Objective:To investigate the effects of topical application of tranexamic acid for the blood loss after primary unilateral total knee arthroplasty.Methods:68 patients with osseous arthritis who had unilateral total knee arthroplasty were selected,they were divided into two groups with 34 cases in each:the A group:infusion of tranexamic acid,the B group:local perfusion of saline.Results:The A group compared with the B group,the difference of the postoperative 24 h,48h lead traffic and the postoperative 48 h ...