Test Details
Methodology
Enzyme-linked immunosorbent assay (ELISA)
Result Turnaround Time
5 - 7 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.
Use
Autoantibodies to La/SS-B antigen are detected by enzyme immunoassay in 70% to 90% of primary and about 50% of secondary Sjorgen's syndrome as well as 30% of SLE and 80% of subacute cutaneous lupus and a majority of infants with complete heart block.
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 Instructions
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 test on frozen samples, please submit separate frozen specimens for each test requested.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 14 days |
Frozen | 60 days |
Freeze/thaw cycles | Stable x1 |
Storage Instructions
Refrigerate or freeze.
Causes for Rejection
Grossly hemolyzed; bacterial contamination; lipemic specimen; icteric specimen; non-serum specimen types
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 520320 | Anti-La (SS-B) Ab (RDL) | 45142-7 | 520056 | Anti-La (SS-B) Ab (RDL) | Units | 45142-7 |
| Order Code | 520320 | |||||
| Order Code Name | Anti-La (SS-B) Ab (RDL) | |||||
| Order Loinc | 45142-7 | |||||
| Result Code | 520056 | |||||
| Result Code Name | Anti-La (SS-B) Ab (RDL) | |||||
| UofM | Units | |||||
| Result LOINC | 45142-7 |