A 50-year-old gentleman presents 2 weeks following a thyroidectomy. He has been experiencing perioral numbness and muscle cramps.

1. Other than damage to his parathyroid glands during the thyroid surgery, please list (5) other causes for hypocalcaemia 5 marks

His total and ionized calcium were low, confirming hypocalcaemia.

2. What (4) other investigations would you order and justify your choices 4 marks

3. What are (3) indications for intravenous calcium replacement rather than oral calcium? 3 marks