Transfusions Are Associated With an Elevated Risk of Venous Thromboembolism and Periprosthetic Joint Infection Following Revision Total Knee Arthroplasty.

BACKGROUND

Blood transfusions have been associated with an increased risk of venous thromboembolism (VTE) and infectious complications following primary total joint arthroplasty. However, the thrombogenic and immunomodulatory effects associated with transfusions in the revision total knee arthroplasty (TKA) population have not been quantified. Accordingly, the present study sought to evaluate VTE and infectious complications between transfused and nontransfused patients following revision TKA.

METHODS

A national healthcare database was queried to identify patients undergoing aseptic both-component revision TKA from 2016 to 2023. Patients who received transfusions were matched to nonrecipients. Cohorts were balanced on patient demographics, comorbidities, postoperative VTE chemoprophylactic agents, tranexamic acid utilization, dexamethasone administration, and hospital characteristics. The 90-day risk of VTE complications, including deep vein thrombosis and pulmonary embolism (PE), and infectious complications, including periprosthetic joint infection, were assessed using multivariable logistic regression models. In total, 2,228 patients who received transfusions were 1:1 matched to 2,228 non-recipients who had good balance (standardized mean differences ˂0.10). Transfusion recipients and nonrecipients demonstrated an average age of 72 years and had similar rates of dexamethasone (57.0 versus 57.4%), tranexamic acid (64.8 versus 63.8%), aspirin (29.5 versus 28.5%), and low-molecular weight heparin utilization (29.7 versus 32.9%).

RESULTS

Patients who received transfusions demonstrated higher rates of PE (2.4 versus 1.4%, adjusted odds ratio (aOR): 1.79, 95% confidence interval (CI): 1.13 to 2.82, P = 0.013) and deep vein thrombosis (3.6 versus 2.0%, aOR: 1.89, 95% CI: 1.29 to 2.78, P = 0.001). Moreover, transfusion administration was associated with an increased risk of periprosthetic joint infection (5.3 versus 2.5%, aOR: 2.19, 95% CI: 1.57 to 3.00, P < 0.001).

CONCLUSIONS

Postoperative blood products are associated with markedly increased rates of PE and VTE and infectious complications following revision TKA. These data should inform blood conservation protocols and transfusion thresholds in this patient population.