Antithrombin III : Normal Values & Results (A-Th3, AT III)

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You are here : AllRefer.com > Health > Tests & Exams > Antithrombin III : Normal Values & Results

Antithrombin III

Alternate Names : A-Th3, AT III

Normal Values

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What do Abnormal Results Mean?

Lower-than-normal AT III may mean you have an increased risk of clotting. Abnormal results may not show up until you are an adult.

Examples of disorders and conditions associated with increased blood clotting include:

Deep venous thrombosis
Phlebitis (vein inflammation)
Pulmonary embolus (blood clot traveling to lung)

Lower than normal AT III may be due to:

Bone marrow transplant
DIC (disseminated intravascular coagulation)
Other coagulation disorders
An inherited condition causing lower blood clotting protein levels
Liver disorders
Nephrotic syndrome

Higher than normal AT III may be due to:

Use of anabolic steroids

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Antithrombin III : Definition
Antithrombin III : Why is the Test Performed?
Antithrombin III : How is the Test Performed?
Antithrombin III : How to Prepare for the Test?
Antithrombin III : How will the Test Feel?
Antithrombin III : Risks
Antithrombin III : Special Considerations
Antithrombin III : Normal Values
Antithrombin III : What do Abnormal Results Mean?

Review Date : 6/10/2008
Reviewed By : Sean O. Stitham, MD, private practice in Internal Medicine, Seattle, Washington; and James R. Mason, MD, Oncologist, Director, Blood and Marrow Transplantation Program and Stem Cell Processing Lab, Scripps Clinic, Torrey Pines, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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