C3 Nephritic Factor


Sunquest Code:C3NEF  
Epic Code:LAB6265Epic Name:Complement C3 Nephritic Factor
Methodology:Immunofixation electrophroesis
Turnaround Time:Specimens are sent to reference laboratory Mon-Thur; results are reported within 14 days.


Collection Instructions

Specimen:Blood
Optimal Volume:2 mL
Minimum\Peds Volume:0.7 mL
Container:Red (no gel)
Causes for Rejection:Thawed specimen. Samples stored at -20°C. Gel barrier tubes are not acceptable.


Processing and Shipping

Specimen Processing:Allow specimen to clot at room temperature for 20-60 minutes. Centrifuge and aliquot 1 mL, 0.25 mL minimum within 2 hours of collection or ASAP. Store on dry ice or at -70°C.
Shipping Instructions:Ship on dry ice.
Stability:1 year if frozen at -70°C.
Test Performed at or Referral Lab Lab Sendouts  (National Jewish Health)
Referral Lab number:C3NEF


Interpretive

Reference Range:
Normal Ratio is 0-0.26
Equivocal Ratio is 0.27-0.33
Positive Ratio is > 0.3
 
Use:This is not a direct measurement of antibody quality, but only a qualitative (indirect) measure of its activity in causing C3 conversion.


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