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C4a Level by RIA
Test Code19956
CPT Codes
86160
Preferred Specimen
1 mL frozen plasma collected in an EDTA (lavender-top) tube
Pediatric volume: 0.5 mL minimum
Minimum Volume
0.5 mL
Instructions
Centrifuge at room temp within one half hour of collection; preferably immediately after venipuncture. Transfer the cell-free plasma to a clean tube and store immediately at -20°C, then transfer to dry ice for shipment within 6 hours or immediately freeze on dry ice or at -70°C or below.
Send frozen plasma Priority Overnight via FedEx and in a well insulated container on dry ice.
Send frozen plasma Priority Overnight via FedEx and in a well insulated container on dry ice.
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen -20° C: 6 hours
Frozen -70° C: 1 year
Refrigerated: Unacceptable
Frozen -20° C: 6 hours
Frozen -70° C: 1 year
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Received thawed
Methodology
Radioimmunoassay (RIA)
FDA Status
The performance characteristics for this test have been validated by National Jewish Health. It has not been cleared or approved by the U.S. Food and Drug Administration. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. This laboratory is certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA-88) as qualified to perform high complexity clinical laboratory testing.
Setup Schedule
Set up: 1st and 3rd Thursday of each month; Report available: 18 days
