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Intraoperative parathyroid hormone analysis: A study of 200 consecutive cases
L J Sokoll1, H Drew, R Udelsman
1Departments of Pathology and Surgery, Johns Hopkins Medical Institutions, Baltimore, MD 21287, USA. lsokoll@jhmi.edu
Clinical Chemistry
|October 6, 2000
Summary
A new rapid parathyroid hormone (PTH) assay enables quick intraoperative monitoring of parathyroid surgery success. This assay demonstrated excellent analytical performance and accurately predicted surgical outcomes in a large patient cohort.
Area of Science:
- Endocrinology
- Surgical Pathology
- Clinical Chemistry
Background:
- Rapid immunoassays for parathyroid hormone (PTH) allow for intraoperative monitoring of parathyroid surgery.
- Short incubation times (<15 min) provide timely results for surgical decision-making.
Purpose of the Study:
- To evaluate the analytical performance of a novel rapid PTH assay.
- To assess the clinical utility of this rapid PTH assay in predicting parathyroid surgery success.
Main Methods:
- A modified immunochemiluminometric assay with a 7-min incubation time was used.
- The rapid assay was compared against a central laboratory immunoradiometric assay (IRMA).
- Intraoperative PTH levels were measured before and after gland resection in 200 patients.
Main Results:
- The rapid PTH assay showed good precision, with intraassay imprecision of 11-12%.
- Excellent correlation was observed between the rapid assay and IRMA (r=0.984).
- The assay accurately predicted surgical success in 88% of cases based on a 50% PTH decrease, and 97% when including delayed decreases.
Conclusions:
- The rapid PTH assay exhibits excellent analytical performance.
- The assay demonstrates strong agreement with established PTH measurement methods.
- This rapid PTH assay is a reliable tool for predicting parathyroid surgery outcomes.