Medically reviewed by Daniel More, MD A peak flow meter is used to measure your peak expiratory flow rate (PEFR). PEFR describes how quickly your lungs expel air during a forceful exhalation after you ...

Peak Flow: The maximum flow of a stream in response to a rainstorm event. Base Flow: The portion of streamflow contributed by groundwater. As can be seen in the diagram below, peak flow changes ...

Many outpatients with moderate to severe COPD had suboptimal peak inspiratory flow and had inappropriate devices for measured PIF.

The hydraulic sizing of drainage and conveyance structures in urban settings always requires estimation of peak flow rates. Historically, the venerable Rational method has been the tool of choice for ...

Do not walk through flood waters; moving water, especially at these current rates ... Stevenson Dam, peak flows exceeded 30,000 cfs - about 10 times higher than average. Water flow levels are ...