- Patient Preparation
- Plain red or serum separator tube (SST).
- Specimen Preparation
- Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to ARUP Standard Transport Tube. (Min: 0.2 mL) Also acceptable: ACD or sodium citrated plasma.
- Storage/Transport Temperature
- CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Specimen may be stored refrigerated if tested within 48 hours.
Pediatric Transport: Ship on dry ice using overnight service.
- Unacceptable Conditions
- Heparinized specimens.
- Microbially contaminated, heat-inactivated, hemolyzed, icteric, or lipemic sera may give inconsistent results.
- After separation from cells: Ambient: Unacceptable; Refrigerated: 48 hours; Frozen: 1 month
For a clinical scoring system to assess pretest probability of HIT and other guidance for diagnosing HIT, refer to the Heparin-Associated Antibody Syndrome topic at arupconsult.com.
|Component Test Code*||Component Chart Name|
|0051052||Heparin-Induced Thrombocytopenia Abs PF4|
- Heparin Induced Antibodies
- Heparin PF4 Antibody
- Heparin-Asscociated Antibody
- HIT Antibodies
- HIT IgG, IgM, IgA
- HIT PF4 Antibodies
- Type II HIT