Final answer:
The finding that would require immediate follow-up is the infusion rate set at 200 mg/min.
Step-by-step explanation:
The finding that would require immediate follow-up is A. The infusion rate is set at 200 mg/min.
Hypomagnesemia is a condition characterized by low levels of magnesium in the blood. Magnesium is an essential electrolyte that is important for various metabolic processes in the body.
Administering magnesium replacement intravenously is a common treatment for hypomagnesemia. However, a high infusion rate of 200 mg/min can potentially lead to adverse effects such as flushing, sweating, and low blood pressure. Therefore, the nurse should immediately follow up and consider adjusting the infusion rate to prevent complications.