Original Paper THROMBO-PROPHYLAXIS IN TOTAL HIP ARTHROPLASTY USINGORAL ANTI-THROMBOTICS ANTICOAGULAT – RIVAROXABAN Popescu Gh. I. 1,2, Lupescu Olivera 1,2, Pătru Cristina 2, Nagea M. 2, Vasilache Cornelia 3,Dimitriu Al. 4, Macovei R. Al. 1,21 March 1, 2014