基于B型大动脉剖析的支架血管血液的多相流体-固体相互作用分析
Shirun Zhong1, Yang Ouyang2, Geng'e Zhang3
1School of Mechanical Engineering, Guangxi University, Nanning, Guangxi, China.
概括
胸内血管大动脉修复 (TEVAR) 用于B型大动脉剖析 (TB-AD) 从先进的模拟中获益. 八峰支架移植在改善血管形态和血液流动方面显示出最佳的结果,减少了压力.
科学领域:
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
- 计算流体动力学的流体动力学.
背景情况:
- 胸内血管大动脉修复 (TEVAR) 是斯坦福B型大动脉剖析 (TB-AD) 的关键治疗方法.
- 现有的TB-AD有限元模拟通常使用简化的模型,忽视了复杂的支架-血管-血液相互作用.
- 精确的模拟对于优化TEVAR设备设计和治疗策略至关重要.
研究的目的:
- 开发和验证一种针对患者的计算模型,用于在TB-AD中模拟TEVAR.
- 在TB-AD治疗中评估不同支架移植设计 (5,6和8峰) 的生物力学性能.
- 确定最佳的支架移植配置,以改善血管功能和减少压力.
主要方法:
- 用CT图像和布尔操作创建了针对患者的TB-AD3D血管模型.
- 用有限元分析来模拟支架移植部署 (压缩和释放).
- 一个液体-固体相互作用模块被用于多相血流和血管壁模拟.
主要成果:
- 支架移植的部署使剖析血管的截面面积增加了60.0%-65.5%.
- 真光线中的血液流速下降,而血压在两个光线中都增加.
- 墙壁等效应力变得更加均,并显著减少,八峰接种器表现最好.
结论:
- 与5和6峰设计相比,八峰支架移植显示出优越的生物机械性能.
- 这种优化的支架移植设计提供了改善的血管形态,血液流动动力学,并减少了TB-AD治疗的压力.
- 针对患者的模拟对于推进TEVAR设备开发和临床应用至关重要.
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