C3 Nephritic Factor

Abbrev Code:C3NEF   
Order Code:LAB6265Order Name:Complement C3 Nephritic Factor
Methodology:Immunofixation electrophoresis
CPT Codes: 86161 x1
Turnaround Time:Specimens are sent to reference laboratory Mon-Thur; results are reported within 14 days.

Collection Instructions

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:C3NF


Reference Range:
Normal Ratio is 0-0.26
Equivocal Ratio is 0.27-0.33
Positive Ratio is > 0.34
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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