Final answer:
The nurse would give supplemental doses of regular insulin to lower the client's elevated blood glucose levels.
Step-by-step explanation:
The nurse would give supplemental doses of regular insulin for a client with type 1 diabetes and elevated blood glucose. Insulin is the primary treatment for type 1 diabetes, as it helps transport and store glucose to lower blood glucose levels. In this case, the supplemental doses of insulin would be administered to bring the client's blood glucose back to normal.