82600:COMPLEMENT C2

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82600:COMPLEMENT C2
Alias Names: C2
Methodology: Radial Immunodiffusion (RID)
Edit Date: 4/11/2006
Performed: Monday, Thursday
Released: 5-9 days after setup at PeaceHealth Laboratories’ reference lab.
CPT Code: 86160-90
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST).
Handling: Allow to clot for 30 minutes to 1 hour ambient. Centrifuge and separate serum from cells and pour into a plastic vial immediately. Freeze. CRITICAL FROZEN. Avoid repeated freeze/thaw cycles. If multiple tests are ordered, send separate specimen for this test.
Stability: After separation, specimen stable 2 hours ambient or 14 days frozen. Specimen unstable refrigerated.
Standard Volume: 1 mL serum.
Minimum Volume: 0.5 mL serum.
Transport: Frozen on dry ice.
Rejection Criteria: Specimen left to clot at refrigerated temperature (2-8° C); repeated freeze/thaw cycles; non-frozen specimen; plasma.

Decreased C2 levels may be associated with increased susceptibility to infection (especially pneumococcal infections), system lupus eyrthematosus-like disease, rashes, arthritis, nephritis, and with C1-Esterase deficiency. Increased C2 levels are associated with the acute phase response.
1.0-4.0 mg/dL