Complement Factor B
0051720
Ordering Recommendation
Follow-up test for complement activity screening when CH50 is normal and AH50 is low.
Submit With Order
Mnemonic
COMP FAC B
Methodology
Quantitative Radial Immunodiffusion
Performed
Mon, Wed, Fri
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Serum separator tube.  
Specimen Preparation
Allow specimen to clot for 30 minutes to one hour at refrigerated temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube and place on refrigerant pack or freeze immediately. (Min: 0.3 mL)  
Storage/Transport Temperature
Frozen.  
Unacceptable Conditions
Room temperature specimens. Specimens exposed to repeated freeze/thaw cycles.  
Remarks
 
Stability
After separation from cells: Ambient: Unacceptable, Refrigerated: 48 hours; Frozen: 1 year  
Reference Interval
20-51 mg/dL
Interpretive Data


See Compliance Statement D: www.aruplab.com/CS
Note
CPT Code(s)
86160
Components
Component Test Code*Component Chart Name
0051721Complement Factor B
* 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.
Cross References
  • Alternative Pathway - Complement
  • Complement alternative pathway
  • Properdin Factor B