A 56-year-old woman with chronic kidney disease Stage 4 presents with diffuse muscle weakness and palpitations. Vital signs: BP 158/92, HR 104, RR 18, SpO2 98% on room air. ECG shows peaked T waves and prolonged PR interval. Serum potassium is 6.8 mEq/L, bicarbonate 19 mEq/L, creatinine 3.2 mg/dL. Urine output remains normal. She receives intravenous calcium gluconate. Which of the following best describes the primary purpose of this treatment?

1. A)Enhance urinary potassium excretion
2. B)Shift potassium into cells
3. C)Remove potassium through the gastrointestinal tract
4. D)Stabilize the cardiac membraneGABARITO
5. E)Correct the metabolic acidosis directly