Following a total thyroidectomy, which serum electrolyte should be monitored closely?

Following a total thyroidectomy, calcium levels should be monitored closely due to the risk of hypoparathyroidism. During the procedure, the parathyroid glands—responsible for regulating calcium levels in the body—may be damaged or removed inadvertently. This can lead to a decrease in parathyroid hormone (PTH) production, which in turn results in lower serum calcium levels.

Calcium plays a crucial role in various bodily functions, including muscle contraction, nerve function, and blood clotting. Hypocalcemia can present with symptoms such as muscle twitching, tingling sensations, and, in severe cases, seizures. Therefore, close monitoring of calcium levels is essential in patients who have undergone a total thyroidectomy to manage any potential complications arising from parathyroid gland compromise.

In contrast, while sodium, magnesium, and potassium are important electrolytes, their levels do not have a direct association with the consequences of a total thyroidectomy. Thus, monitoring calcium takes precedence in this scenario.