A patient had a thyroidectomy and now reports tingling around the mouth and has a positive Chvostek sign. What laboratory finding would be most helpful to the healthcare professional?
a. TSH and T4
b. Serum sodium
c. Serum calcium
d. Urine osmolality
a. TSH and T4
b. Serum sodium
c. Serum calcium
d. Urine osmolality