Pulmonary function tests (PFTs) measure the strength and efficiency of the lungs, as well as the quality of the air that flows through the respiratory system. These tests are very important for people who have trouble breathing, asthma, or feel out of breath.

Since a full PFT routine includes tests from different departments, such as an X-ray of the chest, a blood gas analysis, a breathing test, and more, Patients have to do a few simple things to make it easier to finish the test.