UW Hospital and Clinics Lab Test Directory
| Test Name: |
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PTH
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| Test Code(s): |
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PTHIN / HCPTHIN
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| CPT Code(s): |
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83970
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| Methodology: |
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Chemiluminescent Immunoassay
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| Days Performed: |
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Mon-Fri, dayshift.
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| Turnaround Time: |
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Routine: Next working day.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Container: |
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Preferred: Lavender top
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| Collection Volume: |
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Preferred: 4 mL
Pediatrics: 1 mL
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| Sample Analyzed: |
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Plasma
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| Volume Required: |
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Preferred: 1 mL
Pediatrics: 0.4 mL
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| Specimen Processing: |
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Centrifuge immediately. Transfer cell-free plasma to plastic screw cap vial. Refrigerate.
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.
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| Stability: |
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Ambient: 3 hours (whole blood), 8 hours (plasma)
Refrigerated: 3 days
Frozen: 8 months
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Interpretation
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Reference Interval:
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18 years and up: 14-72 pg/mL
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| Test Limitations: |
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Results may be affected if patient has developed heterophilic antibodies due to exposure to animal based protein products.
High dose biotin therapy may falsely depress results.
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| Additional Information: |
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No hook dose effect up to 100,000 pg/mL.
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PTH-Intact Hormone-N Terminal
Parathyroid Hormone Intact Molecule
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