Medically reviewed by Daniel More, MD 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 ...

[54] These findings can easily be mistaken for and managed as an infiltrate associated with ACS, instead of an acute asthma exacerbation. Treatment to reduce asthma-related morbidity requires that ...