Emphysema due to common diseases

Emphysema due to common diseases

Emphysema to a high incidence of the elderly, the United States about 10 million patients, of which 7.5 million people with chronic bronchitis, emphysema about 250 million people, its incidence increases with age. China's patients over the age of 50, the prevalence rate of 13%. Chronic pulmonary heart disease patients, over 90 per cent from chronic bronchitis, emphysema developed.

The incidence of emphysema reasons not yet fully explained, is generally believed that a combination of factors is the formation of synergies. Such as infection, smoking, air pollution, occupational dust and the long-term inhalation of harmful gases, such as allergies can cause obstructive pulmonary emphysema. Foreign scholars through the whole lung biopsy observed that the incidence of emphysema smokers than non-smokers increased significantly, more than 20 daily smoking, emphysema rate was 51.9 percent, the daily smoking less than 20 Support, 38.8%, instead of only 2.9 percent of smokers. Zhiyan of tar can cause bronchial epithelial cell growth and variation, hydrogen cyanide acid damage bronchial epithelial cells and cilia, nicotine can affect autonomic, for the occurrence of emphysema has created conditions.