Peak Expiratory Flow Rate

Peak Expiratory Flow Rate (PEFR) measures how fast a person can forcefully exhale air after taking a deep breath. It reflects the openness and airflow of the large airways in the lungs. Healthcare providers often use PEFR to assess lung function, monitor conditions like asthma, and detect early signs of airway narrowing or obstruction. A higher PEFR indicates better airway flow, while a lower value may suggest airway constriction or difficulty breathing. Regular monitoring helps manage respiratory health and adjust treatments as needed.