Effectiveness of four different strategies of preoperative using rivaroxaban in patients undergoing fast-tract total knee arthroplasty

INTERVENTION: A:rivaroxaban application, 1 Week, qd;B:rivaroxaban application, 2 Week, qd;C:rivaroxaban application, 3 Week, qd;D:rivaroxaban application, 35 Day, qd; CONDITION: end‐staged joint diseases PRIMARY OUTCOME: color Doppler Ultrasonic (CDU);thromboelastography;Routine coagulation tests; SECONDARY OUTCOME: ESR;CRP;incidence of ecchymosis;incidence of thromboembolism;The incidence of pulmonary embolism;major bleeding rate;Limb swelling;KSS;WOMAC; INCLUSION CRITERIA: 1. Primary unilateral total knee artropasty; 2. Patients with Knee osteoartritis or Rheumatoid arthritis; 3. Able and willing to provide signed informed consent.