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Chronic bronchitis in the elderly

Chronic bronchitis is a chronic nonspecific inflammation of tracheobronchial mucosa and its surrounding tissues caused by infectious or non infectious factors. Its pathological features are bronchial mucinous gland hyperplasia and increased mucus secretion. The clinical manifestation is cough, expectoration or asthma for more than 2 consecutive years and more than 3 months every year. The onset of the disease is insidious, and the early symptoms are mild. Most of them occur in winter and alleviate after spring warming; Later symptoms worsen and exist all year round. The course of disease is prolonged and repeated, often complicated with emphysema and pulmonary heart disease.


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