Abstract
Background
Tranexamic acid (TXA) reduces blood loss and transfusion after total joint arthroplasty (TJA) but concerns remain that patients with severe medical comorbidities might be at increased risk for thromboembolic complications.
Questions/purposes
Among patients undergoing primary TJA with severe systemic medical disease, (1) was TXA associated with increased symptomatic thromboembolic events; (2) was TXA associated with decreased blood transfusion rates; and (3) were there differences in symptomatic thromboembolism or transfusions in the subset of patients with a history of, or risk factors for; thromboembolic disease?
Methods
We performed a retrospective review of 1131 primary TJAs in 1002 patients with American Society of Anesthesiologists score III or IV. Of these, 402 had at least one of seven risk factors for thromboembolic events and were designated as high risk; 240 of those patients received TXA. Outcome measures included 30-day postoperative symptomatic thromboembolic events and postoperative transfusion.
Results
There were no differences in symptomatic thromboembolic events within 30 days of surgery between patients who received TXA and those who did not (2.5% versus 2.6%, p = 0.97). Fewer patients treated with TXA received transfusions (11% with versus 41% without; p < 0.0001). In high-risk patients, TXA was not associated with an increase in symptomatic thromboembolic events (6.7% with versus 4.3% without; p = 0.27) and was associated with a decrease in transfusion rates (17% with versus 48% without; p = 0.001).
Conclusions
Although TXA seemed safe and effective in this database review of patients with severe medical comorbidities, a larger prospective trial is warranted to confirm these results.
Level of Evidence
Level III, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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Acknowledgments
We thank Robert T. Trousdale MD, for his assistance with this research and the following for their assistance in data analysis and verification: Christina Wood-Wentz MS, and Jordan Rosedahl BA, of the Division of Biomedical Statistics and Informatics as well as the staff of the Department of Transfusion Medicine.
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One of the authors (MWP) certifies that he has or may receive payments or benefits, in any one year, an amount in excess of USD 100,000 from DePuy (Warsaw, IN, USA), MAKO Surgical Corp (Ft Lauderdale, FL, USA), and Stryker Orthopaedics (Mahwah, NJ, USA). One or more of the authors (RJS) certifies that he has or may receive payments or benefits, in any one year, an amount in excess of USD 10,000 from Biomet Inc (Warsaw, IN, USA).
All ICMJE Conflict of Interest Forms for authors and Clinical Orthopaedics and Related Research editors and board members are on file with the publication and can be viewed on request.
Each author certifies that his or her institution approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.
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Whiting, D.R., Gillette, B.P., Duncan, C. et al. Preliminary Results Suggest Tranexamic Acid is Safe and Effective in Arthroplasty Patients with Severe Comorbidities. Clin Orthop Relat Res 472, 66–72 (2014). https://doi.org/10.1007/s11999-013-3134-0
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DOI: https://doi.org/10.1007/s11999-013-3134-0