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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.

By Healthwise Staff
Primary Medical Reviewer John Pope, MD - Pediatrics
Specialist Medical Reviewer Lora J. Stewart, MD - Allergy and Immunology
Last Revised March 14, 2013

WebMD Medical Reference from Healthwise

Last Updated: March 14, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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