Spirometry with FVL measurement is a vital component of the patient evaluation for respiratory symptoms, and when a properly performed FVL test is abnormal it should prompt a thorough investigation.

Pre- and post-exercise flow-volume loops are often recommended as an easy non-invasive method for diagnosing or excluding exercise-induced laryngeal obstructions in patients with exercise-related ...

Expiratory flow limitation is a hallmark finding in patients with severe airflow obstruction, as in COPD. It is extremely difficult for these patients to increase their expiratory flow above its ...