Complement Activity Enzyme Immunoassay, Total
0050198
 
Ordering Recommendation
Initial screening for suspected deficiency in the classical complement pathway.
Mnemonic
CH50
Methodology
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed
Mon-Fri
Reported
1-2 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Plain red.  
Specimen Preparation
Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Separator tubes. Specimens left to clot at 2-8°C. Specimens exposed to repeated freeze/thaw cycles. Non-frozen specimens.  
Remarks
 
Stability
After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks  
Reference Interval
Effective May 16, 2011

60-144 CAE Units
Interpretive Data
Note
CPT Code(s)
86162
Components
Component Test Code*Component Chart Name
0050198Complement Activity, Total EIA
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at interface.support@aruplab.com.
Cross References
  • CH100
  • CH50
  • Classic Complement Pathway Assessment-CH100
  • Complement CH100, Total
  • Total Complement CH100
  • Total Complement CH50