings to show your doctor at your next office visit.