An icon in the shape of a lightning bolt. Impact Link A peak flow meter is a device that measures how well your lungs expel air. The device is a valuable tool for people with a respiratory condition ...

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 ...