Specimen Requirements

Title

C4 COMPLEMENT COMPONENT

Specimen Requirement

1 SST/1.0 mL serum. After 30 minutes of clotting, promptly centrifuge and refrigerate serum.

Methodology

Stability

Room Temp: 72 hours; Refrigerated: 1 week; Frozen: 2 months

Reference Range

By Report*

Turnaround

3 Days Setup Mon-Sat AM

Clinical Use

Quantitation of C4 is used to detect individuals with inborn deficiency of the factor or those with immunological disease in whom hypercatabolism of complement causes reduced levels. These diseases include lupus erythematosus, serum sickness, certain glomerulonephritides, chronic active hepatitis, and others.

Test Code

C4S