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Antithrombin
Also known as: Functional Antithrombin III, AT III
Formal name: Antithrombin, Activity and Antigen
Related tests: PTT, Coagulation factors, D-dimer, Fibrinogen, Homocysteine, Lupus Anticoagulant, Proteins C & S, PT, PT 20210, Factor V Leiden
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At A Glance
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Why get tested?To help investigate the cause of recurrent inappropriate blood clotting; to help diagnose an antithrombin deficiency
When to get tested?A couple of months after a thrombotic episode or if you are not responding as your doctor expected to heparin anticoagulation therapy
Sample required?A blood sample drawn from a vein in your arm
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This article was last reviewed on July 6, 2008
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