A peak expiratory flow rate (PEFR) measures how effectively you exhale. Also called a peak flow meter, this handheld device helps you document the amount of air and the speed at which you can ...

A peak flow meter is a simple, small, hand-held tool that can help you maintain control of asthma by providing a measurement of how well air moves out of the lungs. After blowing into the device, the ...

Please provide your email address to receive an email when new articles are posted on . This study included adults in Nepal, Peru and Uganda. Discriminative performance improved after adding ...