Tromboelastomeetria

Tromboelastography (TEG) is a laboratory test used to evaluate the clotting properties of blood. It measures the formation and breakdown of a blood clot in response to a standardized stimulus. The test provides a comprehensive assessment of the entire coagulation process, including the intrinsic and extrinsic pathways, as well as the fibrinolytic system.

TEG is performed by applying a small amount of blood to a rotor cup, which rotates at a constant speed. As the blood clots, it forms a fibrin mesh that is gradually removed by the rotor. The test measures the time it takes for the clot to form and the rate at which it is removed, providing a visual representation of the clotting process on a graph.

TEG results are expressed in terms of reaction time (R), clot formation time (K), alpha angle (α), maximum amplitude (MA), and lysis time (LT). These parameters reflect different aspects of the clotting process, such as the speed of clot formation, the strength of the clot, and the rate of clot breakdown.

TEG is commonly used to monitor anticoagulant therapy, assess bleeding risk, and diagnose and monitor coagulopathies. It is particularly useful in patients with inherited or acquired bleeding disorders, as well as those undergoing anticoagulant therapy for conditions such as atrial fibrillation or deep vein thrombosis. TEG can also be used to evaluate the effectiveness of hemostatic agents and to monitor the response to trauma or surgery.