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MediumNephrologyChronic kidney disease stage 4au-racpau-amc

A 68-year-old man with chronic kidney disease (eGFR 28 mL/min/1.73 m²) presents with bilateral ankle oedema and mild breathlessness. His potassium is 5.7 mmol/L and bicarbonate 18 mmol/L. What is the MOST appropriate next step in management?

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