Chronic obstructive pulmonary disease (COPD) is a chronic pulmonary disease that is characterized by obstruction, progressive respiratory tract to the face, is irreversible. Obstruction, airway stenosis, published in all the ways of air that resist the passage of air raises. COPD has three sub-sets. emphysema, bronchitis, chronic disease and air ducts (SAD). This disease, with a steady decline respiratory function during periods of exacerbation, is associated with. This disease is the fourth leading cause of death in America. Chronic bronchitis defined clinically, and means there is cough, sputum, to three months in the year, and for at least two consecutive years. Emphysema definition of pathological is to mean the destruction of the alveoli and ducts of air is small. SAD to shortness of small applied this patients cough but phlegm.