How to measure your peak expiratory flow

Set meter to lowest number: Step 1

Photo of setting the peak flow meter at its lowest number
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Put the pointer on the gauge of the peak flow meter to 0 or the lowest number on the meter. In the photograph, this is about 50.

Last Updated: March 20, 2009

Medical Review: Michael J. Sexton, MD - Pediatrics & Harold S. Nelson, MD - Allergy and Immunology

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