THE EFFECT OF VITAMIN-D INSUFFICIENCY ON HYPOCALCEMIA AFTER TOTAL THYROIDECTOMY

Objective: hypocalcemia is the most frequent complication after thyroidectomy. we aimed to compare the impact of serum vitamin d level in postoperative hypocalcemia after total thyroidectomy.material-method: the records of 89 consecutive patients who underwent total thyroidectomy were retrospectively analyzed. patients were divided into 2 groups according to preoperative vitamin d levels. in group 1(n = 63) preoperative 25-oh vitamin d level is ≤20 ng/ml, in group 2 (n=26) preoperative 25-oh vitamin d level is >20 ng/ml. groups were compared according to their age, preoperative and postoperative corrected calcium and pth levels.results: the mean age was 47.8±14.1 and female/male ratio was 70/19 (3.68 / 1) in the whole group of patients. the mean preoperative pth values was 54.8±22.6 pg/ml and the mean postoperative pth value was 30±19 pg/ml. postoperatively pth and calcium levels were significantly lower than preoperative pth and calcium levels.the demographic data showed no significant difference between two groups. the mean vitamin d level in group 1 and 2 were found 11.1±4 ng / ml and 30.6±10.4 ng / ml; respectively. although the preoperative serum pth levels showed statistically significant difference between the two, all were found in normal ranges. postoperative 1st day pth levels were similar in two groups. postoperative corrected calcium values showed no significant difference between group 1 and 2.conclusion: though vitamin d deficiency is a common entity in patients undergoing total thyroidectomy, this present study failed to show any relation between preoperative vitamin d levels and postperative hypocalcemia