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Peak Flow Meters

Three types of peak flow meters

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A peak flow meter is an inexpensive, pocket-size device that measures peak expiratory flow (PEF), or how much air a person can breathe out. To measure PEF, the person takes a deep breath and then blows into a tube on the peak flow meter as hard and as fast as possible. This can be done at home.

Peak flow meters come in many shapes and sizes.

Current as ofSeptember 5, 2018

Author: Healthwise Staff
John Pope, MD, MPH - Pediatrics
Adam Husney, MD - Family Medicine
Elizabeth T. Russo, MD - Internal Medicine

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