Intravenous administration of tranexamic acid in total hip arthroplasty does not change the blood coagulopathy: a prospective thrombelastography analysis oleh Xing-chen Zhang, Ma-ji Sun, Sheng Pan, Min Rui, Feng-chao Zhao, Guo-chun Zha, Yong Pang, Xin Zheng, Kai-jin Guo