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Neopterin, Serum
Test Code93917
CPT Codes
83520
Preferred Specimen
0.8 mL serum - protected from light
Minimum Volume
0.3 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube - protected from light
Instructions
If tube other than a gel-barrier tube is used, transfer separated serum or plasma to a plastic amber, protected from light transport tube.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 72 hours
Frozen: 6 months
Refrigerated: 72 hours
Frozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Not light protected
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Mon; Report available: 5-8 days
Reference Range
| Adults | <2.5 ng/mL |
Clinical Significance
Increased levels of neopterin are found during impaired renal function and viral infections in transplant patients. Elevated levels are also indicators for conditions related to impaired cellular immunity.
