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A peak flow meter is an inexpensive, pocket-sized device that measures peak expiratory flow (PEF), or how fast 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.
Medical Review:Michael J. Sexton, MD - Pediatrics
Harold S. Nelson, MD - Allergy and Immunology
Harold S. Nelson, MD - Allergy and Immunology
Last Updated: 03/22/2007
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