Peak flow

Alternative names
Peak expiratory flow rate

Definition

The peak expiratory flow rate measures how fast a person can exhale air. It is one of many tests that measure the function of the airways, which are commonly affected by diseases such as Asthma, or Chronic obstructive pulmonary disease (COPD, usually a combination of Emphysema and Chronic bronchitis).

Also check Peak expiratory flow rate.

Johns Hopkins patient information

Last revised: December 2, 2012
by Arthur A. Poghosian, M.D.

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