MeSH 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.;
MeSH annotation : usually NIM; do not confuse with MAXIMAL MIDEXPIRATORY FLOW RATE; (MMFR); DF: MEFR; usually NIM; do not confuse with MAXIMAL MIDEXPIRATORY FLOW RATE; (MMFR);
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.