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Man using a peak flow device

Calculating and interpreting Peak Expiratory Flow rate variability and reversibility

In this article, the authors provide a pragmatic consensus approach to calculating and interpreting peak expiratory flow rate (PEFR) variability and reversibility from peak flow diary recordings for asthma diagnosis. This guide is intended for healthcare professionals working in primary care. Please see the links in the references for more information on the evidence and value of peak flow monitoring