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 fully inhale. Regularly conducting a ...

By Anjali Srivastava: A peak flow meter is a handy, portable device that measures how fast air leaves the lungs. It plays a vital role in asthma management by helping users track their lung function ...