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The Use of Tranexamic Acid in Hip Fracture Surgery-A Systematic Review and Meta-analysis
Christabel Agius1,2, Elaine Cole2, Mary Grace Mifsud1
1Department of Orthopaedic Surgery, Trauma & Sports Medicine, Mater Dei Hospital, Msida, Malta.
Objectives:
To analyze the effect of intravenous tranexamic acid (TXA) on blood transfusion requirements in adult patients undergoing hip fracture surgery. Secondary aim was to evaluate the safety by assessing thromboembolic events.
Data Sources:
Cochrane Central Register of Controlled Trials, Medline, PubMed, and Embase were searched for randomized controlled trials published in English from 2010.
Study Selection:
Studies eligible for inclusion were randomized controlled trials that analyzed the use of intravenous TXA on blood transfusion requirement in hip fracture surgery.
Data Extraction:
Titles and abstracts were screened and assessed for eligibility by 2 independent reviewers. Quality and risk of bias was assessed using the Grading of Recommendations Assessment, Development, and Evaluation approach and the Cochrane risk-of-bias tool (RoB2).
Data Synthesis:
Meta-analysis with random and fixed effect models was performed. Risk ratio (RR) was calculated for dichotomous outcomes and estimated with a 95% confidence interval (CI). For continuous data, the risk difference (RD) was estimated with a 95% CI.
Results:
A total of 13 trials involving 1194 patients were included. Pooled results showed that patients in the TXA group had significantly lower transfusion requirements (RR 0.50, 95%CI 0.30-0.84, P = 0.009). Similar findings were observed in the subcohort of patients with transfusion threshold of Hb < 8g/dL, (RR 0.42, 95%CI 0.31-0.56, P < 0.0001). This risk reduction was not observed in the subcohort of patients with transfusion threshold of Hb 8.1-10g/dL who received TXA (RR 0.77, 95%CI 0.51-1.18, P = 0.23) and no statistically significant differences were found for total thromboembolic events (RR 0.01, 95%CI -0.02-0.04, P = 0.47).
Conclusion:
This meta-analysis demonstrated that intravenous TXA reduced blood transfusion rates and did not increase the risk of thromboembolic events.
Level Of Evidence:
Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.
