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Comparison of Intraarticular Versus Combined Intravenous and Intraarticular Tranexamic Acid Administration in Patients Undergoing Primary Unilateral Total Knee Arthroplasty: A Randomized Controlled Trial in the Middle Eastern Patient Population.

BACKGROUND: This study aimed to determine whether combined intravenous (IV) and intraarticular (IA) tranexamic acid (TXA) reduces blood loss and the requirement of blood transfusion compared to IA use alone in the middle eastern patients undergoing primary cemented unilateral total knee arthroplasty (TKA).

METHODS: The present study is a double-blind randomized controlled trial (RTC) comparing the efficacy of IA alone to combined IA and IV routes of TXA administration in patients undergoing primary cemented TKA using a tourniquet performed by two senior surgeons. There were 21 patients in the IA alone and 29 in the combined group. The primary outcome measure was blood transfusion requirement, hemoglobin drop, and the total estimated blood loss on day three of postoperative period. The secondary outcomes were complications including thromboembolic events, wound complications, periprosthetic infection, patient-reported outcomes (PROs) of pain visual analog scale (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and EuroQol 5-dimension (EQ-5D) as well as the range of motion (ROM) at one-year follow-up.

RESULTS: None of the patients in either of the comparison group required blood transfusion in the perioperative period. The drop in hemoglobin levels (2.1±1.0 vs. 2.2±1.1, P = 0.84) and the total estimated blood loss (884±489 vs. 877±324, P = 0.96) on the third postoperative day in the IA alone group showed no statistically significant difference compared to that in the combined group. Moreover, there were no complications noted in patients of either group. At one-year follow-up, there was no significant difference between the two comparison groups regarding the mean PROs of pain VAS, WOMAC, and EQ-5D, as well as ROM.

CONCLUSION: According to the obtained results, this RCT in the middle eastern patient population found no additional benefit of TXA administration through combined IV and IA route over the IA alone in reducing the requirement of blood transfusion and the total blood loss. Further similar studies with larger sample sizes are needed to ascertain the ideal route of TXA administration in patients undergoing primary TKA.

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