Final answer:
An enhanced serum calcium level indicates a therapeutic response to calcium citrate in a patient with hypocalcemia.
Step-by-step explanation:
The nurse should identify that an enhanced serum calcium levels indicates a therapeutic response to calcium citrate in a patient with hypocalcemia. Hypocalcemia is a condition characterized by low levels of calcium in the blood, and calcium citrate is used to increase calcium levels. Therefore, an increase in serum calcium levels would indicate that the medication is working effectively.