us-abfm MCQ (SBA): COPD-Long‑term Oxygen Therapy

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EasyRespiratory MedicineCOPD-Long‑term Oxygen Therapyus-abfmus-abimus-usmle-step-2

A 68-year-old with COPD on room air has resting SpO₂ 86% confirmed on ABG with PaO₂ 54 mm Hg. What long‑term therapy improves survival?

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us-abfm MCQ: COPD-Long‑term Oxygen Therapy — Answer & Explanation | ia