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Definition of Forced expiratory volume

Forced expiratory volume: The volume of air that can be forced out taking a deep breath, an important measure of pulmonary function. The forced expiratory volume in the first second is the FEV1.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=20404
Last Editorial Review: 6/14/2012

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