Chronic Obstructive Pulmonary Disease

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What is COPD? Chronic obstructive pulmonary disease (COPD) is comprised primarily of three related conditions - chronic bronchitis, chronic asthma, and emphysema. In each condition there is chronic obstruction of the flow of air through the airways and out of the lungs, and the obstruction generally is permanent and may be progressive over time. While asthma features obstruction to the flow of air out of the lungs, usually, the obstruction is reversible. Between "attacks" of asthma the flow of air through the airways typically is normal. These patients do not have COPD. However, if asthma is left untreated, the chronic inflammation associated with this disease can cause the airway obstruction to become fixed. That is, between attacks, the…show more content…
The destruction of the alveolar walls reduces the elasticity of the lung overall. Loss of elasticity leads to the collapse of the bronchioles obstructing airflow out of the alveoli. Air becomes "trapped" in the alveoli and reduces the ability of the lung to shrink during exhalation. This trapped air takes up space and results in a reduced amount of air that can be taken in during the next breath. As a result, less air gets to the alveoli for the exchange of gasses. This trapped air also can compress adjacent less damaged lung tissue, preventing it from functioning to its fullest…show more content…
Emphysema symptoms of COPD * In patients affected predominantly by emphysema, shortness of breath may be the major symptom. Dyspnea usually is most noticeable during increased physical activity, but as emphysema progresses, dyspnea occurs at rest. Chronic bronchitis and bronchiectasis symptoms of COPD * In patients with chronic bronchitis as well as bronchiectasis, chronic cough and sputum production are the major symptoms. The sputum is usually clear and thick. Periodic chest infections can cause fever, dyspnea, coughing, production of purulent (cloudy and discolored) sputum and wheezing. (Wheezing is a high pitched noise produced in the lungs during exhalation when mucous, bronchospasm, or loss of lung elasticity obstructs airways.) Infections occur more frequently as bronchitis and bronchiectasis progress. Advanced COPD symptoms * In advanced COPD, patients may develop cyanosis (bluish discoloration of the lips and nail beds) due to a lack of oxygen in blood. * They also may develop morning headaches due to an inability to remove carbon dioxide from the

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