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HelpTest Code LAB2870 C5 Nephritic Factor
Additional Codes
C5 Neph
Clinical System Name
C5 Nephritic Factor
Sample Requirements
Specimen: Whole Blood
Container(s): Red
Preferred Vol: 6.0 mL
Minimum Vol: 4.0 mL
Note: Draw blood in a Red top tube. Gold/SST (serum separator tubes) are not acceptable.
Processing Instructions
Reject due to: Gold/SST
Spin: Y
Aliquot: Y
Temp: -70 C
Storage Location: CRITICAL FROZEN. Spin blood roughly 30 minutes after collection, transfer 3.0 mL serum (Min. 1.0 mL) to a plastic aliquot tube affixed with large Epic label. Deliver specimen to the CPA -70 freezer, Send Outs rack. Serum should be frozen within ONE hour of blood draw.
Off-Site Collection: Spin blood roughly 30 minutes after collection, transfer 3.0 mL serum (Min. 1.0 mL) to a plastic tube affixed with large Epic label. Freeze at -70 C. Serum should be frozen within ONE hour of blood draw. Transport frozen.
Stability
| Specimen Type | Temperature | Time |
| Serum | Room temp | Unacceptable |
| Refrigerated | Unacceptable | |
| Frozen | Y |
Availability
| STAT | Performed | TAT |
| N | Daily | 4 w |
Performing Laboratory
The University of Iowa
Molecular Otolaryngology & Renal Research Laboratories (MORL)
285 Newton Rd, 5270 CBRB
Iowa City, IA 52242-1078
Phone: (319)-335-6623
Department
Department: Send Outs
Phone Number: (206) 987-2563
CPT Codes
86235, 86161
Methodology
Method: C3 Convertase Stabilizing Assay with Properdin (C3CSAP) measures the ability of C3Nefs to stabilize C3 convertase built with properdin on sheep erythrocytes. Stabilizing activities are reported as a function of hemolysis at 40 minutes.
Analytical Volume: 1.0 mL Serum
Limitations:
Reference Ranges
Interpretive report provided.
Send Out Instructions
| Reference Test Name: | C5 Nephritic Factor |
| Reference Lab Test Code: | C5Nef (C3CSAP) |
| Instructions | Ship Monday through Thursday via FedEx Priority Overnight. Saturday deliveries are not accepted. |