Complement Component Level 3A
Test Mnemonic
COMP3A
CPT Codes
- 86160 - QTY (1)
Performing Laboratory
National Jewish Health
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | EDTA (Lavender) | Frozen, Critical | Critical Frozen. Mix well. Centrifuge at room temperature within 30 minutes of collection, then transfer the plasma to a standard aliquot tube and freeze immediately on dry ice or at -70 degrees C. Separate specimens must be submitted when multiple tests are ordered. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Note: Preferred volume is 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | Frozen at -70 degrees C for 1 year |
| Ambient | Unacceptable |
| Refrigerated | Unacceptable |
Days Performed
First and Third Thu
Turnaround Time
22 - 24 days
Methodology
| Name | Description |
|---|---|
| Radioimmunoassay (RIA) |
Reference Range
| Comp C3A Level | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| 0 - 780 ng/mL |
Special Info
Critical Frozen. Thawed specimens or specimens stored at -20 degrees C are unacceptable. Plasma from an EDTA (lavender) tube is the only acceptable specimen type. Send frozen plasma Priority Overnight via FedEx in a well-insulated container on dry ice. Separate specimens must be submitted when multiple tests are ordered.