What is the preferred method for checking calcium levels post-thyroidectomy?

Checking calcium levels post-thyroidectomy is primarily done through a blood test. This is because blood tests provide a direct measurement of ionized calcium levels, which is crucial for assessing parathyroid function and the patient’s calcium status after surgery. The thyroid gland is intricately linked to the parathyroid glands, which regulate calcium in the body. Removal of the thyroid can inadvertently affect the parathyroid glands, leading to potential hypoparathyroidism and resulting in low calcium levels.

Monitoring calcium through a urine test would not provide the immediate and precise information needed after surgery. Similarly, physical examinations and blood pressure monitoring do not assess calcium levels directly. Therefore, the blood test is the most effective and accurate method for this purpose.