us-abfm MCQ (SBA): COPD (LTOT Indications)

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ModerateRespiratory MedicineCOPD (LTOT Indications)us-abfmus-abimus-usmle-step-2

A 62-year-old man with severe COPD asks about long-term oxygen. Resting PaO₂ is 52 mm Hg on room air; SaO₂ 85%. What is the correct indication?

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us-abfm MCQ: COPD (LTOT Indications) — Answer & Explanation | iatroX