Purpose: The purpose of the study is to determine the efficacy and safety of postoperative single-dose anticoagulant treatment in preventing venous thromboembolism (VTE) after revision THA, in comparison with a multiple-dose chemoprophylaxis protocol.
Methods: We retrospectively compared 295 patients undergoing revision THA who received multiple-dose chemoprophylaxis protocol (40 mg low-molecular-weight heparin once and oral rivaroxaban for 10 days) or single-dose chemoprophylaxis protocol (40 mg low-molecular-weight heparin once) for VTE. The patients in both groups performed active lower limb exercises. Each group was further stratified into subgroups based on the aetiology of revision. The incidence of VTE, wound complications within three months, hidden blood loss (HBL), transfusion rate, and surgical drainage duration were recorded.
Results: The incidence rates of VTE (P = 0.870) did not differ between the two prophylaxis protocols. However, significant differences were observed in wound complications within three months (P = 0.002), HBL (P = 0.015), transfusion rate (P = 0.028). Surgical drainage duration was also shorter in the single-dose chemoprophylaxis group (P = 0.0023). In the subgroup analysis, the use of single-dose chemoprophylaxis protocol cannot significantly reduce HBL and transfusion rate after septic revision THA. The use of multiple-dose chemoprophylaxis protocol (OR = 2.89, P = 0.002) and high BMI (OR = 1.09, P = 0.037) were independent risk factors of wound complications.
Conclusions: Single-dose chemoprophylaxis protocol effectively and safely prevented VTE after revision THA compared with multiple-dose chemoprophylaxis protocol. The effect in reducing HBL and postoperative transfusion rate was limited in septic revision.
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