Background: Total knee arthroplasty (TKA) results in substantial postoperative blood loss with increased morbidity. Despite various studies proving the efficacy of tranexamic acid (TXA), no consensus exists on the routes of administration.
Methods: Seventy consecutive patients with knee arthritis undergoing simultaneous bilateral TKA, who were eligible and fulfilled the criteria, were taken up for this study. They were randomly allocated by a computer-generated random number table, either to receive intravenous TXA (IVTXA; group 1) or topical TXA (TTXA; group 2) in a prospective, double-blinded study. The primary outcome measures were total blood loss and total drain output. The secondary outcome measures were number of blood units transfused and clinical and functional outcomes as evaluated by the Knee Society Score, Western Ontario and McMaster Universities Arthritis Index score, visual analog score, and wound score.
Results: Both groups were similar in age, sex, and body mass index, and no statistical significance was observed. There was statistically significant difference between IVTXA and TTXA groups in mean postoperative total blood loss (P < .001), postoperative hemoglobin (P < .001) with a higher drop of hemoglobin in the former, total drain output (P < .001), and allogeneic blood transfusion (P < .001). No complication was observed in either group. Significant difference was observed in the Western Ontario and McMaster Universities Arthritis Index score at 12 weeks and 6 months (P = .015 and .007) and Knee Society Score at 6 and 12 months (P = .050 and .045, respectively). However, no significant difference was found at 6 weeks.
Conclusion: TTXA is better than IVTXA in reducing blood loss and clinical outcome after simultaneous bilateral TKA.
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