Heparin Anti-Xa

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Also known as: Anti-Xa; Xa inhibition; Antifactor Xa heparin; Heparin level
Formal name: Heparin Anti-Xa (pronounced “anti-ten-a”)
Related tests: aPTT; ACT

At a Glance

Why Get Tested?

To monitor low molecular weight heparin (LWMH) therapy and sometimes to monitor unfractionated heparin (UFH) therapy

When to Get Tested?

When you are being treated with LMWH or UFH and your doctor wants to monitor the amount of heparin in your blood

Sample Required?

A blood sample taken from a vein in your arm

Test Preparation Needed?

No test preparation is needed.