Selective Thromboembolism Prophylaxis After Arthroplasty

Selective anticoagulation group used anticoagulant once thromboelastography indicated hypercoagulable state. Conventional anticoagulation group used anticoagulant until one month after surgery routinely. The main difference was that the experimental group did not use anticoagulation if the thromboelastography indicated that the blood coagulation status was normal while the control group use anticoagulation routinely.