Pulmonary function tests (PFTs) are a group of tests that measure how well your lungs work. This includes how well you’re able to breathe and how effective your lungs are able to bring oxygen to the rest of your body. It is a useful test to detect Asthma , COPD, ILD and other lung disorders.
Your doctor may order these tests:
- If you’re having symptoms of lung problems
- as part of a routine physical examination
- To monitor how effective your treatment is if you have a lung disease, such as asthma
- To assess how well your lungs are working before you have surgery .This test can be performed on the OPD basis.
It’s important that you don’t eat a large meal before testing. A full stomach can prevent your lungs from inhaling fully.
For this test, you’ll sit in front of a machine and be fitted with a mouthpiece. It’s important that the mouthpiece fits snugly so that all the air you breathe goes into the machine. You’ll also wear a nose clip to keep you from breathing air out through your nose
The respiratory technologist will explain how to breathe for the test
PFTs are usually safe for most people. However, because the test may require you to breathe in and out quickly, you may feel dizzy and there’s a risk that you might faint
If you feel lightheaded, tell your doctor. The test may cause you to have an asthma attack if you have asthma.