What are typical manifestations of hypocalcemia and how should it be treated after thyroid surgery?

• A. Chest pain and diarrhea; treat with fluids.
• B. Perioral numbness, tingling, and muscle cramps; treat with calcium supplementation and vitamin D; monitor levels and adjust dosing.
• C. Weight gain and fatigue; treat with thyroid meds.
• D. Nausea and vomiting; treat with antiemetics.

Answer: (B)

Hypocalcemia after thyroid surgery is most often from damage or devascularization of the parathyroid glands, leading to low PTH and reduced calcium regulation. The classic manifestations are perioral numbness and tingling, muscle cramps or tetany due to increased neuromuscular excitability. In more severe cases you can see carpal spasm, facial twitching, or even seizures.

Treatment aims to restore calcium and ensure adequate vitamin D to promote calcium absorption. This means calcium supplementation with an active form of vitamin D (calcitriol) and careful dose titration based on serum calcium and symptoms. If the patient is acutely symptomatic or has very low calcium, IV calcium (calcium gluconate) is given to rapidly correct levels, followed by transition to oral calcium with calcitriol and dose adjustments as stabilization occurs.

Ongoing monitoring should include serial calcium (and often phosphorus and magnesium) and clinical assessment, adjusting doses to keep calcium in the low-normal to normal range without causing hypercalcemia. The other options described do not reflect the typical pattern or treatment strategy for hypocalcemia after thyroid surgery.