The feet-down tilt position and high CO2 pneumoperitoneum pressure can interfere with the recirculation of blood,and could increase the risk of deep vein thrombosis after laparoscopy.

• 头高脚低位及高CO2气腹压均可使血液回流不畅，导致术后下肢深静脉血栓发生的风险可能增加。