After several days, his oxygenation improved, the tube was removed, and he was able to be discharged to a nursing home. The ability to blow out only 0.9 L on maximal exertion indicates severe airflow obstruction and trapping of air in the lungs. The low blood oxygen tension indicates that the lungs have failed to provide normal gas exchange indicating alveolar disease. He smoked 1 pack a day for 50 years. Emphysema is a chronic, gradually progressive disease that limits activity and makes the person susceptible to infections.
Symptoms begin years after a person begins to smoke.
Treatment options are limited.