Diffusion Capacity (DLCO) is a lung function test that measures how well oxygen passes from your lungs into your blood. During the test, you breathe in a small amount of special gas and then breathe it out — the machine measures how much gas your lungs absorbed.
This test helps doctors check how efficiently your lungs are working and can detect conditions like emphysema, pulmonary fibrosis, or other lung diseases.
It’s a quick, safe, and painless test that gives valuable information about your lung health and helps your doctor plan the best care for you.