A peak flow meter is used to measure your peak expiratory flow rate (PEFR).
PEFR describes how quickly your lungs expel air during a forceful exhalation after you fully inhale.
Peak flow monitoring is most often used in asthma management but is also helpful for managingemphysemaandchronic bronchitis.
Verywell / Cindy Chung
Verywell / Cindy Chung
What Is a Peak Flow Test Used For?
Monitoring peak flow helps you keep track of how open your airways (bronchi) are.
The most common recommendation is once a day in the morning before taking your asthma medication.
Always use the same brand and model peak flow meter every time to avoid meter-to-meter variations.
Your healthcare provider can make recommendations.
How much does a peak flow meter cost?
Peak flow meters are relatively inexpensive, especially plastic devices that have a spring system.
These are typically $10 to $25.
Digital peak flow meters are pricieranywhere from $30 to $100.
Certain digital models can record and track measurements electronically, which may be a feature worth considering.
What is a normal peak flow reading?
Ask any questions you have before taking your first measurement.
There are no food or drink restrictions for checking your peak flow.
Keep a Record
With time, peak flow testing can become a matter of routine.
Do mention the experience to your healthcare provider, as it may indicate poor control of your asthma.
For kids, this takes into consideration growth and expanding lung capacity.
Readings take only a minute or two and should be compared to your personal best peak flow measurement.
Your healthcare provider will let you know how many times a day you should use your meter.
American Lung Association.Measuring your peak flow rate.
Asthma and Allergy Foundation of America.Peak flow meters.
American Academy of Pediatrics.Peak flow meter.
University of Rochester Medical Center.Peak flow meter.
