Chronic Obstructive Pulmonary Disease

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Chronic Obstructive Pulmonary Disease, or COPD is an umbrella term used to describe a combination of lung diseases. COPD (in the US) most commonly includes two main diseases, Emphysema and Chronic Bronchitis. COPD is a progressive disease that becomes worse over time. There is no known cure for COPD, but treatments are available to maintain quality of life. Chronic Obstructive Pulmonary Disease causes coughing fits that produce large amounts of phlegm as the bronchioles become plugged up with mucus. “COPD is not simply a "smoker's cough" but an under-diagnosed, life-threatening lung disease.” (As stated by the WHO, World Health Organization). Chronic Obstructive Pulmonary Disease affects more than 60 million people worldwide. In 2005 alone, more than 3 million people died from COPD. (2005, WHO) Those most at risk are smokers, women, especially where biomass fuel is used in the home, miners, those with a history of asthma and individuals who are unemployed, lower income, divorced, separated or widowed. Two of the elements most widely interchanged with the term COPD are, Emphysema and chronic bronchitis. These are entirely different diseases with their own diagnosis. Though most health organizations categorize them as COPD or COPD related, some institutions do not.

Chronic Bronchitis is the inflammation and irritation of the lining of the airways (bronchial tubes and bronchioles). Irritation caused by Chronic Bronchitis results in overproduction of mucus, producing obstructions within the bronchi and bronchioles. Coughing up thick mucus is a common occurrence in individuals with chronic bronchitis. The phlegm produced will often be discolored, yellow or brownish, green or even clear, and usually be darker and thicker in the m...

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...telephone booth (body plethysmograph) while breathing in and out into a mouthpiece. Changes in pressure inside the box help determine the lung volume.
Lung volume can also be measured when you breathe nitrogen or helium gas through a tube for a certain period of time. The concentration of the gas in a chamber attached to the tube is measured to estimate the lung volume.
To measure diffusion capacity, you breathe a harmless gas, called a tracer gas, for a very short time, often for only one breath. The concentration of the gas in the air you breathe out is measured. The difference in the amount of gas inhaled and exhaled measures how effectively gas travels from the lungs into the blood. This test allows the doctor to estimate how well the lungs move oxygen from the air into the bloodstream.
 http://www.goldcopd.org/uploads/users/files/GOLD_Report_2011_Feb21.pdf

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