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Emphysema Causes and Risks: Cigarette smoking is the major cause of emphysema. Tobacco smoke and other pollutants are thought to cause the release of chemicals within the air sacs of the lung that damage the walls of the air sacs. The damage becomes worse over time, affecting the exchange of oxygen and carbon dioxide in the lungs. A substance called alpha-1 antitrypsin may protect against the damage. People with alpha-1 antitrypsin deficiency are at a higher risk for severe disease. The incidence is 2 out of 1,000 people. Emphysema in children is caused by congenital abnormalities of the lung and alpha-1 antitrypsin deficiency. Prevention: Avoiding exposure to tobacco smoke and other pollutants will decrease the risk of the disease. Symptoms: Additional symptoms that may be associated with this disease: Signs and Tests: A physical examination shows decreased breath sounds , wheezing , abnormal breath sounds ( rales ), and prolonged exhalation (exhalation takes more than twice as long as inspiration). The chest may appear enlarged on the right side, or there may be an increased front-to-back diameter of the chest (barrel shaped chest). There may be signs of chronic sleep deprivation, or signs of chronically insufficient oxygen levels in the blood. These tests help confirm the diagnosis: This disease may also alter the results of the following tests: Treatment: Medications used to improve breathing include bronchodilators (hand-held inhaler or nebulizer), diuretics, and corticosteroids. Antibiotics are prescribed when respiratory infections occur. Influenza ( flu ) vaccines and Pneumovax are recommended for people with this diagnosis. Thinning and removal of lung secretions can be enhanced by an adequate fluid intake and chest physical therapy (postural drainage and chest clapping). Many people use low-flow oxygen at home. Avoidance of air pollution and smoking is important. EXPERIMENTAL THERAPY: An experimental surgery, called lung reduction, is currently being used to treat some patients with severe emphysema. Lung reduction surgery removes the damaged portions of the lung, thus allowing the normal portions of the lung to expand more fully and take advantage of increased areation. Prognosis: The outcome is usually better for those who quit smoking early. The outcome is likely to be poor for those who have extensive lung damage; death occurs from respiratory failure or heart failure . Complications: Call Your Healthcare Provider: Call for an appointment with your health care provider if symptoms of emphysema develop. If you have emphysema, call your health care provider if breathing difficulty is increased or other new symptoms develop. This is an illustration of the major features of the lungs and bronchial tree. The inset is of the alveoli. They are the microscopic blood vessel-lined sacks in which oxygen and carbon dioxide gas are exchanged. Spirometry is a painless study of air volume and flow rate within the lungs. Spirometry is frequently used to evaluate lung function in people with obstructive or restrictive lung diseases (such as asthma or cystic fibrosis). Clubbing results from chronic low blood-oxygen levels. This can be seen with cystic fibrosis, congenital cyanotic heart disease, and several other diseases. The tips of the fingers enlarge and the nails become extremely curved from front to back.
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