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 ...

SAN FRANCISCO — Physicians can use peak expiratory flow as a first-line tool for assessing variable airflow limitations among patients with asthma, according to a poster presented at the ...

WASHINGTON — Ambient particulate matter pollution at the 2.5 µm scale influenced peak expiratory flow among adolescents in Mobile, Alabama, according to data presented at the American Thoracic ...