ARUP's Laboratory Test Directory
| 0050746: Striated Muscle Antibody, IgG with Reflex to Titer |
| Test Mnemonic: STM R | |
|
Methodology: Indirect Fluorescent Antibody
Performed: Mon-Fri Reported: 1-5 days |
| Specimen Required: | |
|
Collect: One 4 mL SST.
Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.15 mL serum at 2-8°C. Remarks: Separate serum from cells ASAP. Unacceptable Conditions: Plasma. Severely lipemic, contaminated, or hemolyzed specimens. Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) |
|
| Reference Interval: |
|
Screen: < 1:40 No antibody detected. Titer: < 1:40 No antibody detected. |
| Note: | |
| Titers greater than or equal to 1:80 are suggestive of myasthenia; however, striated muscle antibody can be found in rheumatic fever, myocardial infarction, and a variety of post-cardiotomy states. All positives will be titered to endpoint. If Striated Muscle Ab is >1:40, then a titer will be added. |
| CPT Code(s): | |
| 86255 Striated muscle; if reflexed, add 86256 Striated muscle titer |