Complement Component 4A
| Abbrev Code: | COMP4A | ||
| Order Code: | LAB6697 | Order Name: | Complement Component Level 4A |
| Synonyms: | COMP-4A; C4A | ||
| Methodology: | Radioimmunoassay | ||
| CPT Codes: | 86160 x1, 86160 x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Sat; results are reported within 18 days. | ||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2 mL |
| Minimum\Peds Volume: | 1.2 mL |
| Container: | Purple (EDTA) |
| Causes for Rejection: | Room temperature or refrigerated specimens. |
Processing and Shipping
| Specimen Processing: | Centrifuge and aliquot within 1 hour of collection, 1 mL, 0.5 mL minimum. Freeze at -70° C or on dry ice immediately. CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. |
| Shipping Instructions: | Ship on dry ice. |
| Stability: | Stable for 1 year if stored at -70°C. |
| Test Performed at or Referral Lab | Lab Sendouts (National Jewish Health) |
| Referral Lab number: | C4AR |
Interpretive
| Reference Range: | 0-2830 ng/mL |
| Use: | Follow-up test for complement activity screening when CH50 is low or absent and AH50 is normal and high suspicion remains for complement deficiency. |
Click HERE to Report test errors or omissions.
*If no email program is associated with this computer, please contact:
[email protected] for TestID: 5469"