Heparin-induced Platelet Antibody With Reflex to Serotonin Release Assay
Also known as: Vaccine-Associated Coagulopathy, Vaccine-Induced Immune Thrombotic Thrombocytopenia, VITT Antibody Test
Use
See individual test descriptions for Heparin-induced Platelet Antibody (HIPA) [150075] and Heparin-dependent Platelet Antibody (Serotonin Release Assay) [150018].
Special Instructions
Specimens must be frozen and separate samples should be submitted for each test requested to avoid delays. Ensure that the serum is separated from red cells without microbial contamination or hemolysis.
Limitations
The test is sensitive to contamination, hemolysis, or improper sample preparation, which can lead to inaccurate results. Certain patients may have antibodies to heparin, even without thrombocytopenia or thrombotic complications, which may affect interpretive accuracy. Reflex testing is guided by initial test positivity and may delay final reporting if confirmatory testing is required.
Methodology
Other
Biomarkers
LOINC Codes
- 73818-7
- 77728-4
- 50727-7
- 66488-8
Result Turnaround Time
1-4 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL
Minimum Volume
1 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Transfer serum to a plastic transport tube. Submit separate frozen specimens for each test requested to avoid delays.
Storage Instructions
Freeze.
Causes for Rejection
Serum not separated from red cells; microbially contaminated, hemolyzed, lipemic, icteric, or heat-inactivated samples