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Maximal Expiratory Flow Rate

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Definition: The airflow rate measured during the first liter expired after the first 200 ml have been exhausted during a FORCED VITAL CAPACITY determination. Common abbreviations are MEFR, FEF 200-1200, and FEF 0.2-1.2.  usually NIM; do not confuse with MAXIMAL MIDEXPIRATORY FLOW RATE; (MMFR); DF: MEFR    Other names Forced Expiratory Flow 200-1200; Forced Expiratory Flow 0.2-1.2; Forced Expiratory Flow 200 1200; Forced Expiratory Flow 0.2 1.2; Flow Rate, Maximal Expiratory; MEFR

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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