PTH determination in hemodialyzed patients-A laboratory perspective

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Etienne Cavalier1,2,3, Jean-Claude Souberbielle4, Pierre Delanaye5

  • 1Department of Clinical chemistry, CHU de Liège, University of Liège, Liège, Belgium.

Seminars in Dialysis
|October 22, 2019
PubMed

Insights

Measuring parathyroid hormone (PTH) in chronic kidney disease (CKD) patients is complex due to issues with PTH stability, assay standardization, and potential in vivo oxidation, impacting accurate CKD-MBD monitoring.

Area of Science:

  • Biochemistry
  • Nephrology
  • Endocrinology

Background:

  • Parathyroid hormone (PTH) is crucial for bone remodeling in Chronic Kidney Disease-Mineral and Bone Disorder (CKD-MBD).
  • Serum PTH levels are routinely monitored in patients with chronic kidney disease (CKD).

Discussion:

  • PTH stability is a significant concern, with degradation occurring during improper storage.
  • Immunoassays may detect biologically active PTH alongside inactive fragments and oxidized forms.
  • Lack of assay standardization leads to variability and confusion in patient monitoring.

Key Insights:

  • Assay variability complicates consistent patient management across different healthcare settings.
  • Established reference ranges, particularly upper limits, are often inadequately defined.
  • In vivo oxidation of PTH can lead to overestimation of biologically active hormone levels.

Outlook:

  • Standardization of PTH assays is essential for reliable CKD-MBD management.
  • Further research is needed to address PTH stability and oxidation issues.
  • Improved measurement techniques will enhance patient care and therapeutic decisions in CKD.

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