The investigators believe the use of hemostatic agent topically in patients with high risk of thromboembolism can avoid its systematic effect and decrease its potential perioperative risk of thromboembolic complications (arterial thrombosis, myocardial infarction and pulmonary embolism). On the other hand, thrombin-based hemostatic agents, Tisseel®, have been widely used in surgical procedure including gynecology, general surgery, and orthopedics which were still attracting the attention and interest of multitudinous surgeons. Some recent studies demonstrated that topic use of Tisseel® in primary TKA can reduce hemoglobin decline and calculated total blood loss after TKA and is not related to adverse reactions or complications such as wound infection, venous thromboembolism events(VTE). But there were another studies showed Tisseel® does not reduce blood loss in TKA procedures.