Antithrombin iii

This is an important test to help diagnose unexplained blood clotting or atypical response to blood thinner heparin.

Venous blood
1 tests included
5 days turnaround



About Antithrombin iii

What is antithrombin III?

Antithrombin III is a protein produced by the liver involved with regulating blood clotting through preventing coagulation. It is sometimes administered to reduce clotting during operations. Antithrombin III deficiency can be either hereditary or acquired and usually presents as blood clots in the veins (thrombosis). Antithrombin III is the target for blood thinning medication heparin, atypical response to heparin can indicate a deficiency. 

Problems associated with abnormal antithrombin III include thrombosis, phlebitis and pulmonary embolism. 

Why take the test?

This test measures antithrombin III functionality and quantity in the blood. It is used to diagnose unexplained blood clotting or atypical response to blood thinner heparin. 

What's tested

Clotting Status

How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.