Complement C1q, Quantitative
Use
This test is used as an aid in the diagnosis and treatment of systemic lupus erythematosus (SLE).
Special Instructions
State patient's sex on the request form when ordering this test.
Limitations
Plasma should be avoided for this test as fibrin might cause nonspecific precipitation, leading to incorrect interpretation. It is essential to handle the specimen properly to avoid chylous or lipemic serum, hemolysis, or gross bacterial contamination, all of which could invalidate the results. Repeat testing may not be possible if only the minimum volume of 0.1 mL is provided, as additional testing would require more serum.
Methodology
Immunoassay (Radial immunodiffusion (RID))
Biomarkers
LOINC Codes
- 4478-4
- 4478-4
Result Turnaround Time
7-11 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.1 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Separate serum from cells.
Storage Instructions
Room temperature
Causes for Rejection
Chylous or lipemic serum; hemolysis; gross bacterial contamination. Plasma should be avoided since fibrin may result in the appearance of nonspecific precipitation, which may adversely affect interpretation.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |