The nurse is preparing to administer Regular insulin to a client with a blood glucose of 265. What action should the nurse take to determine the correct dose?

The correct answer is C because reviewing the Regular insulin sliding scale in the patient's electronic medical record is essential to determine the correct dose based on the client's current blood glucose level of 265. The sliding scale provides specific instructions on how much insulin to administer based on the blood glucose level at that moment. This individualized approach ensures that the client receives the appropriate dose to bring their blood glucose levels within the target range. Reviewing previous blood glucose levels (choice A) or previous insulin administration doses (choice D) may not reflect the current situation and could lead to an incorrect dose. Choice B is incorrect as it is crucial to always verify the dose before administering insulin.