MEFVCMaximal Expiratory Flow-Volume Curves (lung health)
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It has been shown that maximum expiratory flow-volume curve (MEFVC) values measured by plethysmograph remain higher than values measured at the mouth.
Forced vital capacity (FVC), forced expiratory volume in 1s ([FEV.sub.1]), forced expiratory flow between 25 and 75% of vital capacity ([FEF.sub.25-75]), [FEF.sub.25, 50, 75] and MEFVC were obtained by the patient seated in the plethysmograph with the door closed.