For the cases treated with posterior approach, 21 cases were treated with vein bypass and 6 were treated using a prosthetic bypass. Of the 21 cases treated with vein bypass, 20 used the long saphenous vein. The short saphenous vein was used as a bypass material in the remaining case.
As for the cases performed by the medial approach, 14 were treated with a long saphenous vein as the bypass material and six were treated using a prosthetic bypass. (PTEFE and Dacron).