Complement Component 3A
2003304
Ordering Recommendation
Follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.
Mnemonic
COMP 3A
Methodology
Radioimmunoassay
Performed
Varies
Reported
14-21 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Lavender (EDTA).  
Specimen Preparation
Separate from cells within 1 hour of draw. Transfer 1 mL plasma to an ARUP Standard Transport Tube. Freeze at -70or on dry ice immediately. (Min: 1 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Refrigerated or room temperature specimens.  
Remarks
  
Stability
Ambient: Unacceptable; Refrigerated: Unacceptable: Frozen at -70°C: 1 month  
Reference Interval
By report  
Interpretive Data
 
Note
 
CPT Code(s)
86160
Components
Component Test Code*Component Chart NameLOINC
2003305Complement Component 3A4488-3
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • C3A (Complement Component 3A)

Performed at National Jewish