Follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.
Quantitative Radial Immunodiffusion
New York DOH Approval Status
Plain Red. Also acceptable: Lavender (K2 EDTA) or Plasma Preparation Tube (PPT).
Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.1 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Room temperature. Also acceptable: Refrigerated or frozen
Ambient: 3 weeks; Refrigerated: 3 weeks; Frozen: 3 weeks
Performed by non-ARUP Laboratory
|Component Test Code*||Component Chart Name||LOINC|
|0099073||Complement Component 7||4508-8|
Quest Diagnostics San Juan Capistrano Inc.