What is a peak expiratory flow rate test? The peak expiratory flow rate (PEFR) test measures how fast a person can exhale. The PEFR test is also called peak flow. This test is commonly performed at ...

A peak flow meter is an inexpensive, portable, handheld device for those with asthma that is used to measure how well air moves out of your lungs. Measuring your peak flow using this meter is an ...

Gross 5 and others, 8 using kymographic tracings, demonstrated that the total time of the maximum forced expiratory-ventilatory effort was remarkably constant among normal persons of all ages as ...