What is COPD-Emphysema

Chronic obstructive pulmonary disease (COPD) is an umbrella term for a group of respiratory tract diseases that are characterized by airflow obstruction or limitation. It is usuall...

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COPD & Emphysema Information

Chronic obstructive pulmonary disease (COPD) is an umbrella term for a group of respiratory tract diseases that are characterized by airflow obstruction or limitation. It is usually caused by tobacco smoking but can also be caused by coal dust. COPD is also known as CORD, COAD, COLD which respectively stand for chronic obstructive respiratory, airways, or lung disease. COPD has been referred to as CAL which stands for chronic airway limitation.

COPD is a progressive disease. Obstructive changes in spirometry and decreases in diffusion capacity are typically seen before symptoms occur. Early signs and symptoms are shortness of breath on exertion, recurrent respiratory infections or a morning cough. As the disease continues, the symptoms are seen with increased frequency and severity. In the late stages, the patient often experiences severe cough, constant wheezing, and shortness of breath with minimal exertion or rest. At this late stage, progression to respiratory failure and death is common. Progression is typically caused by the patient's continued exposure to tobacco smoke. Although medications often decrease symptoms, it is not believed that they prevent the progression if the patient continues to smoke.

Emphysema is a chronic lung disease. It is often caused by exposure to toxic chemicals or long-term exposure to tobacco smoke.

Emphysema is characterised by loss of elasticity of the lung tissue; destruction of structures supporting the alveoli; and destruction of capillaries feeding the alveoli. The result is that the small airways collapse during expiration, leading to an obstructive form of lung disease (air is trapped in the lungs in obstructive lung diseases). Symptoms are: shortness of breath on exertion--particularly when climbing stairs or inclines (and later at rest), hyperventilation and an expanded chest. As emphysema progresses, clubbing of the fingers may be observed, a feature of longstanding hypoxia.

Emphysema patients are sometimes referred to as "pink puffers". This is because emphysema sufferers may hyperventilate to maintain adequate blood oxygen levels. Hyperventilation explains why emphysema patients do not appear cyanotic as chronic bronchitis (another COPD disorder) sufferers often do; hence they are "pink" puffers (adequate oxygen levels in the blood) and not "blue" bloaters (cyanosis; inadequate oxygen in the blood).

Emphysema is an irreversible degenerative condition. The most important measure that can be taken to slow the progression of emphysema is for the patient to stop smoking and avoid all exposure to cigarette smoke and lung irritants. Pulmonary rehabilitation can be very helpful to optimize the patients quality of life and teach the patient how to actively manage his or her care. It is treated by supporting the breathing with anticholinergics, bronchodilators and (inhaled or oral) steroid medication, and supplemental oxygen as required. Treating patient's other conditions including gastric reflux and allergies may also help the patient's lung function. Supplemental oxygen used as prescribed (20+ hours/day) is the only non-surgical treatment which has been shown to prolong life in emphysema patients. Other medications are being researched. There are lightweight portable oxygen systems which allow patients increasing mobility. Patients fly, cruise, and work while using supplemental oxygen.

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