The healthcare provider prescribes a 5% dextrose injection with 20 units of regular insulin for a client with a serum potassium level of 6.0 mEq/L (6.0 mmol/L) and glucose level of 180 mg/dL (10.0 mmol/L). Which evaluation is most important for the nurse to include in this client's plan of care? Reference Range: Potassium [3.5 to 5.0 mEq/L (3.5 to 5.0 mmol/L)] Glucose [74 to 106 mg/dL (4.1 to 5.9 mmol/L)]

A. Monitor and document strict intake and output: While monitoring intake and output is important in managing fluid balance, it may not directly address the potential complications associated with hyperkalemia and hyperglycemia. B. Assess the serum potassium level every 4 hours: While monitoring potassium levels is important, obtaining a 12-lead electrocardiogram provides immediate information about the cardiac effects of hyperkalemia, which can be life-threatening. C. Obtain a 12-lead electrocardiogram daily: Hyperkalemia can lead to serious cardiac arrhythmias, including bradycardia, heart block, and ventricular fibrillation. Daily electrocardiograms can help detect these changes early. D. Evaluate glucose levels before and after meals: While monitoring glucose levels is important, the immediate concern in this scenario is the potential cardiac effects of hyperkalemia.