双大隐静脉：定义问题和治疗意义

In the literature there is a range from 1% to 20 % of duplication (up to 20%) of the great saphenous vein (GSV) reported, because there is a lack of an accurate definition of the GSV and objective parameters for an anatomical identification.

To investigate the frequency of true duplications of the GSV.

A systematic review of the literature, a retrospective analysis of duplex examinations, and a prospective study of duplex examinations to investigate the frequency of true duplications of the GSV.

In the literature review, a great variety of definitions is used for duplication of the GSV. Before the consensus of the Union International de Phl