ARUP's Laboratory Test Directory

Complement Component 2 : 0050148

Mnemonic: C2

Methodology: Radial Immunodiffusion
Performed: Mon, Thu
Reported: 5-9 days
Specimen Required: Collect:  One 4 mL serum separator tube.

Transport:  1 mL serum, frozen. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.15 mL serum, frozen.

Remarks:  CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Allow specimen to clot for one hour at ambient temperature. Separate serum from cells ASAP and freeze. Plasma is not recommended.

Unacceptable Conditions:  Specimens left to clot at 2-8°C. Specimens exposed to repeated freeze/thaw cycles. Nonfrozen specimens.

Stability:  After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
Reference Interval:
1.0-4.0 mg/dL
Interpretive Data: Decreased C2 levels may be associated with increased susceptibility to infection (especially pneumococcal infections), systemic lupus erythematosus-like disease, rashes, arthritis, nephritis, and with C1-Esterase deficiency.  Increased C2 levels are associated with the acute phase response.

Please refer to Statement D in the Compliance Statements section in the front of the Laboratory Test Directory.
CPT Code(s): 86160
 
 

 

 

 
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