Lee J M, Wilson G J
Biomaterials. 1986 Nov;7(6):423-31. doi: 10.1016/0142-9612(86)90029-3.
Mechanical matching of vascular grafts and host vessels has been suggested to be important in determining graft patency rates. In this context, we have examined the anisotropic viscoelastic properties of natural vessels and some synthetic replacements using low strain rate tensile testing of circumferential and longitudinal strips. The canine iliac artery and iliac vein were compared with 6 mm diameter woven and knitted Dacron grafts, expanded polytetrafluoroethylene (PTFE) grafts, and helically constructed prototype polyurethane grafts at wrap angles of 45, 60 and 75 degrees. A thick-walled pressure vessel analysis was used to approximate physiological stress levels, and SEM was used to correlate anisotropic properties with graft wall structure.
血管移植物与宿主血管的机械匹配被认为在决定移植物通畅率方面很重要。在此背景下，我们通过对周向和纵向条带进行低应变率拉伸试验，研究了天然血管和一些合成替代物的各向异性粘弹性特性。将犬髂动脉和髂静脉与直径6毫米的机织和针织涤纶移植物、膨体聚四氟乙烯（PTFE）移植物以及缠绕角度为45度、60度和75度的螺旋结构原型聚氨酯移植物进行了比较。采用厚壁压力容器分析来估算生理应力水平，并使用扫描电子显微镜（SEM）将各向异性特性与移植物壁结构相关联。
