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Predictive value of intact parathyroid hormone measurement during surgery for renal hyperparathyroidism

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Abstract

Background and aims

In contrast to that in patients with primary hyperparathyroidism, the value of intraoperative intact parathyroid hormone (iPTH) measurement is still unclear in patients with renal hyperparathyroidism and was, therefore, evaluated in a large cohort of patients.

Patients

Intraoperative iPTH measurement was performed in 153 patients with renal hyperparathyroidism (129 with terminal renal failure and 24 with functioning kidney graft). Subtotal and total parathyroidectomy were performed in 123 and 13 patients, respectively, during initial surgery. In patients with recurrent disease (17), the respective hyperfunctioning tissue was removed. Intraoperative blood samples were obtained by puncture of the internal jugular vein before preparation of the parathyroids (PTH0) and 15 min after parathyroidectomy (PTH15). iPTH was measured with the Elecsys 2010 system. Postoperative iPTH levels (PTHpost) were determined at postoperative days 1 to 3 and at week 2. Patients were arbitrarily divided in four groups according to the postoperative iPTH values: 0–25 pg/ml (group 1), 26–65 pg/ml (group 2), 66–150 pg/ml (group 3) and more than 150 pg/ml (group 4).

Results

The mean PTH0 value was 869±57 pg/ml, which decreased to 167±15 pg/ml at PTH15. The mean relative PTH15 value was 21.6±1.7%. Postoperatively, iPTH decreased to 42±9 pg/ml. The postoperative iPTH value of the 129 patients with terminal renal failure was 25 pg/ml or less in 99 patients, 26–65 pg/ml in 11 patients, 66–150 pg/ml in eight patients and higher than 150 pg/ml in 11 patients. Two successive criteria of iPTH decrease were used: first, a PTH15 of ≤150 pg/ml or, second, a relative PTH15 of ≤30% less was used. Fifteen patients did not fulfil both criteria. In 13 of them (86.7%) iPTHpost was higher than 65 pg (true failure to decline). Of 114 patients who fulfilled the criteria, 108 (94.7%) had normal postoperative iPTH values (true decline). Absolute PTH15 values of less than 150 pg/ml predicted normal postoperative iPTH levels in 77 of 78 patients.

Conclusion

A PTH15 value of 150 pg/ml or less predicts operative success in patients with renal failure in 98.7% of cases, independently of the relative decay. In contrast, if the relative PTH15 is higher than 30%, high postoperative PTH values are predicted with a probability of 86.7%. Although there remain some borderline cases, intraoperative iPTH measurement is accurate and also can be useful in patients with renal hyperparathyroidism.

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Authors and Affiliations

  1. Department of General, Visceral and Transplant Surgery, Charité Campus Virchow, Humboldt University of Berlin, Berlin, Germany

    Daniel Seehofer, Nada Rayes, Jochen Klupp, Thomas Steinmüller, Frank Ulrich & Peter Neuhaus

  2. Department of Clinical Chemistry, Charité Campus Virchow, Humboldt University of Berlin, Berlin, Germany

    Christian Müller

  3. Department of Nephrology, Charité Campus Virchow, Humboldt University of Berlin, Berlin, Germany

    Ralph Schindler & Ulrich Frei

Authors
  1. Daniel Seehofer
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  2. Nada Rayes
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  3. Jochen Klupp
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  4. Thomas Steinmüller
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  5. Frank Ulrich
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Correspondence to Daniel Seehofer.

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Seehofer, D., Rayes, N., Klupp, J. et al. Predictive value of intact parathyroid hormone measurement during surgery for renal hyperparathyroidism. Langenbecks Arch Surg 390, 222–229 (2005). https://doi.org/10.1007/s00423-005-0541-z

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  • DOI: https://doi.org/10.1007/s00423-005-0541-z

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