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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. | |||||||||||||||||||
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1.0-4.0 mg/dL
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