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?

A. While monitoring the client’s cardiac status is important due to the risk of arrhythmias with hyperkalemia, obtaining a daily ECG is not the most immediate or frequent evaluation required. Continuous cardiac monitoring is typically preferred in such cases. B. Monitor and document strict intake and output: While important for overall fluid balance, this option does not specifically address the potential cardiac complications associated with hyperkalemia and insulin administration. C. The prescribed treatment involves insulin, which facilitates the movement of potassium into cells, thereby reducing serum potassium levels. Monitoring potassium frequently is essential to evaluate the treatment’s effectiveness and to prevent hypokalemia, which can lead to complications such as arrhythmias or muscle weakness. D. Evaluate glucose levels before and after meals: Monitoring glucose levels is important for diabetes management but does not address the immediate cardiac risks associated with hyperkalemia and insulin administration.