The healthcare provider prescribes 5% Dextrose Injection, USP 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 [Reference Range: 3.5 to 5.0 mEq/L (3.5 to 5.0 mmol/L)] Glucose [Reference Range: 0 to 50 years: 74 to 106 mg/dL (4.1 to 5.9 mmol/L)]