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HardRespiratory MedicineCOPD Exacerbation-NIVus-abemus-abimus-usmle-step-2

A 65-year-old man presents with acute dyspnea and wheeze; known COPD. ABG shows pH 7.28, PaCO₂ 62 mm Hg, PaO₂ 60 on supplemental oxygen. Best immediate intervention?

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