The emergency nurse reviews findings for a client with acute kidney injury. Which findings require immediate follow-up for possible dangerous hyperkalemia? Highlight the findings that support this electrolyte emergency.
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Choose your responses, then check the answer.
Explanation
A potassium of 6.8 mmol/L, peaked T waves with QRS widening, ascending weakness, and symptomatic bradycardia support dangerous hyperkalemia. Stable findings do not show the same immediate conduction risk.
Quick answer Highlight the nonhemolyzed potassium of 6.8 mmol/L, new peaked T waves with QRS widening, weakness progressing toward the trunk, and symptomatic bradycardia. Together they show severe biochemical, cardiac, and neuromuscular effects of hyperkalemia.
Why this is correct Hyperkalemia can disrupt cardiac conduction and cause progressive muscle weakness. Peaked T waves, QRS widening, and symptomatic bradycardia are dangerous manifestations, while a normal-looking ECG cannot reliably exclude risk after a confirmed high potassium result.[2]
Easy analogy or mental picture Think of potassium as the electrical setting for muscles and the heart. When the setting rises too high, the wiring begins to distort and the motor weakens. This picture explains urgency but does not replace repeat testing when a specimen may be hemolyzed.
Memory hook High potassium, changing ECG, rising weakness: protect the heart first.
NCLEX decision rule When acute kidney injury and a confirmed markedly elevated potassium appear with conduction changes or progressive weakness, treat the pattern as immediately dangerous. Do not wait for every classic ECG change, because severe hyperkalemia may have an initially nondiagnostic tracing.
Why the other choices are wrong A normal sodium level, unchanged temperature, clear lungs, stable oxygen saturation, a patent intravenous line, and a previously normal potassium do not explain the current electrical and neuromuscular deterioration. They may remain relevant to care but are not the target emergency cues.
References
[1]
NCSBN: 2026 NCLEX-RN Test PlanNational Council of State Boards of Nursing
[2]
KDIGO: Acute Hyperkalemia in the Emergency DepartmentKidney Disease: Improving Global Outcomes