Methodology
Quantitative Radial Immunodiffusion
Synonyms
C2 Antigen; C2 Level; Classical Pathway - Complement; Complement Classical Pathway; Second Component of complement
Specimen Type
Serum
Performing Lab
ARUP
Epic ID
Other Reference Test
Lab Test Days
Monday and Thursday
Standard TAT
5-10 Days
Collection Information
Specimen Required
1-2 mL Blood
Container Type
Gold Serum Separator Tube (SST)
Processing Information - Lab Use Only
Transport Temperature
Frozen Only
Specimen Stability
Room Temp: 2 Hours; Refrigerated: Unacceptable; Frozen: 2 Weeks (Preferred)
Rejection Criteria
Non-frozen specimens; Specimens exposed to repeated freeze/thaw cycles; Specimens left to clot at refrigerated temperature
Test Volume Required
1 mL Serum
Minimum Test Volume
0.3 mL Serum
Processing Instructions
Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Complete an ARUP requisition and submit with sample frozen with daily Apollo Courier pick up.
CPT Codes
86160
Revised
7/19/23
Initials
SA