Pulmonary function tests are a broad range of tests that measure how well the lungs take in and exhale air and how efficiently they transfer oxygen into the blood. Spirometry measures how well the lungs exhale. Lung volume measurement detects restrictive lung diseases.
Pulmonary function tests are done to: Diagnose certain types of lung disease, such as asthma, bronchitis, and emphysema. Find the cause of shortness of breath. Measure whether exposure to chemicals at work affects lung function.
Pulmonary function tests (PFTs) are non-invasive tests that show how well the lungs are working. The tests measure lung volume, capacity, rates of flow, and gas exchange. This information can help your healthcare provider diagnose and decide the treatment of certain lung disorders.