Naoum Joseph J, Arbid Elias J
The Methodist Hospital, Houston, Texas, USA.
Methodist Debakey Cardiovasc J. 2012 Oct-Dec;8(4):43-6. doi: 10.14797/mdcj-8-4-43.
Polytetrafluoroethylene (PTFE) grafts have proven to be an adequate alternative conduit for peripheral bypass operations. Whether or not one uses PTFE depends on several factors: surgeon preference, individual patient circumstances, or when autologous greater saphenous vein is not available or adequate. These conventional grafts have evolved and undergone modification. The intraluminal surface has been coated with carbon or bonded with heparin. The structure of grafts has been modified with the creation of a hood or cuff, with the incorporation of a stent-graft segment for a sutureless anastomosis, or the fusion of PTFE with an outer polyester layer to minimize suture hole bleeding. This evolution intends to limit graft thrombogenicity, ameliorate the formation of intimal hyperplasia, decrease complications, and improve overall graft patency.
聚四氟乙烯（PTFE）移植物已被证明是外周旁路手术中一种合适的替代管道。是否使用PTFE取决于几个因素：外科医生的偏好、患者的个体情况，或者自体大隐静脉不可用或不合适时。这些传统移植物已经得到改进并经历了改良。管腔内表面已涂覆碳或与肝素结合。移植物的结构已通过以下方式进行改良：创建一个罩或袖口，并入一个用于无缝合吻合的支架移植物段，或将PTFE与外部聚酯层融合以尽量减少缝合孔出血。这种改进旨在限制移植物的血栓形成性，改善内膜增生的形成，减少并发症，并提高移植物的总体通畅率。
