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  • Title: Preoperative Vitamin D Supplementation in Patients With Vitamin D Deficiency Undergoing Total Thyroidectomy.
    Author: Ramouz A, Hosseini M, Hosseinzadeh SS, Rasihashemi SZ.
    Journal: Am J Med Sci; 2020 Aug; 360(2):146-152. PubMed ID: 32466854.
    Abstract:
    BACKGROUND: Transient hypocalcemia due to parathyroid gland or vessel manipulation is a common complication following thyroidectomy. Considering the role of 25-hydroxyvitamin D (25(OH)D) in calcium hemostasis, this study aimed to evaluate the effect of preoperative vitamin D supplementation on hypocalcemia incidence in thyroidectomy patients. METHODS: In this randomized clinical trial, 100 patients scheduled for total thyroidectomy and suffering from preoperative moderate or severe vitamin D deficiency were enrolled. Patients were randomly allocated to either study or control groups using the sealed envelope method. Patients in the study group received vitamin D3 50,000-unit pearl weekly for 4 weeks prior to the operation. The control group received placebo. Total and ionized serum calcium levels were checked before surgery, the day after surgery, and 2 weeks postoperatively. RESULTS: No significant difference was observed in terms of demographic data. During serial total calcium checks (5 episodes), total calcium levels changed significantly in patients who had received vitamin D supplements compared to the control group (P = 0.043). Symptomatic hypocalcemia incidence was significantly lower in patients supplemented with 25-hydroxyvitamin D (25(OH)D) (P = 0.04). Also, the requirement for intravenous calcium administration in order to treat the hypocalcemia symptoms was significantly lower in the study in comparison to the control group (P = 0.03). CONCLUSIONS: Vitamin D supplementation in patients with vitamin D deficiency might lead to a lower incidence of early-onset symptomatic hypocalcemia; hence, requiring less calcium supplementation for the management of hypocalcemia.
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