For clinical reference only — does not replace local trust guidelines or clinical judgement.
‹ Blood Results
Blood Results

Hyperkalaemia

Hyperkalaemia

Severity
Range
  • Mild
    K 5.5–5.9
  • Moderate
    K 6.0–6.4
  • Severe
    K ≥ 6.5 or ECG changes
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Renal Causes

AKICKD / missed dialysisRenal tubular acidosis type 4
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Endocrine Causes

Addisonian crisisHypoaldosteronism
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Drug-related Causes

ACEi / ARBSpironolactone / amilorideTrimethoprimNSAIDsK+ supplementsHeparin
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Cellular shift Causes

Acidosis (DKA)RhabdomyolysisTumour lysisMassive haemolysisBurns
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Spurious Causes

Haemolysed sampleTourniquet too tightDelayed processingThrombocytosis