Treatment of Severe Hyperkalemia in Patients on Maintenance Haemodialysis
When a patient already established on maintenance haemodialysis presents with a serum potassium of 6.5 mmol/L or above, this constitutes a medical emergency requiring an urgent, structured response. The underlying dependence on renal replacement therapy shapes both the immediate priorities and the longer-term approach.
Clinical scenario: A patient on maintenance haemodialysis with confirmed severe hyperkalaemia — serum K+ ≥ 6.5 mmol/L. The inter-dialytic interval and the risk of life-threatening cardiac conduction disturbances make timely, protocol-driven management essential.
Management approach
Urgent renal replacement therapy is central to management. Whether additional acute interventions are needed alongside it — and what form those take — depends on the patient's ECG findings and how quickly dialysis can be initiated. The full protocol also addresses strategies for the inter-dialytic period. The complete regimen, including the decision framework and sequencing, is available below.
References
- We recommend that haemodialysis patients with severe hyperkalaemia (serum K+ ≥ 6.5 mmol/L) receive dialysis treatment urgently.
- We recommend that haemodialysis patients with severe hyperkalaemia (serum K+ ≥ 6.5 mmol/L) and toxic ECG changes be treated with intravenous calcium salt to reduce risk of arrhythmias even when dialysis is immediately available.
- We recommend that haemodialysis patients with severe hyperkalaemia (serum K+ ≥ 6.5 mmol/L) be treated with standard medical therapies to lower serum potassium if dialysis is not immediately available.
- We suggest that potassium binders may be considered to reduce the risk of hyperkalaemia during the inter-dialytic period.
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