论文部分内容阅读
血管内支架是目前治疗心血管疾病的主要方法之一。但是支架植入后的血管再狭窄问题至今未获完全解决。研究表明,支架植入后导致的局部血流紊乱和流场异常是造成再狭窄的主要原因之一。基于动脉系统的旋动流原理,设计了一种能够引导血流产生旋动的血管内支架旋流导引装置,并用计算流体力学的方法,对其进行了优化设计。流场数值研究表明,优化设计得到的旋流导引装置可产生足够强度的旋动流。我们相信,该装置产生的旋动流可有效抑制支架结构对血流的扰动,从而达到减缓血管再狭窄的目的。
Endovascular stents are currently one of the main ways to treat cardiovascular disease. However, the problem of restenosis after stent implantation has not been completely solved yet. Studies have shown that local blood flow disorders and flow field abnormalities caused by stent implantation are one of the major causes of restenosis. Based on the principle of swirling flow in the arterial system, a swirling guide device of blood vessel stent that can guide the blood flow to swirl was designed and optimized by CFD method. The numerical study of flow field shows that the optimized swirl guiding device can generate swirling flow of sufficient strength. We believe that the swirling flow generated by the device can effectively restrain the disturbance of blood flow caused by the stent structure so as to reduce the restenosis of the blood vessel.