us-usmle-step-2 MCQ (SBA): COPD Long-term Oxygen

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ModerateRespiratory MedicineCOPD Long-term Oxygenus-usmle-step-2us-usmle-step-3us-abfm

A 72-year-old with COPD, resting SpO₂ 86% on room air, has no hypercapnia. What long-term therapy improves survival?

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us-usmle-step-2 MCQ: COPD Long-term Oxygen — Answer & Explanation | ia