一个可变的横截面微流体通道,用于同时复制低振荡和脉冲性壁切削应力在 Carotid 分叉:一个基于计算流体动力学的计算流体动力学研究
Yong-Jiang Li1,2, Hui-Min Hou3, Qi-Fei Hu1,2
1Institute of Cardio-Cerebrovascular Medicine, Central Hospital of Dalian University of Technology, Dalian 116033, China.
Biosensors
|October 28, 2025
概括
研究人员开发了一种新型的微流体通道,可以复制复杂的血液流动模式,包括脉动和振荡壁剪压 (WSS),对于研究血管健康和动脉样硬化至关重要.
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:
- 脉动性血流在动脉分叉处产生复杂的壁切应力 (WSS) 模式,影响内皮功能.
- 低振荡性WSS (OWSS) 与内皮功能障碍和动脉样硬化有关,需要体外模型.
- 现有的微流体系统难以同时复制脉冲式WSS (PWSS) 和OWSS.
研究的目的:
- 设计和验证一个能够同时模拟生理脉冲性WSS和低振荡性WSS的微流体通道.
- 调查负责在微流体装置内产生明显的WSS模式的血液动力学机制.
- 为研究内皮细胞机械生物学和动脉样硬化病原体提供一个工具.
主要方法:
- 利用计算流体动力学 (CFD) 模拟来设计一个可变的横截面微流体通道.
- 优化通道几何参数 (步骤高度,宽度比,流量) 以实现所需的WSS配置文件.
- 分析了阶段段部分的 vortex 形成,作为产生 OWSS 的机制.
主要成果:
- 优化的微流体通道成功地重现了步骤部分的低OWSS (状鼻模拟) 和均部分的高PWSS.
- 根据CFD模拟,形形成对于产生OWSS至关重要,这取决于几何和流量参数.
- 该设计提供了一种强大的方法来模拟复杂的体内血液动力学环境.
结论:
- 开发了一种新型的微流体系统,以复制在动脉分叉处发现的独特的体内WSS模式.
- 这项技术可方便体外研究内皮质对各种血液动力学条件的反应.
- 这些发现支持未来研究WSS在内皮功能障碍和动脉样硬化中的作用.
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