Most people with COPD have a combination of both chronic bronchitis and emphysema.
Research shows that pipe and cigar smoke are safe for the lungs.
Severity of COPD is assessed through a pulmonary function test.
Chronic hypercapneic respiratory failure is characterized by the destruction of capillaries and alveoli in the lungs.
Fatigue results more quickly in COPD patients.
End-stage COPD is defined as when airflow in the lungs is below 15 percent of normal.