Goal-directed vs. Empirical Tranexamic Acid Administrationin Cardiovascular Surgery

Tranexamic Acid Administration Strategies in Cardiovascular Surgery: Goal-directed Tranexamic Acid Administration Based on Viscoelastic Test vs. Empirical Tranexamic Acid Administration

The present study is a multi-center randomized prospective placebo-controlled non-inferiority trial. The study's primary objective is to compare the amounts of postoperative bleeding using two different TXA administration strategies: empirical TXA administration vs. viscoelastic test-based goal-directed TXA administration in cardiovascular surgery. The secondary objectives include comparing the incidents of hyper-fibrinolysis, thromboembolic complications, and postoperative seizures. Researchers assumed that goal-directed tranexamic acid (TXA) administration using viscoelastic field tests would not be inferior to the empirical TXA administration strategy in reducing postoperative bleeding and hyper-fibrinolysis. It also would be beneficial in lowering TXA-induced thromboembolic complications and seizures.

The present study is a multi-center randomized prospective placebo-controlled non-inferiority trial. This study's primary objective is to compare the amounts of postoperative bleeding during postoperative 24 hours through chest tube drainage using two different tranexamic acid (TXA) administration strategies: empirical TXA administration vs. viscoelastic test-based goal-directed TXA administration in cardiovascular surgery. The secondary objectives include determining the inter-group differences in hyper-fibrinolysis, thromboembolic complications, and postoperative seizures. Researchers hypothesized that goal-directed TXA administration using viscoelastic field tests would not be inferior to the empirical TXA administration strategy in reducing postoperative bleeding and hyper-fibrinolysis. Researchers also expect that goal-directed TXA administration would be beneficial in lowering TXA-induced thromboembolic complications and seizure risks.

Heart Diseases, Vascular Diseases, Transfusion Related Complication, Coagulation Disorder, Blood, Fibrinolysis; Hemorrhage

Tranexamic acid administration, regardless of the result of rotational thromboelastometry. Placebo administration, at LI60 < 85 % or A10< 40 mm in EXTEM of rotational thromboelastometry

Tranexamic acid administration, regardless of the result of rotational thromboelastometry. Placebo discard, at LI60 ≥ 85% or A10 ≥ 40 mm in EXTEM of rotational thromboelastometry

Placebo administration, regardless of the result of rotational thromboelastometry. Tranexamic acid administration at LI60 < 85 % or A10 < 40 mm in EXTEM of rotational thromboelastometry

Placebo administration, regardless of the result of rotational thromboelastometry. Tranexamic acid discard at LI60 ≥ 85% or A10 ≥ 40 mm in EXTEM of rotational thromboelastometry

values of intraoperative CT-EXTEM, CFT-EXTEM, A10-EXTEM, MCF-EXTEM, ML-EXTEM, CT-FIBTEM, CFT-FIBTEM, A10-FIBTEM, MCF-FIBTEM, ML-FIBTEM in rotational thromboelastometry

incidence of postoperative myocardia infarction, stroke, pulmonary embolism, gut infarction till the hospital discharge

Inclusion Criteria: patients who will undergo elective cardiovascular surgery employing cardiopulmonary bypass patients who provide written informed consent Exclusion Criteria: pregnancy refusal of allogenic blood transfusion taking thrombin history of thromboembolic and familial hypercoagulability disease recent history of myocardial infarction or ischemic cerebral infarction (within 90 days) hypersensitive to TXA histroy of convulsion or epilepsy taking hemodialysis history of Heparin-induced thrombocytopenia