Move the marker back to the bottom, and repeat these steps two more times. If you cough or make a mistake, do not include this as one of your three tries.
Record the highest of the three numbers in your peak flow diary.
Updated by: Paula J. Busse, MD, Assistant Professor of Medicine, Division of Clinical Immunology, Mount Sinai School of Medicine, New York, NY, Review provided by VeriMed Healthcare Network.
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