Which therapy is the only medical therapy shown to decrease mortality in chronic bronchitis?

Which therapy is the only medical therapy shown to decrease mortality in chronic bronchitis?

• A. Inhaled steroids
• B. PDE-4 inhibitors
• C. Oxygen
• D. Antibiotics alone

Answer: (C)

Long-term supplemental oxygen improves survival for patients with chronic bronchitis who have chronic hypoxemia. Correcting low oxygen levels reduces complications driven by hypoxemia, such as pulmonary hypertension, right heart failure, and secondary polycythemia, all of which contribute to mortality in COPD. Landmark randomized trials demonstrated that continuous home oxygen therapy prolongs survival in hypoxemic COPD patients, with commonly used criteria including resting oxygen saturation at or below 88% (or a PaO2 of 55 mmHg or less; some benefit has been noted for PaO2 56–59 mmHg if there is signs of cardiac strain or polycythemia). Other medical therapies—while helpful for symptoms, inflammation, or exacerbation prevention—have not shown a proven mortality benefit in chronic bronchitis when used alone, making oxygen the only option with demonstrated impact on survival.

Long-term supplemental oxygen improves survival for patients with chronic bronchitis who have chronic hypoxemia. Correcting low oxygen levels reduces complications driven by hypoxemia, such as pulmonary hypertension, right heart failure, and secondary polycythemia, all of which contribute to mortality in COPD. Landmark randomized trials demonstrated that continuous home oxygen therapy prolongs survival in hypoxemic COPD patients, with commonly used criteria including resting oxygen saturation at or below 88% (or a PaO2 of 55 mmHg or less; some benefit has been noted for PaO2 56–59 mmHg if there is signs of cardiac strain or polycythemia). Other medical therapies—while helpful for symptoms, inflammation, or exacerbation prevention—have not shown a proven mortality benefit in chronic bronchitis when used alone, making oxygen the only option with demonstrated impact on survival.