What are lung function test (PFT)?
There are a variety of lung function tests available which examine different aspects which can be broadly divided into airflow, lung size and gas exchange. Lung function tests are used to help diagnose certain lung conditions, and to monitor response to treatment. Depending on the problem, certain tests may be used, as not all tests examine all aspects. • Peak flow meter This device is a cylindrical tube into which one has to blow out as hard and as fast as possible. It only measures how fast the air can be blown out. This test is most useful in asthma and smoking related lung disease (COPD) as in these conditions the airflow is usually reduced proportionally to the severity of the disease. • Spirometry This test is often done as a screening test for lung disease prior to any major surgical operation. It requires one to blow out as hard as possible until your lungs are completely empty. It measures the volume of air blown out in 1 second (FEV 1) and the total volume blown out (FVC). Th
