peak flow meter(redirected from peak expiratory flow)
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Related to peak expiratory flow: forced vital capacity
peak flow meter
A portable instrument that detects minute decreases in air flow, used by people with asthma to monitor small changes in breathing capacity.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.