A number of novel oral anticoagulants that directly target factor Xa or thrombin have been developed in recent years. Rivaroxaban and apixaban (direct factor Xa inhibitors) and dabigatran etexilate (a direct thrombin inhibitor) have shown considerable promise in large-scale, randomised clinical studies for the management of thromboembolic disorders, and have been approved for clinical use in sp...

We performed a randomized dose-ranging study, double-blind for rivaroxaban doses and open-label for the comparator (low-molecular-weight heparin followed by vitamin K antagonists) to assess the optimal dose of rivaroxaban for the treatment of deep vein thrombosis. A total of 543 patients with acute deep-venous thrombosis received rivaroxaban 20, 30, or 40 mg once daily or comparator. Treatment ...

Protein S (PS) deficiency, an autosomal dominant hereditary thrombophilia, is more prevalent in East Asian populations than in Caucasians. PS-deficient patients have historically been administered a heparin product followed by warfarin for the treatment and secondary prevention of venous thromboembolism (VTE). However, warfarin can be ineffective or causes detrimental effects in rare cases. Whi...

Rivaroxaban has been recommended for routine use as a thromboprophylactic agent in patients undergoing lower-limb arthroplasty. However, trials supporting its use have not fully evaluated the risks of wound complications. This study of 1048 total hip/knee replacements records the rates of return to theatre and infection before and after the change from a low molecular weight heparin (tinzaparin...

V thromboembolism (VTE), comprising deep vein thrombosis (DVT) and pulmonary embolism (PE), commonly occurs both in patients in the community and during and following hospitalisation for surgery or acute medical illness. Patients undergoing major orthopaedic surgery have a particularly high risk. In the absence of thromboprophylaxis, DVT develops in 40–60% of patients undergoing total knee repl...

OBJECTIVES Venous thromboembolism (VTE) is a major potential complication following orthopaedic surgery. Subcutaneously administered enoxaparin has been used as the benchmark to reduce the incidence of VTE. However, concerns have been raised regarding the long-term administration of enoxaparin and its possible negative effects on bone healing and bone density with an increase of the risk of ost...

OBJECTIVES In Japan, low-dose rivaroxaban [15 mg QD/10 mg QD for creatinine clearance of 30-49 mL/min] was approved for clinical use in NVAF patients partly because of its unique pharmacokinetics in Japanese subjects. The aim of the study was to determine the anticoagulation intensity of rivaroxaban and its determinant factors in Japanese stroke patients. METHODS Consecutive stroke patients w...

BACKGROUND An effective and safe oral anticoagulant that needs no monitoring for dose adjustment is urgently needed for the treatment of diseases that require long-term anticoagulation. Rivaroxaban (BAY 59-7939) is an oral direct factor Xa inhibitor currently under clinical development. METHODS AND RESULTS This randomized, parallel-group phase II trial in patients with proximal deep-vein thro...

BACKGROUND Abdominoplasty, a commonly performed aesthetic procedure, is considered to have an increased risk of venous thromboembolism (VTE) events. At present, routine VTE chemoprophylaxis following abdominoplasty remains controversial. OBJECTIVES This study evaluates the authors' experience with rivaroxaban, an oral Factor Xa inhibitor, for VTE prophylaxis in abdominoplasty patients. METH...

Deep-vein thrombosis and subsequent pulmonary embolism are major complications in total joint arthroplasty of the lower limbs. New oral anticoagulants are increasingly prescribed as thromboprophylaxis due to their simple administration and encouraging phase III marketing studies. Patients, methods: In this observational study, we compared the efficacy and safety of rivaroxaban with nadroparin i...