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Subject: Thromboelastogram (TEG)
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TEG uses equipment (TEG analyzer) that records the process of blood coagulation, including fibrinolysis and platelet defects. It measures in vitro the kinetics of clot formation and dissolution by a mechanical process, which monitors very low shear elasticity changes. The different parameters represent different aspects of the patient's hemostasis.
The TEG is commonly used for cardiac bypass surgery, providing a rapid assessment of anticoagulation (heparin), restoration of coagulation with the use of protamine sulfate, excess fibrinolysis, and platelet function during the procedure.
Its usefulness has been demonstrated since it reduces the number of red cell or platelet transfused during open heart surgery or shortly after its termination.