Pulmonary Function Testing

Learn how helium dilution measures FRC, calculates lung volumes, and helps evaluate obstructive and restrictive disease.

Learn how nitrogen washout measures FRC, evaluates lung volumes, and helps detect uneven ventilation and air trapping.

Learn about lung capacities in pulmonary function testing, their normal values, and how they help identify respiratory disease patterns.

Learn about lung volumes in pulmonary function testing, their normal values, and how they help identify respiratory disease patterns.

Learn what peak flow measures, how PEFR testing works, and why it helps monitor asthma, airflow obstruction, and bronchodilator response.

Learn about exhaled nitric oxide (FeNO), how the test works, and how it helps assess asthma-related airway inflammation.

Learn how to interpret a flow-volume loop, identify patterns, and detect obstructive, restrictive, and upper airway disorders.

Learn about maximum expiratory pressure (MEP), how it’s measured, what it indicates, and its role in respiratory muscle strength and care.

Learn how the 6-minute walk test evaluates functional capacity, tracks disease progression, and helps guide treatment decisions.

Learn about Maximum Inspiratory Pressure (MIP), how it’s measured, normal values, and its role in assessing respiratory muscle strength.

Learn spirometry interpretation and bronchodilator response to identify reversible vs fixed airway obstruction and guide diagnosis.