Complement C5
Test Mnemonic
COMPC5
CPT Codes
- 86160 - QTY (1)
LOINC ®
4505-4
Aliases
- C5 Total
Performing Laboratory
ARUP
FDA Category
Analyte Specific Reagent
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Frozen, Critical | CRITICAL FROZEN. Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube. Freeze immediately. Separate specimens must be submitted when multiple tests are ordered. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.3 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | After separation from cells: 2 weeks (Avoid repeated freeze/thaw cycles) |
| Ambient | After separation from cells: 2 hours |
| Refrigerated | After separation from cells: Unacceptable |
Days Performed
Tue, Fri
Turnaround Time
4 - 9 days
Methodology
| Name | Description |
|---|---|
| Radial Immunodiffusion (RID) |
Reference Range
| Complement C5 | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | 7 - 20 | mg/dL |
Special Info
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Non-frozen specimens will be rejected. Specimens left to clot at refrigerated temperature and specimens exposed to repeated freeze/thaw cycles are unacceptable. This test is New York DOH approved.
Clinical Info
Used as a follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.