flow

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Related to maximal expiratory flow: forced expiratory flow, forced expiratory flow rate

flow

a measurement of quantity over a specified period of time. Unlike a STOCK, which is not a function of time, a flow measures quantity passing per minute, hour, day or whatever. A common analogy is to a reservoir. The water entering and leaving the reservoir is a flow but the water actually in the reservoir at any one point in time is a stock. INCOME is a flow but WEALTH is a stock.
References in periodicals archive ?
Maximal expiratory flow and volume in Chinese aged 60 years and over.
[4] The use of flows such as the maximal expiratory flow (MEF) after 25-75% of expired FVC (ME[F.sub.25-75%]) is not useful for measuring bronchodilator response, as these indices show high variability.
MEF75%1 sec is the maximal expiratory flow at 75% of expiratory forced vital capacity before end of expiration.

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