Abstract
Objective:To investigate the predictive value of parathyroid hormone levels and decreases for postoperative hypocalcemia after total thyroidectomy. Method:We reviewed 71 consecutive patients who underwent total thyroidectomy, measured postoperative hypocalcemia, parathyroid hormone (PTH) values within 24 hours after surgery, divided them into subgroups accroding to hypocalcemia symptom. Combining with postoperative serum calcium，postoperative PTH values and decreases (△PTH), we used the receiver operating characteristic curve (ROC) analysis to assessment of predictive value. Result:The mean value of postoperative serum calcium, postoperative PTH and △PTH between subgroups have a significant difference (P<0.01). ROC area under the curve (AUC) of △PTH is 0.9706, with cutoff value 0.7366. AUC of postoperative PTH is 0.9580, with cutoff value 14.82 ng/L. Conclusion:The postoperative PTH and △PTH is a reliable indicator to judging postoperative hypocalcemia after total thyroidectomy.
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