To diagnose COPD, your doctor will probably do the following tests:
Medical history and physical exam. These will give your doctor important information about your health.
Lung function testsLung function tests, including an FEV1 test. These tests measure the amount of air in your lungs and the speed at which air moves in and out. Spirometry is the most important of these tests.
Chest X-rayChest X-ray. This helps rule out other conditions with similar symptoms, such as lung cancer.