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Τρίτη 27 Νοεμβρίου 2018

Evaluating a shortened interpretation criterion for intraoperative parathyroid hormone monitoring in patients with primary hyperparathyroidism: A 5‐minutes criterion in primary hyperparathyroidism and intraoperative algorithm

Abstract

Background

Most criteria require a parathyroid hormone (PTH) decline of ≥50% within 10 minutes after excision of the gland during surgery for primary hyperparathyroidism. The aim was to evaluate a model allowing earlier prediction of cure.

Methods

One thousand eighteen patients with primary hyperparathyroidism were included. A ≥50% decline from baseline within 10 minutes after excision intraoperatively predicted complete removal of hypersecreting tissue. The data were reanalyzed regarding a criterion, requiring a ≥50% decline after 5 minutes. Based on the data and the present literature, an algorithm was created.

Results

Assay predicted cure in 854 patients (true‐positive; 83.89%) after 10 minutes (false‐positive [FP] in 13 patients; 1.52%). Nevertheless, only 14 (1.83%) showed persisting disease. According to the "5 minutes" criterion, 723 patients (71.02%) showed a ≥50% decline from baseline within 5 minutes and 10 (1.38%) patients had a FP decline (sensitivity 0.75, specificity 0.86).

Conclusion

Using a modified criterion, surgery can be discontinued 5 minutes earlier in 71%.



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