D VİTAMİNİ DÜZEYİNİN TOTAL TİROİDEKTOMİ SONRASI HİPOKALSEMİ RİSKİ ÜZERİNE ETKİSİ THE EFFECT OF VITAMIN-D INSUFFICIENCY ON HYPOCALCEMIA AFTER TOTAL THYROIDECTOMY
2015
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 1 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.
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