Thromboprophylaxis and Incidence of Venous Thromboembolism in Patients With Hemophilia A or B Who Underwent High-Risk Orthopedic Surgeries. 
Total hip replacement (THR) and total knee arthroplasty (TKA) carry a high risk of postoperative venous thromboembolism (VTE); therefore, anticoagulation prophylaxis is recommended in these patients.  Unfortunately, there are no guidelines about VTE prophylaxis in patients with hemophilia who underwent these high-risk surgeries.  To determine whether these patients have high risk of VTE, we conducted a retrospective study on patients with hemophilia who underwent elective THR/TKA at our institute from 2004 to 2012.  Postoperatively, we collected information on duration and method of factor VIII/IX infusion, VTE-prophylaxis, and complications.  There were 23 patients with hemophilia, 18 (78%) with hemophilia A and 5 (22%) with hemophilia B, who underwent high-risk surgeries (39% THR and 61% TKA).  The VTE prophylaxis included sequential compression device, 12 (52%), and prophylactic enoxaparin, 1 (4%).  Ten (43%) patients did not receive VTE prophylaxis.  At 1-year follow-up, we did not find any evidence of clinical VTE in our patients.  Better risk stratification is needed to identify patients who would benefit from pharmacological prophylaxis.