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Complement Component C4c
Test Code353
CPT Codes
86160
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
Transport Container
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 4 days
Frozen: 21 days
Refrigerated: 4 days
Frozen: 21 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature
Methodology
Immunoturbidimetric
Setup Schedule
Set up: Tues-Sat; Report available: 1-3 days
Clinical Significance
Decreased C4 level is associated with acute systemic lupus erythematosis, glomerulonephritis, immune complex disease, cryoglobulinemia, congenital C4 deficiency and generalized autoimmune disease.
