Ácido tranexámico endovenoso en el reemplazo total de rodilla sin manguito hemostático

Background: Total knee arthroplasty is associated with peri- and postoperative blood loss (600 to 1500 mL) and with blood transfusion rates of up to 50%. The objective is to study the effect of tranexamic acid in total knee arthroplasty without tourniquet, taking into account the blood loss in the postoperative period.Method:­ Patients were randomized into two groups: Group A, with tranexamic acid, 25 patients (71.5 years old) and Group B, without tranexamic acid, 25 patients (72 years old). Hemoglobin and hematocrit were evaluated prior to surgery and after 24, 48 and 72 hours. Drain- age was evaluated after 24 hours.Results:­ The postoperative hematocrit after 24, 48 and 72 hours was 33.4%, 31.5% and 30.8%, respectively, in Group A, and 28.5%, 27.9% and 27%, respectively, in Group B (p