C3 Nephritic Factor
Test Code
C3NF
Description
Collect
Serum from a plain red top is the only acceptable sample type.
Gel barrier tubes are not acceptable.
Pediatric Collection
Minimum volume: 250 µL serum, frozen
Unacceptable Conditions
Thawed specimen.
Storage Transport Temp
Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Frozen at -70°C: 1 year
Notes
This is not a direct measurement of antibody quality, but only a qualitative (indirect) measure of its activity in causing C3 conversion.
Methodology
Immunofixation Electrophoresis
Turnaround Time
14 Business days
Department
Complement Lab
Synonyms
Complement (C3 Nephritic Factor);2-D Immunoelectrophoresis (C3 Nephritic Factor)
Reference Interval
Normal – Ratio is 0 – 0.26
Equivocal – Ratio is 0.27 – 0.33
Positive – Ratio is > 0.34
No male or female
CPT Code
86161