COPD is commonly misdiagnosed — former smokers are often told they have COPD when in reality they have simple deconditioning or another less common lung condition. Likewise, many people who truly do have COPD aren't diagnosed until the disease is far advanced and interventions are less effective.
If you have symptoms of COPD and a history of exposure to lung irritants — especially cigarette smoke — your doctor may recommend these tests:
July 21, 2015
- Pulmonary function tests. Spirometry is the most common lung function test. During this test, you'll be asked to blow into a large tube connected to a spirometer. This machine measures how much air your lungs can hold and how fast you can blow the air out of your lungs. Spirometry can detect COPD even before you have symptoms of the disease. It can also be used to track the progression of disease and to monitor how well treatment is working. Spirometry often includes measurement of the effect of bronchodilator administration. Other lung function tests include measurement of lung volumes, diffusing capacity and pulse oximetry.
- Chest X-ray. A chest X-ray can show emphysema, one of the main causes of COPD. An X-ray can also rule out other lung problems or heart failure.
- CT scan. A CT scan of your lungs can help detect emphysema and help determine if you might benefit from surgery for COPD. CT scans can also be used to screen for lung cancer, which is more common among people with COPD than it is among those who smoked but didn't develop COPD.
- Arterial blood gas analysis. This blood test measures how well your lungs are bringing oxygen into your blood and removing carbon dioxide.
- Balkissoon R, et al. Chronic obstructive pulmonary disease: A concise review. Medical Clinics of North America. 2011;95:1125.
- Longo DL, et al. Chronic obstructive pulmonary disease (COPD). Harrison's Online. 18th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com. Accessed June 3, 2015.
- What is COPD? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/copd/. Accessed June 3, 2015.
- Standards for the diagnosis and management of patients with COPD. American Thoracic Society. http://www.thoracic.org/clinical/copd-guidelines/index.php. Accessed June 4, 2015.
- Hanley ME, et al. Chronic obstructive pulmonary disease. In: Current Diagnosis & Treatment in Pulmonary Medicine. New York, N.Y.: The McGraw-Hill Companies; 2003. http://accessmedicine.mhmedical.com/content.aspx?bookid=346§ionid=39883254. Accessed June 4, 2015.
- Foreman MG. Genes and chronic obstructive pulmonary disease. Medical Clinics of North America. 2012;96:699.
- Rosenberg SR, et al. An integrated approach to the medical treatment of chronic obstructive pulmonary disease. Medical Clinics of North America. 2012;96:811.
- AskMayoExpert. Chronic pulmonary obstructive disease. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2015.
- Scanlon PD (expert opinion). Mayo Clinic, Rochester, Minn. June 4, 2015.