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EasyRespiratoryCOPD exacerbationuk-plab-1

A 68-year-old man with severe COPD (FEV1 40% predicted) presents with increased breathlessness and a productive cough. On arrival his oxygen saturation is 84% on air and he is drowsy. An arterial blood gas confirms hypercapnia. What target oxygen saturation range should be used when administering controlled oxygen therapy?

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