The Antithrombin III blood test has quite a few other names, like the Functional Antithrombin III test or the AT III test. When we bleed, our body naturally prepares a defense mechanism that prevents excessive blood loss. The process is known as clotting. There are clotting factors or proteins that regulate clotting and maintain blood flow in our blood vessels.
If the antithrombin level is lower than normal, you likely have an antithrombin deficiency. It puts you at an increased risk of developing DVT and other conditions, including:Phlebitis, or inflammation of the veins.Thrombophlebitis, or inflammation of the veins that causes a clot to form.A pulmonary embolus, or blood clotting in the lung.A heart attack if the blood clot travels to the arteries of the heart.A stroke if the blood clot travels to the arteries of the brain.
The Antithrombin III (ATIII) Plasma test: Analyzes the function and quantity of antithrombin in the blood. Antithrombin is a protein that is produced in the liver to help control blood clotting. Normally, when a blood vessel is injured, the body activates a series of coagulation factors in a process called the coagulation cascade, to form a blood clot and prevent further blood loss. Antithrombin helps to regulate this process by inhibiting the actions of several activated coagulation factors, chiefly thrombin, and factor Xa, to slow down the process and prevent excessive or inappropriate clotting.This Antithrombin III testing is also used when a person is not responding as expected to heparin anticoagulation and when unusually high doses of heparin are necessary to achieve the desired level of anticoagulation.
Antithrombin III (ATIII) Plasma test is prescribed by your doctor after completing the assessment of your condition.
80% - 120%
This test requires a blood sample.
This test can be taken at any time during the day.
Fasting is not required for this test.
There are no specific precautions for this test.
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