下肢深静脉血栓(DVT)多由于手术创伤导致血管内皮损伤,血液高凝状态,长时间卧床等因素引起下肢血流缓慢,从而导致深静脉血栓形成。溶栓是下肢深静脉血栓的基础治疗,但鉴于溶栓过程中易出现栓子脱落,并可形成肺栓塞而危及生命,因此如何预防肺栓塞显得非常重要,常用方法为下腔 Lower extremity deep vein thrombosis (DVT) and more due to surgical trauma lead to vascular endothelial injury, hypercoagulability state, prolonged bed rest and other factors caused by slow blood flow in the lower limbs, leading to deep venous thrombosis. Thrombolysis is the basic treatment of deep venous thrombosis of the lower extremities, but in view of thrombosis prone to emboli off, and the formation of pulmonary embolism and life-threatening, so how to prevent pulmonary embolism is very important, commonly used method for the lower chamber