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Anti-U1 RNP Ab (RDL)

CPT 86235
Synonyms
  • Anti-RNP

Test Details

Methodology

Enzyme-linked immunosorbent assay (ELISA)

Result Turnaround Time

5 - 7 days

Use

Anti-U1 RNP antibodies typically appear in both SLE and MCTD. In MCTD, the presence of U1 RNP is required for diagnosis, whereas anti-RNP antibodies occur in only 30-40% of SLE. MCTD is typified by the high-titer RNP antibody activity in isolation; anti-RNP antibody activity in SLE commonly accompanies anti-Sm antibodies.

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

Storage Instructions

Refrigerate or freeze.

Causes for Rejection

Grossly hemolyzed; bacterial contamination; lipemic specimen; icteric specimen; non-serum specimen types

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

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
520034 Anti-U1 RNP Ab (RDL) 53022-0 520035 Anti-U1 RNP Ab (RDL) Units 53022-0
Order Code520034
Order Code NameAnti-U1 RNP Ab (RDL)
Order Loinc53022-0
Result Code520035
Result Code NameAnti-U1 RNP Ab (RDL)
UofMUnits
Result LOINC53022-0