What monitoring is essential for a patient on a continuous insulin infusion?

• A. Frequent blood glucose checks and potassium monitoring; monitor for hypoglycemia and electrolyte shifts
• B. Lipid panel every six hours
• C. Serum calcium every shift
• D. Complete blood count daily

Answer: (A)

Close glucose and potassium monitoring is essential when a patient is on a continuous insulin infusion. Insulin therapy rapidly lowers blood glucose by promoting uptake into cells, so glucose values must be checked frequently to titrate the infusion and prevent hypoglycemia. At the same time, insulin drives potassium into cells, which can lead to hypokalemia and potentially dangerous arrhythmias if not detected early. Therefore, regular monitoring of potassium levels helps identify and correct electrolyte shifts promptly. Other labs like lipid panels, calcium, or a complete blood count aren’t needed for the immediate management of the insulin infusion, though they may be ordered for broader patient care. The key is to watch glucose closely to keep it in a safe range and monitor potassium to avoid complications from electrolyte imbalance.