Visual summary
For dialysis patients, review attendance, access delivery, diet, constipation, medications, and the long interdialytic interval rather than only changing one bath value.
Text version
Danger depends on context
Potassium can rise through reduced excretion, cell shifts, tissue breakdown, and medications. The pace of change and underlying physiology affect risk.
Confirm without delaying care
Consider sample artifact when findings are unexpected, but do not postpone treatment for a clinically unstable patient with a credible dangerous result.
Assess electrical and systemic effects
Obtain an ECG and evaluate symptoms, kidney function, acid–base status, glucose, and ongoing potassium release. A normal ECG does not exclude serious risk.
Protect, shift, then remove
IV calcium stabilizes cardiac membranes when indicated; it does not lower potassium. Insulin with glucose and an inhaled beta-agonist can shift potassium temporarily. Removal requires urinary excretion when feasible, a potassium binder in an appropriate setting, or dialysis. Arrange definitive removal while temporary measures act.
Watch for rebound and hypoglycemia
Repeat potassium after temporizing therapy and continue surveillance when release or impaired excretion persists. Insulin-related hypoglycemia can occur after the initial glucose has fallen, particularly in kidney failure; follow a scheduled glucose-monitoring protocol. A transient potassium decrease does not prove the total-body excess has been removed.
Address the longer interval
For dialysis patients, review attendance, access delivery, diet, constipation, medications, and the long interdialytic interval rather than only changing one bath value.