Stage 2 COPD is characterized by a pulmonary function test that is 50 to 80 percent of the expected response, according to Healthline. Additionally, people with stage 2 COPD may have moderate-to-severe shortness of breat... More »

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Chronic Obstructive Pulmonary Disease, or COPD, is diagnosed and treated according to the GOLD guidelines. The GOLD staging system is based on pulmonary function tests, first measuring the volume of air in a one-second f... More »

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Chronic obstructive pulmonary disease shortens life expectancy, but it is difficult to predict precisely how long an individual can live with the disease, according to Healthline. Factors that influence life expectancy i... More »

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The two best breathing techniques for COPD patients are pursed-lip breathing and diaphragmatic breathing, says Healthline. These exercises correct the use of breathing muscles as well as strengthen them. More »

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The earliest sign of COPD for most people is a chronic cough, according to Healthline. A cough is chronic if it persists for three months or longer out of any one year for two years. More »

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A normal oxygen level for a patient suffering from COPD is between 95 and 100 percent, according to About.com. Although some people are able to function normally with an oxygen level as low as 90 percent, a doctor should... More »

COPD, also called chronic obstructive pulmonary, is not reversible, according to the National Heart, Lung and Blood Institute. However, it is treatable and people can live with it for a long time. More »

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