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EasyRespiratoryAcute exacerbation of COPDuk-plab-1

A 70-year-old man with severe chronic obstructive pulmonary disease (COPD) presents with a 2-day history of increasing breathlessness and productive cough. His arterial blood gases on air show: pH 7.32, PaCO2 8.0 kPa, PaO2 7.0 kPa, HCO3− 30 mmol/L. What target oxygen saturation range is most appropriate for his acute management?

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