Maximum Expiratory Flow Rate

flow (flo)

1. the movement of a liquid or gas.

2. the rate at which a fluid passes through an organ or part, expressed as volume per unit of time.

blood flow

1. circulation (of the blood).

effective renal blood flow (ERBF) that portion of the total blood flow through the kidneys that perfuses functional renal tissue such as the glomeruli.

effective renal plasma flow (ERPF) the amount of plasma that perfuses the renal tubules per unit time, generally measured by the clearance rate of -aminohippurate.

forced expiratory flow (FEF) the rate of airflow recorded in measurements of forced vital capacity.

maximum expiratory flow the rate of airflow during a forced vital capacity maneuver, often specified at a given volume.

maximum midexpiratory flow the average rate of airflow measured between exhaled volumes of 25 and 75 per cent of the vital capacity during a forced exhalation.

peak expiratory flow (PEF) the greatest rate of airflow that can be achieved during forced exhalation beginning with the lungs fully inflated.

renal plasma flow (RPF) the amount of plasma that perfuses the kidneys per unit time, approximately 10 per cent greater than the effective renal plasma flow.

maximum expiratory flow, maximum expiratory flow rate.

See maximal expiratory flow rate.

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