Background and Objective : Chronic venous insufficiency ( CVI ) in lower limbs is one of common and frequently-occurring diseases in surgery, generally accompany with dilation or impaired function in communicating vein, which closely related to clinical manifestation of the patients. 背景与目的:下肢慢性静脉功能不全(CVI)是外科的常见病和多发病,常伴有下肢交通静脉扩张(VD)或功能不全,并且其程度与患者临床表现有关。