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 of: June 9, 2019

Author: Healthwise Staff
Medical Review: John Pope, MD, MPH - Pediatrics
Donald Sproule, MDCM, CCFP - Family Medicine
Adam Husney, MD - Family Medicine
Lora J. Stewart, MD - Allergy and Immunology, Pediatrics
Elizabeth T. Russo, MD - Internal Medicine

Is it an emergency?

If you or someone in your care has chest pains, difficulty breathing, or severe bleeding, it could be a life-threatening emergency. Call 9-1-1 or the local emergency number immediately.
If you are concerned about a possible poisoning or exposure to a toxic substance, call Poison Control now at 1-800-567-8911.

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