peak flow meter

noun

Definition of peak flow meter

: a device that measures the maximum rate of air flow out of the lungs during forced expiration and that is used especially for monitoring lung capacity of asthmatics

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Low readings on a peak flow meter, a different portable device that measures lung capacity, can also be a sign of an asthma attack, the Mayo Clinic says. — Korin Miller, SELF, "9 Asthma Symptoms Absolutely Everyone Should Know," 1 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'peak flow meter.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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The first known use of peak flow meter was in 1962

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peak flow meter

noun

\ˌpēk-ˈflō-

Medical Definition of peak flow meter

: a device that measures the maximum rate of air flow out of the lungs during forced expiration and that is used especially for monitoring lung capacity of individuals with asthma (as to indicate bronchial narrowing)

— called also peak expiratory flow meter