What Is The Lung Function Test?
Lung Function test (LFT) is a non-invasive procedure to show how well the lungs are working. The test measures 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.

The Lung Function test is done in 2 steps:
Spirometry: The test requires taking in a very deep breath and blowing out as fast as possible into a small device called a spirometer.

Gas Transfer Test:
You will be asked to breathe normally into a mouthpiece, followed by a relaxed blow all the way out until you cannot breathe out any more air, and then asked in breathe in as deep and quickly as possible and hold your breath for approx. 10 sec and relax and blow all the way out. You may take a deep breath afterwards.