What does a peak flow meter measure?

A peak flow meter is a device that measures how well air moves out of the lungs. This measurement is particularly significant for individuals with asthma, as it provides an indication of their lung function and can help monitor the severity of their condition. By assessing the peak expiratory flow rate (PEFR), patients can determine how effectively they are expelling air from their lungs, which is crucial in identifying any worsening of their asthma symptoms or the onset of an asthma attack. Regular use of a peak flow meter can allow patients to recognize patterns in their breathing and make informed decisions about their asthma management.