Predictors of Postoperative Hypocalcemia after Thyroidectomy for Nontoxic Multinodular Goiter

Abstract

The aim of this prospective study was to determine the main factors influencing the development of postoperative hypocalcemia in patients with Gravesdisease after thyroidectomy. Assess whether patients with BG likely to develop postoperative hypocalcemia than those who performed thyroidectomy about nontoxiс multinodular goiter. In this study were prospectively included 54 patients with Gravesdisease, which from October 2011 to May 2013 was performed thyroidectomy. Additionally, as a control group from the database included 48 patients with nontoxiс multinodular goiter, who underwent thyroidectomy in the same time. All patients attended deficit/insufficiency of vitamin D (25(OH)D were 20/30 ng/ml). Patients were divided into 2 groups according to the postoperative calcium concentrations corrected for albumin in the blood: Group 1 - patients with postoperative levels of calcium in the blood of 2.0 mmol/l or less; Group 2 - Patients with blood calcium levels above 2.0 mmol/l. Thus, when patients Gravesdisease Group 1 disease duration was significantly higher concentration of 25(OH)D and postoperative parathyroid hormone was significantly lower compared to the 2nd group. According to logistic regression analysis, postoperative PTH level below 10 pg/ml was the main predictors of postoperative hypocalcemia ( p < 0,001). Patients with Gravesdisease increasingly requiring the appointment of calcium after the operation, they are demonstrating a significant clinical signs of hypocalcemia than patients with nontoxiс multinodular goiter after thyroidectomy.