Complement C3 and C4
Order Name
C3/C4
Test Number: 5002000
Revision Date 02/26/2018
Test Number: 5002000
Revision Date 02/26/2018
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Complement C3, Serum
|
Turbidometric | 4485-9 |
|
Complement C4, Serum
|
Turbidometric | 4498-2 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 3 mL (1) | Serum | Clot Activator SST | Refrigerated or Frozen |
| Alternate 1 | 3 mL (1) | Serum | Clot Activator (Red Top, No-Gel) | Refrigerated or Frozen |
| Instructions | Separate serum from cells within one hour of collection. Stability: Room Temperature N/A, Refrigerated 7 days, Frozen 8 days. If ordering C3/C4 with CH50, Please Collect a Red No-Gel Clot tube, freeze two separate individual aliquots for C3/C4 and CH50. (avoid repeated freeze/thaw cycles). |
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| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Mon - Sat |
| Expected TAT | 3 Days |
| Clinical Use | Low levels of C3 and/or C4 may occur during infections, exacerbation of SLE, glomerulonephritis and immune complex disease. |
| CPT Code(s) | 86160X2 |
| Lab Section | Immunology - Serology |