Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.

Heparin-induced Thrombocytopenia PF4 Antibody

Print this article
Share this page:
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: Complete Blood Count, Platelet Count, Serotonin Release Assay, Heparin-induced Platelet Aggregation

Board approvedAll content on Lab Tests Online has been reviewed and approved by our Editorial Review Board.

At a Glance

Why Get Tested?

To detect antibodies against the anticoagulant heparin, to help diagnose immune-mediated heparin-induced thrombocytopenia (HIT II)

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 drawn from a vein in your arm

Test Preparation Needed?