ANTI THROMBIN III ANTIGEN

The ANTI THROMBIN III ANTIGEN test measures the concentration of antithrombin III (ATIII) — a key liver-produced protein that helps regulate blood coagulation by inhibiting thrombin and other clotting enzymes. The assay uses an immunoassay on citrated plasma to quantify ATIII protein levels, helping identify quantitative (type I) deficiencies that raise thrombosis risk.

This test is useful for evaluating patients with unexplained or recurrent venous thromboembolism, a family history of thrombophilia, pregnancy complications related to clotting, or prior to major surgery or estrogen therapy. Clinicians often request both antigen and functional ATIII assays together, since antigen testing detects reduced protein levels while functional tests assess inhibitory activity; at-home sample collection across Dubai and the UAE makes testing convenient while samples are processed in accredited UAE laboratories for reliable reporting.

• Antithrombin III (ATIII) Antigen
• Antithrombin Functional Activity
• Sample Type: Citrated Plasma

• Unexplained or recurrent deep vein thrombosis or pulmonary embolism
• Strong family history of thrombophilia or early clotting events
• Recurrent pregnancy loss or placental insufficiency suspected from clotting disorders
• Before major surgery or when starting estrogen-containing therapies
• Monitoring response to ATIII replacement therapy or anticoagulation management

• Convenient at-home blood draw by licensed phlebotomists across Dubai and the UAE
• Accredited laboratory analysis with clinically validated immunoassays
• Helps identify quantitative ATIII deficiency to guide thrombosis risk management
• Faster turnaround and clear results to support clinical decision-making
• Supports pregnancy and pre-surgical risk assessment with local healthcare standards

• At-home venous blood collection into a citrate tube by a trained phlebotomist
• No fasting required; stay well hydrated before sample collection
• Inform the phlebotomist and ordering physician about anticoagulant use (heparin, LMWH, warfarin, DOACs)
• Provide accurate clinical history and any family thrombosis history for proper interpretation