CAJ | 학술논문

狭窄率反映血管的堵塞程度,不同狭窄率对血管内支架力学性能的影响不同。利用有限元法对4种支架分别在30％,40％,50％的狭窄血管内进行力学性能模拟分析,研究狭窄率对支架变形行为和力学性能的影响。结果显示,狭窄率对支架的等效应力影响较小,而支架结构对血管内应力分布具有明显的影响,其中开环支架对血管内应力影响大于闭环支架；随着血管内狭窄率的升高,支架轴向缩短率呈减小的趋势、径向回弹率与扩张不均匀性呈增大的趋势,血管内等效应力具有增加的趋势；狭窄率对闭环支架径向回弹率与扩张不均匀性的影响比开环支架更显著。通过对狭窄率影响的分析,再现了不同堵塞程度血管对不同支架的影响,为支架的设计与植入提供理论依据。
협착솔반영혈관적도새정도,불동협착솔대혈관내지가역학성능적영향불동。이용유한원법대4충지가분별재30％,40％,50％적협착혈관내진행역학성능모의분석,연구협착솔대지가변형행위화역학성능적영향。결과현시,협착솔대지가적등효응력영향교소,이지가결구대혈관내응력분포구유명현적영향,기중개배지가대혈관내응력영향대우폐배지가；수착혈관내협착솔적승고,지가축향축단솔정감소적추세、경향회탄솔여확장불균균성정증대적추세,혈관내등효응력구유증가적추세；협착솔대폐배지가경향회탄솔여확장불균균성적영향비개배지가경현저。통과대협착솔영향적분석,재현료불동도새정도혈관대불동지가적영향,위지가적설계여식입제공이론의거。
Rate of stenosis reflects the level of vascular stenosis,different stenosis rate do different impact on mechanical properties of vascular stents.Going simulation and analysis using finite element method on four dif-ferent stents under the stenosed rate of 30%,40%,50%,investigate the effect of stenosis rate on stents’de-formation behavior and mechanical properties.Result shows:there was little effect on equivalent stress of stents which generated from stenosis rate,but the stents’structure exert an significant effect on stress distribution of blood vessels,the effect on vascular stress which open loop stents supported was obvious than the one closed loop stents supported;with the increase of stenosed rate,the axial shortening rate of stents have a tendency to decrease,radial spring-back rate and expansion uniformity have a tendency to increase,vascular stress have a tendency to increase too;the impact on closed loop stents'radial spring-back rate and expansion uniformity caused by stenosed rate was obvious than the one on open loop stents.By analyzing the influence caused by ste-nosed rate,showed the impact on different stents caused by different serious of blocked arteries,provided theo-retical basis for designing and implanting of the stent.