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The management of hypocalcemia (HC) after total thyroidectomy (TTx) is a challenge as TTx is transitioned into a same-day surgery. Measurement of parathyroid hormone (PTH) level after TTx may allow for prediction of postoperative HC and lead to shorter hospital stays. A prospective database was queried between January 2010 and June 2012 with 95 patients who had undergone TTx identified. Patient demographics; preoperative diagnosis; laboratory values and cost; complications; intravenous calcium supplementation; and length of stay (LOS) were analyzed. A PTH-based algorithm was retrospectively applied and theoretical cost savings were analyzed in terms of laboratory cost, LOS, and total cost. Ninety-five patients underwent TTx: 37 patients (38.9%) had cancer, whereas 27 (28.4%) had Graves' disease and the remaining 31 (32.6%) had a benign multinodular goiter. Postoperative PTH was recorded in 72 patients (74.4%); 46 (63.8%) had PTH greater than 10 pg/mL and 26 (36.9%) had PTH less than 10 pg/mL. Transient HC occurred in 10 patients (38.4%) with PTH less than 10 pg/mL (relative risk, 17.69; P = 0.0001). Patients with PTH less than 10 pg/mL incurred a 14.9 per cent higher hospital cost compared with those with PTH greater than 10 pg/mL. With retrospective implementation of the algorithm, there is a potential 46.4 per cent cost savings for the PTH less than 10 pg/mL group, 67.3 per cent savings for the PTH greater than 10 pg/mL group, and 46.7 per cent savings when taken altogether. Algorithmic risk stratification based on postoperative PTH less than 10 pg/mL serves as both a sensitive (100%) and specific (76.7%) predictor of postoperative HC. Such risk stratification may allow for same-day discharge in a number of patients, and even in patients requiring an overnight stay, result in cost savings as a result of a reduction in laboratory expenditures.

Citation

Meghan McCullough, Collin Weber, Chris Leong, Jyotirmay Sharma. Safety, efficacy, and cost savings of single parathyroid hormone measurement for risk stratification after total thyroidectomy. The American surgeon. 2013 Aug;79(8):768-74

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PMID: 23896242

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