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Updated: Jun 8, 2026
Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
Published on: August 17, 2022
Changing intraoperative parathyroid hormone collection sites from peripheral to central does not affect predictive
Sherif R Z Abdel-Misih1, James T Broome, Xiaobai Li
1Division of Surgical Oncology, The Ohio State University Medical Center/James Cancer Hospital, Columbus, OH, USA.
Insights
Changing intraoperative parathyroid hormone (ioPTH) monitoring (IPM) assay collection sites from peripheral to central veins does not significantly impact predictive accuracy for minimally invasive parathyroidectomy success. This finding supports flexibility in IPM sampling when peripheral access is difficult.
Area of Science:
- Endocrinology
- Surgical Oncology
- Clinical Chemistry
Background:
- Intraoperative parathyroid hormone (ioPTH) monitoring (IPM) is crucial for minimally invasive parathyroidectomy success.
- Current IPM techniques involve varied sampling sites, potentially affecting predictive accuracy.
- Peripheral sampling is standard, but central sampling may be necessary when peripheral access is limited.
Purpose of the Study:
- To evaluate if changing IPM assay collection sites from preexcision peripheral veins to postexcision central veins affects predictive accuracy.
- To determine if central sampling is a viable alternative when peripheral sampling is compromised.
Main Methods:
- Analysis of 64 patients undergoing parathyroidectomy for primary hyperparathyroidism.
- Simultaneous peripheral vein (PV) and central vein (CV) PTH assays collected preexcision and 10 minutes postexcision.
- IPM success defined as ≥50% PTH decrease 10 minutes postexcision; predictive accuracy assessed by gland re-resection and postoperative normalization.
- Receiver operating characteristic (ROC) analysis with area under the curve (AUC) compared diagnostic accuracy.
Main Results:
- Central ioPTH levels were significantly higher than peripheral levels both pre- and postexcision (p < 0.001).
- The AUC for changing from PV preexcision to CV postexcision was 0.89, comparable to peripheral (0.83) or central (0.85) sampling alone.
- This indicates similar diagnostic accuracy across different sampling site strategies.
Conclusions:
- Altering IPM assay collection sites between peripheral and central veins does not compromise assay validity.
- Changing from peripheral to central sampling sites is unlikely to significantly alter IPM's predictive accuracy.
- This supports the adaptability of IPM in clinical practice, especially when peripheral sampling is challenging.
Background:
Intraoperative parathyroid hormone (ioPTH) monitoring (IPM) is vital to minimally invasive parathyroidectomy. Techniques vary in assay sampling, potentially affecting predictive accuracy of operative success. Initial guidelines were established using peripheral sites, but central sites may be preferred or necessary when peripheral access is not feasible. We hypothesize that changing collection sites from preexcision peripheral sites to postexcision central sites would not affect IPM accuracy.
Methods:
Analysis of 64 consecutive patients who underwent parathyroidectomy for primary hyperparathyroidism was undertaken. PTH assays were collected simultaneously from a peripheral vein (PV) and central vein (CV) preexcision and at a 10-min interval after initial parathyroid excision. IPM success was defined as PTH decrease ≥50% 10 min after initial excision. Predictive accuracy was determined by the need to resect another abnormal gland and biochemical normalization in the postoperative clinic. Receiver operating characteristic (ROC) method with area under the curve (AUC) compared diagnostic accuracy of different assay approaches.
Results:
Centrally, a statistically higher mean pre- and postexcision ioPTH of 391 pg/ml and 58 pg/ml was found compared with peripheral means of 156 pg/ml and 49 pg/ml, respectively (p < 0.001). The AUC when changing from a PV preexcision to a CV postexcision ioPTH was 0.89, comparable to AUC for peripheral or central assay collections alone (AUC = 0.83 and 0.85, respectively).
Conclusions:
This study suggests that altering collection sites does not alter assay validity. In cases where peripheral sampling is compromised, changing from a peripheral to central sites will not likely alter the predictive accuracy of IPM significantly.
