The nurse is preparing to administer insulin intravenously. Which statement about the administration of intravenous insulin is true?

Choice A rationale: This statement is incorrect. Insulin can and is administered intravenously in specific clinical situations, particularly for managing diabetic ketoacidosis (DKA) or hyperosmolar hyperglycemic state (HHS). Intravenous administration allows for rapid and precise titration of insulin dosage to achieve stable blood glucose levels. Choice B rationale: Regular insulin is the only type of insulin that can be administered intravenously. Its short duration of action and predictable profile make it ideal for titrating doses in a controlled hospital setting. Other types of insulin, such as rapid-acting or long-acting analogs, are not formulated for intravenous use and carry a risk of unpredictable effects. Choice C rationale: Insulin aspart and insulin lispro are rapid-acting insulins designed for subcutaneous administration. They are not approved or recommended for intravenous use due to their formulation and the potential for dose-response unpredictability. There is no established protocol for administering these insulins intravenously, even with a dose reduction. Choice D rationale: While intravenous insulin is often used in emergent situations like DKA or HHS, it is not limited to emergencies. It may also be used in other controlled settings, such as during surgery or in critical care, to manage hyperglycemia. Its use is based on the need for tight glycemic control rather than just emergency status.