材料参数可变性对预测的冠状动脉生物力学环境的影响,通过不确定性量化量化
Caleb C Berggren1, David Jiang1, Y F Jack Wang1
1Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
Biomechanics and modeling in mechanobiology
|February 16, 2024
概括
血管材料性质的不确定性显著影响预测的动脉应力. 这项研究开发了一个框架来量化这种不确定性,这对于可靠的患者特定生物力学建模至关重要.
科学领域:
- 生物医学工程 生物医学工程
- 计算力学 计算力学 计算力学
- 材料科学 材料科学 材料科学
背景情况:
- 心血管应用中的患者特定建模需要强大的模拟,考虑到输入不确定性.
- 不确定性量化对于建立对计算生物力学预测的信心至关重要.
研究的目的:
- 通过结合的不确定性量化-有限元 (FE) 框架,研究血管材料特性不确定性对预测应力的影响.
- 确定导致冠状动脉应力变化的关键物质参数.
主要方法:
- 在理想化的冠状动脉模型中应用了结合不确定性量化-FE框架.
- 使用层特定的机械测试数据来定义材料参数的概率分布.
- 在UncertainSCI软件中使用多项式混乱技术来计算统计数据和灵敏度.
主要成果:
- 材料性质的不确定性传播到整个容器壁的显著应力变化,特别是在冒险.
- 压力变化最容易受到异性菌株能量功能的不确定性影响.
- 与嵌入式纤维相关的类似应力参数的不确定性是应力变化的主要因素.
结论:
- 材料性质的变化对预测的动脉应力有很大影响,这凸显了生物力学模型中不确定性量化的必要性.
- 开发的框架为探索和描述计算生物力学前模型不确定性提供了一个管道.
- 这些发现与提高患者特异性心血管模拟的可靠性和安全性有关.
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