FEF 25%-75%FVC | gemiddelde expiratore ademstroomsnelheid bij 25%-75% van de(geforceerde)vitale capaciteit(FVC) | MEF 25%-75%FVC
forced expiratory flow 25-75%,maximum midexpiratory flow(rate),FEF25-75,FMF25-75,MMEF25-75,MMF,MMFR | forced expiratory flow during the middle half of the forced vital capacity