The influence of prophylactic Calcium- and Magnesium supplementation on postoperative hypocalcemia after total thyroidectomy: study protocol for a randomized controlled trial
• BackgroundWe want to investigate if a routine preoperative dietary supplementation of calcium and magnesium prior to thyroidectomy for nodular goiter and grave´s disease can influence patients' outcome with regards to hypocalcemia associated symptoms and quality of life in order to reduce the risk of post-thyroidectomy hypocalcemia and to improve patient's quality of life.• MethodsThe study will be conducted as a two-armed randomized controlled trial with patients scheduled for total
... tomy. The patients assigned to the intervention group will receive calcium carbonate and magnesium oxide, and will begin the intake 2 weeks preoperatively. Primary outcome is the postoperative quality of life measured by using the ThyPRO-39 and EQ-5D questionnaires. Secondary outcome is the assessment of postoperative biochemical (calcium and PTH levels) and clinical hypocalcemia (symptoms as reported by the patient).• DiscussionA prophylactic dietary substitution with calcium and magnesium, which could easily be done in the preoperative setting, could potentially help to avoid or reduce hypocalcemia-associated symptoms and improve quality of life. In the event of a positive outcome, this preoperative procedure can be an inexpensive way to prepare patients scheduled for thyroidectomy and can possibly reduce disease-specific costs by reducing the postoperative complication rate.• Trial registration: DRKS00017195 in the German clinical trials register (Deutsches Register Klinischer Studien, DRKS) on the 22.05.2019.