At a Glance
Why Get Tested?
To detect antibodies against the anticoagulant heparin, to help diagnose immune-mediated heparin-induced thrombocytopenia (HIT II). There is also a non-immune mediated HIT (type I) that occurs when heparin binds directly to platelets, causing activation; it is more common than type II but is transient and a milder form.
When to Get Tested?
A blood sample taken from a vein in your arm
Test Preparation Needed?