血栓的高弹性:弥合了显微和连续尺度之间的差距
Nicholas Filla1, Beikang Gu1, Jixin Hou1
1School of Environmental, Civil, Agricultural and Mechanical Engineering, College of Engineering, University of Georgia, Athens, GA, 30602, USA.
概括
这项研究引入了血液凝块的新型超弹性模型,将微观结构与机械行为联系起来. 该模型准确预测血栓反应,有助于理解血栓栓塞并设计血栓切除术等医疗干预措施.
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
- 血液学 血液学 血液学
背景情况:
- 血液凝块的生物力学对循环系统的功能至关重要,如闭塞和栓塞.
- 现有的模型往往忽略了纤维素纤维,纤维素网络和红细胞的微结构贡献.
- 在了解微观结构变化如何影响血块机械反应方面存在差距.
研究的目的:
- 开发和验证血栓的超弹性潜能模型,该模型包含微观结构组件.
- 量化微观结构变异对在外部应力下凝块机械行为的影响.
- 提供有关血栓栓塞机制的见解,并协助设计外科手术.
主要方法:
- 开发了一个超弹性潜力模型,其中有六个不同的应变能量组件,代表纤维对齐,拉伸,曲,密集和堵塞.
- 利用简单的波器,单面波潜力和高斯潜力来定义应变能量组件.
- 在张力中验证了纤维素凝块和压缩和剪切中的血块实验数据的模型.
主要成果:
- 提出的超弹性模型,有13个参数,在张力,压缩和剪切验证数据集中展示了强度.
- 模拟显示了大多数应变参数的机械相关性,纤维曲需要稍微改进.
- 六个拉伸能量项中的五个准确地代表了它们预期的微观结构贡献.
结论:
- 开发的模型有效地将血块微观结构与宏观机械反应联系起来.
- 这种模型为血栓栓塞的行为提供了有价值的见解.
- 这些发现可以帮助计算机辅助设计手术工具和干预措施,如血栓切除术.
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