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Diagnosis of Chronic Obstructive Pulmonary Disease (COPD)

Pulmonary (Lung) Function Tests(CT) Scan

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. When you first see your doctor, he or she will ask 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.



Pulmonary function measures include:




Forced Expiratory Volume in 1 Second (FEV1)—This measures the volume of air that can be forcibly exhaled in one second. It represents the rate of air movement out of the lungs. FEV1 typically declines a very small amount per year in normal persons. But, the decline can be several times greater in people with COPD.


A sensor on your finger is used. It can quickly get basic information about the amount of oxygen in your blood. More detailed measurements are provided by a blood test called an arterial blood gas.

Arterial blood gases determine the amount of oxygen and carbon dioxide in your bloodstream. This test requires that a blood sample be removed from one of your arteries. It is usually removed from your wrist, but sometimes your groin. It is done more often in an emergency room or hospital setting for someone who appears more seriously ill.

A chest x-ray provides a picture of the heart, lungs, and bones. It also shows soft tissues in the chest, as well as the blood vessels associated with them.

This test provides a detailed x-ray of the lungs. It can be useful in assessing the extent of lung damage associated with COPD.


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