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 ...

Many of us take our ability to breathe for granted, but if you have chronic lung disease or other respiratory issues, breathing can become a serious challenge. It’s important for those with ...