在内动脉瘤壁细分区的局部血液动力学环境的描述
Yogesh Karnam1, Fernando Mut1, Alexander K Yu2
1Department of Bioengineering, George Mason University, Fairfax, Virginia, USA.
概括
内动力学条件在内动脉瘤 (IAs) 中影响了血栓的发育. 低和高壁切削应力 (WSS) 区域都会导致IA病理和破裂风险.
科学领域:
- 生物医学工程 生物医学工程
- 流体动力学 流体动力学
- 心血管研究研究心血管研究
背景情况:
- 内动脉瘤 (IA) 是危及生命的血管疾病.
- 血液动力学显著影响IA稳定性和破裂风险.
- 了解IA壁的行为和斑块的形成对于风险评估至关重要.
研究的目的:
- 为了描述IA墙壁内的血液动力学条件.
- 为了研究血液动力学对IA的发展的影响.
- 为了将血动力学指标与特定的IA壁面特征相关联.
主要方法:
- 从359个IA和213个IA血栓中重建患者特有的血管模型.
- 用于解决血流分析不稳定的纳维埃-斯托克斯方程的有限元素方法.
- 动脉瘤壁子区域的细分和壁剪应力 (WSS) 和其他血液动力学指标的计算.
主要成果:
- 血液动力学指标在不同IA亚区的显著差异.
- 低WSS和高振荡剪切指数 (OSI) 区域与bleb形成相关.
- 高WSS地区 (部,入流/出流) 也表现出由于流量冲击而存在明显的气体发展风险.
结论:
- 低壁和高壁剪切应力环境都通过不同的机制促进IA病理.
- 血液动力学表征提供了关于IA稳定性和破裂风险的见解.
- 鲜明的血液动力学概况与特定的IA壁面特征和血栓发育有关.
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