Journal
AMERICAN JOURNAL OF SURGERY
Volume 206, Issue 6, Pages 876-881Publisher
EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC
DOI: 10.1016/j.amjsurg.2013.08.020
Keywords
Prospective trial; Total thyroidectomy; Completion thyroidectomy; Postoperative parathyroid hormone levels; Vitamin D; Postoperative hypocalcemia
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BACKGROUND: Hypocalcemia is a common complication of thyroidectomy. The aim of this study was to identify risk factors for this problem. METHODS: This prospective analysis included 111 patients undergoing total or completion thyroidectomy. Preoperative vitamin D levels and postoperative day 1 parathyroid hormone levels were analyzed for their predictive effects on postoperative hypocalcemia. RESULTS: Patients with ionized calcium <4.4 mg/dL had significantly lower mean parathyroid hormone levels than normocalcemic patients (13.0 vs 28.4 pg/mL, P < .001). Parathyroid hormone levels were also significantly lower in symptomatic patients (11.0 vs 28.4 pg/mL, P < .001). Preoperative vitamin D level, body mass index, gender, and pathologic findings were not associated with low calcium levels or symptoms of hypocalcemia. CONCLUSIONS: Younger age and low postoperative parathyroid hormone levels are predictive of symptomatic hypocalcemia. A parathyroid hormone level outside of the reference range may indicate a need for more aggressive postoperative calcium supplementation and treatment with activated vitamin D. Older patients with normal postoperative parathyroid hormone levels may be safely discharged with appropriate calcium supplementation. (C) 2013 Elsevier Inc. All rights reserved.
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