Test Overview
Immunometric Chemiluminescence
Useful in the differential diagnosis of fluid and electrolyte balance, hydration status, aid in diagnosis of hyperparathyroidism.
PTH Intact: 10 - 65 pg/mL;
Calcium: Pediatric (1-12 years) 8.4 - 10.4 mg/dL
Adult (>12 years) 8.6 - 10.2 mg/dL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
8 hours
- C-Terminal Replacement Assay
- N-Terminal Replacement Assay
- IPTH
- Parathormone
- PTHR
- PARATHYROID HORMONE, INTACT
- PARATHORMONE, INTACT RAPID
- PARATHORMONE, INTACT
- PTHI
- TCAL
- PARATHYROID HORMONE, INTACT
- CALCIUM PTH
- MPTHI
- PTHVS
- PTHI Venous Sampling
Specimen Requirements
Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate up to 48 hours or freeze for longer storage. EDTA plasma is also acceptable. If sending EDTA plasma, include a copy or note on the requisition the patient's calcium result performed on a specimen collected within the previous 48 hours OR send 0.5 mL serum, refrigerated, for calcium level to be performed by MLabs. Clearly mark aliquots "plasma" or "serum" as appropriate. Add-on test requests for previously processed in-lab samples will be honored for 24 hours.
Additional Information
The Intact PTH assay is recommended for diagnosis of parathyroid disease. If either C-terminal or N-terminal assay is ordered, the client will be contacted to approve the intact PTH as a substitute test. The specimen will be saved for 1 week; the requesting physician should contact the MLabs Client Services Center if the C-terminal assay is required; the N-Terminal assay not available from any reference laboratory.