At a Glance
Why Get Tested?
To help investigate the cause of recurrent or inappropriate blood clotting; to help diagnose an antithrombin deficiency
When to Get Tested?
Preferably a couple of months after a thrombotic episode and not whilst taking, or for at least 6 weeks after taking anticoagulants. Occasionally testing may be requested if you are not responding as your doctor expected to heparin anticoagulation therapy
A blood sample taken from a vein in your arm
Test Preparation Needed?
No test preparation is needed.