Synonyms
- ACV
- Anti-Citrullinated Vimentin
- SA
- Vimentin
Test Includes
This test is a component of RAdx5, SeroNegRAdx3.
Expected Turnaround Time
7 - 10 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
For more information, please view the literature below.
Rheumatoid Arthritis: Novel Serologic Markers White Paper
Rheumatoid Arthritis Testing With Better Performance Brochure
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.3 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube or gel-barrier tube
Collection
Separate serum from cells within one hour of collection. Transfer to a plastic transport tube before shipping. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Storage Instructions
Refrigerate or freeze.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 14 days |
Frozen | 60 days |
Freeze/thaw cycles | Stable x1 |
Causes for Rejection
Grossly hemolyzed; bacterial contamination; lipemic specimen; icteric specimen; non-serum specimen types
Test Details
Use
Anti-Citrullinated Vimentin (Sa) antibodies are highly specific for rheumatoid arthritis (RA). They are found in early polyarthritis, can identify patients that are anti-CCP and IgM-RF antibody-negative, and predict a more aggressive RA disease course. Disappearance of anti-Sa IgG antibodies 3 months after initiation of treatment is associated with less radiographic progression.
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
Methodology
Enzyme-linked immunosorbent assay (ELISA)
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 520081 | Anti-Sa Ab, IgG (RDL) | 54022-9 | 520096 | Anti-Sa Ab, IgG (RDL) | Units | 54022-9 |
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