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Peak flow
There are no significant risks.
Peak expiratory flow rate measurements are not as accurate as the spirometry measurements performed in a health care provider's office. Small changes in your peak flow may not mean significant changes in your lung function.
National Asthma Education and Prevention Program Expret Panel Report 3: Guidelines for the Diagnosis and Management of Asthma. Rockville, MD. National Heart, Lung, and Blood Institute, U.S. Dept. of Health and Human Services; 2007. NIH publication 08-4051.
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