What is permanent obstructive disorder resulting from chronic bronchitis?

The permanent obstructive disorder resulting from chronic bronchitis is Chronic Obstructive Pulmonary Disease (COPD). COPD is a progressive, life-threatening lung disease that causes airflow blockages and breathing difficulties. It is the third leading cause of death worldwide and the leading cause of preventable death in the United States. In addition to chronic bronchitis, COPD is also characterized by emphysema, a condition in which the alveoli in the lungs are damaged, leading to overinflation of the lungs.