Hyperkalemia: Stabilize, Shift, Remove, Recheck

Accumulation and redistribution

Potassium rises when excretion is impaired, cells release potassium, or potassium shifts out of cells. CKD, AKI, medications, tissue breakdown, and acid–base disturbances can combine; sample artifact can also mimic disease.

Recognize immediate danger

Assess symptoms, ECG, kidney function, potassium trend, and clinical context promptly. A reassuring ECG does not exclude serious risk. Repeat a suspicious sample when appropriate without delaying treatment of convincing life-threatening hyperkalemia.

Stabilize and shift when indicated

Intravenous calcium protects the myocardium when indicated but does not lower potassium. Insulin with glucose and selected adjuncts temporarily move potassium into cells; anticipate hypoglycemia and monitor the treatment response.

Remove potassium from the body

Address causative medications and consider urinary elimination, gastrointestinal binders, or dialysis according to severity and kidney function. Oral binders do not substitute for immediate stabilization and shifting in an emergency.

Apply the concept: advanced CKD emergency

The advanced-CKD scenario integrates ECG changes, medication exposure, and reduced kidney excretion. Learners should distinguish temporary redistribution from definitive removal, recognize when dialysis is necessary, and arrange repeat potassium and glucose measurements.

Prevent recurrence without shortcuts

Evaluate urinary obstruction when plausible and catheterize for a clinical indication, not automatically before urgent therapy. Reassess diet and medications, and preserve beneficial RAAS therapy when safe with an individualized follow-up plan.

Self-check: Which intervention protects the myocardium, which shifts potassium, and which removes it? Explain why improvement after shifting still needs repeat monitoring.