Test Details
Methodology
RIPA Gel Radiography
Result Turnaround Time
14 - 21 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
U2 snRNP autoantibodies, known as a type of myositis-associated autoantibodies (MSAs) are frequently, but not exclusively, in patients with myositis. MSAs include autoantibodies to U1-RNP, U2-RNP, PM/SCL and Ku.
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.
Custom Additional Information
<5% of IIM; scleroderma/myositis overlap syndrome
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 tests 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 |
Reference Range
Negative
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 |
|---|---|---|---|---|---|---|
| 520024 | Anti-U2 RNP Ab (RDL) | 68549-5 | 520025 | Anti-U2 RNP Ab (RDL) | 68549-5 | |
| Order Code | 520024 | |||||
| Order Code Name | Anti-U2 RNP Ab (RDL) | |||||
| Order Loinc | 68549-5 | |||||
| Result Code | 520025 | |||||
| Result Code Name | Anti-U2 RNP Ab (RDL) | |||||
| UofM | ||||||
| Result LOINC | 68549-5 |