This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preoperative assessment and monitoring in anaesthesia, Subject name: Anaesthesia
[{'content': 'A 23-year-old woman undergoes total thyroidectomy for carcinoma of the thyroid gland. On the second postoperative day, she begins to complain of a tingling sensation in her hands. She appears quite anxious and later complains of muscle cramps. Which of the following is the most appropriate initial management strategy? \nSelect and explain. \nA. 10 mL of 10% magnesium sulfate intravenously, B. Oral vitamin D, C. 100 mg oral Synthroid, D. Continuous infusion of calcium gluconate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Intravenous calcium infusion is the treatment for severe, symptomatic hypocalcemia, although, typically, oral calcium supplementation (up to 1-2 g every 4 hours) is sufficient in patients with mild symptoms. Since postthyroidectomy hypocalcemia is usually due to transient ischemia of the parathyroid glands and is self-limited, in most cases the problem is resolved in several days. In cases of persistent hypocalcemia, vitamin D preparations may be necessary. There is no role for thyroid hormone replacement or magnesium sulfate in the treatment of hypocalcemia.', 'role': 'assistant'}]