Alayne Ronnenberg, ScD
COPD cannot be detected before irreversible lung damage has occurred. But, the earlier it is detected, the sooner steps can be taken to modify further damage. Your doctor will ask you about your symptoms and medical history. A physical exam will be done. Your history and physical exam provide the most important information that is used for the diagnosis of COPD.
If your doctor suspects you might have COPD, you may have one or more of the following tests:
Many tests of lung function have been developed. Each provides slightly different information about how well your lungs are working.
Pulmonary function tests
are painless and noninvasive. They are performed using a machine called a spirometer. By breathing into the spirometer, your doctor can measure your lung volume and your ability to move air in and out of your lungs in a certain period of time. Your results are compared with typical findings of a healthy person your age and height. Your doctor can then determine to what extent your lung function is diminished. Sometimes, tests are repeated after you have been given a bronchodilator medication. This is to see if your results improve with this type of treatment.
Pulmonary function measures include:
This test measures how well your lungs transfer a small amount of carbon monoxide gas into your blood. You take a breath of air containing a very small amount of carbon monoxide from a container. The amount of carbon monoxide in your exhaled air or arterial blood is then measured.
A sensor on your finger is used. It can quickly get basic information about the amount of oxygen in your blood.
Imaging tests are used to examine the lungs and evaluate lung damage. These may include:
About COPD. American Lung Association website. Available at:
http://www.lung.org/lung-disease/copd/about-copd. Accessed February 24, 2014.
COPD. EBSCO DynaMed website. Available at:
http://www.ebscohost.com/dynamed. Updated February 20, 2014. Accessed February 24, 2014.
What is COPD? National Heart, Lung, and Blood Institute (NHLBI) website. Available at:
http://www.nhlbi.nih.gov/health/health-topics/topics/copd. Updated July 31, 2013. Accessed February 24, 2014.
What you can do about a lung disease called COPD. Global Initiative for Chronic Obstructive Lung Disease website. Available at:
http://www.goldcopd.org/uploads/users/files/GOLD_Patient_RevJan10.pdf. Accessed February 24, 2014.
Last reviewed February 2014 by Peter J. Lucas, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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