“…Meanwhile, all three stented grafts occluded after 8 weeks implantation may resulted from intimal hyperplasia or other factors. These results indicated that the external stents could maintain the straight vascular structure and While in recent decades, the product of eSVS (Kipsbay Medical Inc., MN, USA) has been studied in a number of randomized trials, which indicated that patency ratio of stented grafts was high in early times but decreased in the long-term observation (15,17,18,22). Studies on VEST (Vascular Graft Solutions LD, Tel Aviv, Israel), the newly designed stent, have shown that the intimal hyperplasia was dramatically reduced in stented grafts, while it had an equal effect on graft patency compared to non-stented grafts (19,20,37,38).…”