Pulmonary Function Tests
A pulmonary function test (PFT), also known as a spirometry test, is a diagnostic test to measure the function of the lungs.
Reasons for PFT
A pulmonary function test is performed for several reasons. It is used to evaluate the condition of the lungs, especially after a diagnosis has been made, to determine the effectiveness of the medication being used. These tests can diagnose lung diseases such as:
- Asthma
- Bronchitis
- Chronic obstructive pulmonary disease (COPD)
- Emphysema
- Determine the cause of lung-related symptoms
- Pulmonary fibrosis
The airflow in and out of the lungs is measured by breathing into an instrument called a spirometer. The spirometer measures the amount and rate of air inhaled and exhaled. These measurements are recorded under various conditions in order to detect lung abnormalities.