Treatment of Moderate to Severe Hyperkalemia When Initial Medical Therapy Has Failed

This protocol applies when initial medical management of moderate to severe hyperkalemia — across cardiac stabilisation, intracellular potassium-shifting, and potassium-binding — has not achieved adequate serum potassium reduction within the expected timeframe, requiring urgent escalation.

Failure Condition — Prior Line Did Not Meet Target

Prior therapy insufficient

First-line treatment comprising cardiac membrane stabilisation with IV calcium, potassium-shifting with insulin-glucose (and nebulised salbutamol as adjuvant), and potassium removal with Sodium Zirconium Cyclosilicate or Patiromer did not achieve serum K⁺ below 6.0 mmol/L within 2 hours of initiation.

This protocol is the defined next step following that failure.

Escalation Approach

Urgent initiation of renal replacement therapy is the intervention at this stage. The decision on timing, suitability, and modality requires specialist assessment — by a nephrologist or critical care specialist — based on the individual clinical picture.

The complete structured protocol — including specific modality options, clinical criteria, and decision guidance — is available via the link below.

Instant Access to Structured Evidence-Based Regimens

References

We recommend that the decision on timing, suitability and modality for initiation of RRT in patients with life-threatening hyperkalaemia, either from the outset or resistant to initial medical therapy, is taken urgently by a nephrologist or critical care specialist.

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