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Complement Component C1q
Test CodeC1QCC
Alias/See Also
981
CPT Codes
86160
Preferred Specimen
1 mL serum
Minimum Volume
0.1 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube or PPT (white-top) tube
Instructions
Separate serum within one hour of draw time and refrigerate.
Can be drawn in a gel barrier tube but needs to be separated within one hour from time drawn.
Can be drawn in a gel barrier tube but needs to be separated within one hour from time drawn.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 4 days
Refrigerated: 10 days
Frozen: 29 days
Refrigerated: 10 days
Frozen: 29 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Gross lipemia
Methodology
Radial Immunodiffusion (RID)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Daily; Report available: 3-7 days after receipt at the performing laboratory. Add three (3) days for transport.
Reference Range
5.0-8.6 mg/dL
Clinical Significance
The complement system is critical to the inflammatory response. C1q concentrations may be decreased in patients with acquired angioedema, immune complex induced vasculitis, and concurrent low concentrations of C1 inhibitor, carcinoma, or lymphoma.
Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |
Last Updated: June 22, 2023