单卵双胞胎内动脉瘤的病理生理学:从血液动力学的角度看,一个罕见的案例研究
Hang Yi1, Zifeng Yang1, Luke Bramlage2
1Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH, 45435, USA.
Computers in biology and medicine
|June 24, 2023
概括
在单胞胎双胞胎之间发现了脑内动脉瘤 (IA) 的血液动力学差异,这表明环境因素影响IA形成. 高壁剪压及其在前脑动脉分叉的梯度预测IA的生成和增长.
科学领域:
- 生物医学工程 生物医学工程
- 神经科学是一个神经科学.
- 医学物理 医学物理
背景情况:
- 内动脉瘤 (IA) 的形成和生长机制尚未完全理解,特别是在基因相同的个体中.
- 血液动力学因素与IA的发展有关,但单胞胎双胞胎的详细比较很少.
研究的目的:
- 为了研究和比较罕见的一对单胞胎双胞胎之间内动力学差异的脑内动脉瘤.
- 确定与前脑动脉IA形成和生长相关的关键血液动力学参数.
主要方法:
- 利用经过实验验证的数值模型来模拟单胞胎双胞胎的神经血管几何体内的血流.
- 分析了7个关键的血液动力学参数,包括瞬间壁剪应力 (IWSS) 和它的梯度 (IWSSG).
- 进行了涉及虚拟移除IA的废除研究,以评估其影响.
主要成果:
- 在单胞胎双胞胎之间观察到显著的血液动力学变异,尽管它们具有共同的遗传.
- 高IWSS和IWSSG被确定在前脑动脉分叉处,与IA生成站点相关.
- 一个双胞胎的特定解剖特征,如窗体复合体,与异常的IWSS,IWSSG和振荡剪切指数 (OSI) 相关,可能促进IA生长和破裂.
结论:
- 受非遗传因素影响的血液动力学变化在内动脉瘤发育中起着至关重要的作用.
- 特定的血液动力学特征,如高IWSS和OSI,表明在研究中的双胞胎中IA进展和破裂的风险不同.
- 内动脉瘤可以改变区域血流,影响下游组织输液.
关键词:
计算流体动力学 (CFD) 是一种计算流体动力学.窗动脉 (FA) 是一种动脉.血液动力学 血液动力学内动脉瘤 (IA) 病理生理学单胞胎双胞胎 (MT) 的情况非牛顿模型的建模.振荡式切割指数 (OSI) 是一个指标.时间平均压力 (TAP)墙壁剪切应力 (WSS) 是指墙壁剪切应力.墙面剪切应力梯度 (WSSG) 是指墙面剪切应力梯度.更多相关视频
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