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Test Code 272 Parathyroid Hormone (PTH) Intact

Important Note

Human Anti-Mouse Antibodies (HAMA) may be present in samples from patients who have received immunotherapy utilizing monoclonal antibodies. Additionally, other heterophile antibodies such as human anti-goat antibodies may be present in patient samples. Manufacturers formulate assays to minimize the effects of these antibodies; however careful evaluation of patient results must be done when patients are known to have such antibodies.

Additional Codes

ALAB: PTHI

PowerChart: Parathyroid Hormone (PTH) Intact

MA Cerner: PTH Intact

Test Method

Mercy: Two-Site Immunoenzymatic ("Sandwich") Assay; Beckman DxC700AU

MA: Sandwich method, Roche Cobas 6000

Specimen Requirement

Mercy: 0.5 mL serum or plasma (heparin or EDTA) is required.

MA: 50 mcL EDTA plasma is preferred specimen type. Note: Serum samples are acceptable but must be spun immediately following the 30-minute clot time. 

Additional Specimen Collection Information

Mercy: Collect blood in a lithium heparin, green-top, EDTA, purple top, or red-top tube. PST and SST (gel tubes) are acceptable. Serum or plasma should be separated from contact with the cells within 2 hours of collection. Specimens not centrifuged within 4 hours of collection may be rejected. Refrigerate the specimen if unable to assay within 8 hours of collection. Samples with ≥3+ lipemia must be cleared prior to analysis.

Performance

Testing is performed Monday through Sunday.

Typically completed the same day the specimen arrives at the testing site.

Reference Values

15-65 pg/mL

CPT Code Information

83970: Chemistry: Parathormone (parathyroid hormone)

Useful For

Diagnosis and differential diagnosis of hypercalcemia

Diagnosis of primary, secondary, and tertiary hyperparathyroidism

Diagnosis of hypoparathyroidism

Monitoring end-stage renal failure patients for possible renal osteodystrophy

 

LOINC Code Information

2731-8 Parathyrin.Intact [Mass/Volume] In Serum Or Plasma

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