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The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) and peak flow measurement, [1] is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air.
MMEF or MEF stands for maximal (mid-)expiratory flow and is the peak of expiratory flow as taken from the flow-volume curve and measured in liters per second. It should theoretically be identical to peak expiratory flow (PEF), which is, however, generally measured by a peak flow meter and given in liters per minute. [16]
Forced expiratory volume (time): a generic term indicating the volume of air exhaled under forced conditions in the first t seconds: FEV 1: Volume that has been exhaled at the end of the first second of forced expiration: FEF x: Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled ...
Nunn, A. J., and I. Gregg. 1989. New regression equations for predicting peak expiratory flow in adults. Br. Med. J. 298: 1068-1070 . Adapted by Clement Clarke for use in EU scale - see Peakflow.com > Predictive Normal Values (Nomogram, EU scale) Author: Mikael Häggström: Other versions.png-format.
Forced expiratory volume (time): a generic term indicating the volume of air exhaled under forced conditions in the first t seconds: FEV 1: Volume that has been exhaled at the end of the first second of forced expiration: FEF x: Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled ...
Forced expiratory volume (time): a generic term indicating the volume of air exhaled under forced conditions in the first t seconds: FEV 1: Volume that has been exhaled at the end of the first second of forced expiration: FEF x: Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled ...
Forced expiratory volume (time): a generic term indicating the volume of air exhaled under forced conditions in the first t seconds: FEV 1: Volume that has been exhaled at the end of the first second of forced expiration: FEF x: Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled ...
For example, maximum inspiratory flow is denoted FIF max. Unless otherwise specified, volume qualifiers indicate the volume inspired from RV at the point of measurement.) PEF: Peak expiratory flow: The highest forced expiratory flow measured with a peak flow meter: MVV