Anti-Thrombin (AT 3) Activity - Functional Test, Price, Normal Range | Sprint Diagnostics Hyderabad

Patient Preparing : No special preparation is needed. However, it’s important to inform your doctor about any medications or supplements you are taking as they might interfere with the test results.

₹ 3650


Anti-Thrombin (AT III) is a protein in the blood that plays a crucial role in the regulation of blood clotting. It inhibits thrombin and other enzymes involved in the coagulation process, which helps prevent the formation of excessive blood clots. The Anti-Thrombin Activity test measures the activity of the anti-thrombin protein in your blood, and it is functional, meaning it tests how well the anti-thrombin is working.

This test is particularly important for individuals who have a history of blood clots or are at risk for clotting disorders. It can help in the diagnosis of hereditary anti-thrombin deficiency, which is a disorder that can increase the risk of developing abnormal blood clots. Understanding and monitoring AT III activity levels are vital for the management and treatment of blood clotting disorders.

Test Name Anti-Thrombin (AT III) Activity - Functional
Sample Type Blood
Preparations Required No special preparation is needed. However, it’s important to inform your doctor about any medications or supplements you are taking as they might interfere with the test results.
Report Time 24 hours
Price in Hyderabad ₹ 3650

What is the purpose of the Anti-Thrombin (AT III) Activity test?

The Anti-Thrombin (AT III) Activity test is used to assess the activity of the anti-thrombin protein in the blood. This is important for diagnosing disorders associated with excessive clotting or bleeding and monitoring the effectiveness of anticoagulant therapy.

How is the Anti-Thrombin (AT III) Activity test performed?

A healthcare professional will take a blood sample from a vein in your arm. The sample is then sent to a laboratory where the activity of the anti-thrombin protein is measured.

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Why might a doctor order this test?

A doctor might order this test if you have a family history of clotting disorders, unexplained blood clotting, recurrent miscarriages, or if you are on anticoagulant therapy.

What does it mean if my Anti-Thrombin activity levels are low?

Low levels of Anti-Thrombin activity may indicate an inherited deficiency or an acquired condition that reduces the protein's levels or function. This can increase the risk of blood clots.

What does it mean if my Anti-Thrombin activity levels are high?

High levels are less common but might be associated with a low risk of clotting. This can be due to various factors including certain medications or liver dysfunction.

What are the normal ranges for Anti-Thrombin activity?

Normal ranges can vary, but generally, AT III activity levels between 80% and 120% are considered normal.

Is there any preparation required for the test?

No special preparation is needed for the test, but you should inform your doctor about any medications or supplements you are taking.

How often should I have this test done?

The frequency of this test depends on your health status and history. Your doctor will recommend how often you should have this test based on your specific situation.

Are there any risks associated with this blood test?

The risks associated with this blood test are minimal and include slight pain or bruising at the site where the needle was inserted.

Can medications affect the result of this test?

Yes, certain medications such as heparin, oral anticoagulants, and hormone replacement therapy can affect the results of this test. Inform your doctor of any medications you are taking.

What is the difference between Anti-Thrombin activity and Anti-Thrombin antigen tests?

Anti-Thrombin activity tests measure how well the protein is functioning, while Anti-Thrombin antigen tests measure the amount of the protein in the blood.

What are modifiable factors that can affect Anti-Thrombin levels?

Modifiable factors include medication use, diet, and lifestyle. For instance, vitamin K intake can affect clotting factors, and lifestyle changes like exercise can affect coagulation.

What are non-modifiable factors that can affect Anti-Thrombin levels?

Non-modifiable factors include genetics and certain medical conditions that affect the liver or kidneys.

Which doctor should I consult if my Anti-Thrombin activity levels are abnormal?

If your Anti-Thrombin activity levels are abnormal, it is advisable to consult a hematologist or your primary care doctor for further evaluation and guidance.

Can Anti-Thrombin activity levels change during pregnancy?

Yes, Anti-Thrombin activity levels can change during pregnancy. If you are pregnant and have a history of clotting disorders, your doctor may monitor your Anti-Thrombin levels closely.

Understanding your Anti-Thrombin activity levels can be critical in managing your health, especially if you are at risk for clotting disorders. Regular monitoring and adherence to your doctor’s advice are vital. This test is a valuable tool that can provide your doctor with information necessary for the diagnosis and management of blood clotting disorders.

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