电脑建模的低密度脂蛋白积累在动脉分支后支架后的动脉分支
Nasrul H Johari1,2, Claudia Menichini1, Mohamad Hamady3
1Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, UK.
International journal for numerical methods in biomedical engineering
|September 20, 2023
概括
计算模拟显示,闭细胞支架增加了支架后动脉中低密度脂蛋白 (LDL) 的积累,与开细胞设计相比,增加了复缩的风险.
科学领域:
- 生物医学工程 生物医学工程
- 计算流体动力学的流体动力学.
- 心血管研究研究心血管研究
背景情况:
- 动脉支架 (CAS) 后的静脉与低壁剪压和动脉质脂蛋白积累有关.
- 低密度脂蛋白 (LDL) 的运输和沉积是发生静脉静脉复缩的关键因素.
研究的目的:
- 在CAS后计算评估LDL运输和积累在动脉分支中的LDL.
- 研究不同支架设计 (开放细胞与闭细胞) 对LDL沉积的影响.
主要方法:
- 开发了使用对流-扩散方程的合血流和LDL运输计算模型.
- 从CT扫描中创建了针对患者的頸動脈分叉模型,包括支架前后的几何形状.
- 在切割依赖的内皮通透性下模拟的LDL运输,用于开放和闭细胞支架设计.
主要成果:
- 在所有带有支架的动脉模型的远端区域观察到较高的LDL度.
- 发现LDL度在支架区域是20倍高的相比,相反的侧 Carotid 动脉.
- 与开放细胞支架相比,封闭细胞支架表现出较大的高LDL度区域.
结论:
- 支架设计显著影响LDL积累,闭细胞支架可能会增加复原风险.
- 计算建模为了解支架内静止机制和优化支架设计提供了有价值的工具.
- 需要对临床随访数据进行进一步的验证,以充分阐明支架设计在CAS结果中的作用.
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