us-abfm MCQ (SBA): COPD (Chronic Hypoxemia)

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EasyRespiratory MedicineCOPD (Chronic Hypoxemia)us-abfmus-abimus-usmle-step-2

A 72-year-old with COPD (SaO2 86% at rest on room air, confirmed twice) asks about oxygen. Which is indicated?

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us-abfm MCQ: COPD (Chronic Hypoxemia) — Answer & Explanation | iatroX