摘要
血管支架径向支撑能力的评估方法主要有平面压缩法和径向压缩法两种。本文利用数值模拟进行比较分析发现,这两种方法对支架径向支撑能力测评具有一致性。还介绍了平面压缩法采用数值模拟和实验手段,研究了支架几何参数对支架径向支撑能力的影响,结果表明,在压缩初期径向支撑能力主要受金属覆盖率影响,到一定压缩量后,支撑能力会随膨胀直径的增加、壁厚和金属覆盖率的减小而显著减小。该结果对支架的设计和测评具有指导作用。
The radial support capacity of intravascular stent is usually evaluated by the planar compression or the radial compression methods. Based on FEM simulation, the planer and radial compression methods are compared, and the agreement of the evaluation for the radial support capacity between these two methods is found. Moreover, the planer compression method is used to study the geometric parameters＇ effect on the radial support capacity by numerical simulations and experiments. Results show that, at the beginning of the compression process, the radial support capacity is mainly influenced by the metal-to-artery surface ratio; at large compression rate, the radial support capacity will decrease sharply with the increment of post-expansion diameter and decrement of the thickness and metal-to-artery surface ratio. The results provide guidance to the design and test of stents.
出处
《中国医疗器械杂志》
CAS
2010年第3期175-179,共5页
Chinese Journal of Medical Instrumentation
关键词
血管支架
径向支撑能力
平面压缩法
intravascular stent, radial support capacity, planer compression method
