Heparin-induced Thrombocytopenia Antibody

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Also known as: Heparin-PF4 Antibody; HIT Antibody; HIT PF4 Antibody; Heparin Induced Antibody; Heparin Associated Antibody
Formal name: Heparin-induced Thrombocytopenia Platelet Factor 4 Antibody
Related tests: FBC; Platelet Count; Serotonin Release Assay; Heparin-induced Platelet Aggregation

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?

When you are receiving heparin therapy and your platelet count significantly decreases (thrombocytopenia), especially when you also have new blood clots (thrombosis)

Sample Required?

A blood sample taken from a vein in your arm

Test Preparation Needed?

None