The Efficacy Comparison of Tranexamic Acid for Reducing Blood Loss in Total Knee Arthroplasty at Different Dosage Time.

Background: This study aimed to compare the efficacy of intravenous administration of tranexamic acid for reducing blood loss in total knee arthroplasty at different dosage time. Methods: From February 2013 to December 2015, a total of 180 patients (47 in male and 133 in female) who were planned to undergo total knee arthroplasty in our trauma center were recorded. Based on dosage time of tranexamic acid administration, participants were divided into groups A, B, C, and D randomly. In groups A, B, and C, tranexamic acid (30 mg/kg) was infused intravenously 15 minutes before or after tourniquet inflation or on tourniquet deflation respectively, tranexamic acid was not applied in group D. Total blood loss (intraoperative and postoperative blood loss), blood transfusion rate and volume, hemoglobin level, and incidence of deep vein thrombosis were recorded and analyzed. Results: Compared with groups B, C, and D, there were significant reduction of blood loss, hemoglobin, and blood transfusion rate in group A (P < .05). Besides, there was no significant difference between groups B and C with superior efficacy than group D. Conclusion: Intravenous administration of tranexamic acid before tourniquet inflation was superior in terms of hemoglobin reduction, reducing blood loss and blood transfusion rate. (C) 2016 Elsevier Inc. All rights reserved.