内和外剖析动脉瘤之间的血液动力学差异:剪切力及其临床影响的分析
Felipe Ramirez-Velandia1, Vincenzo T R Loly2, Emmanuel O Mensah1
1Neurosurgical Service, Harvard Medical School, Beth Israel Deaconess Medical Center, 110 Francis Street, Boston, MA, 02215, USA.
Neurosurgical review
|November 15, 2025
概括
内剖析动脉瘤 (DA) 显示出血液动力学趋势,如较高的低剪切区域,这表明与外DA相比,破裂风险更高. 为了更好的管理策略,需要对这些差异进行进一步的研究.
科学领域:
- 血管外科 血管外科
- 生物医学工程 生物医学工程
- 医疗成像医学成像
背景情况:
- 内剖析动脉瘤 (DA) 由于破裂风险很高,往往需要紧急治疗.
- 额外骨DA通常被保守地管理,假定破裂率较低.
- 可能解释这些临床差异的血液动力学因素仍未得到充分研究.
研究的目的:
- 为了比较内和外DA之间的血液动力学参数.
- 为了确定潜在的血液动力学驱动器,对内 DA 和外 DA 的不同临床行为.
主要方法:
- 在2011年至2023年期间治疗的19个DA (10个外,9个内) 的回顾性分析.
- 使用3D切片器从血管图像中对DA的3D重建.
- 使用ANSYS Fluent进行计算流体动力学 (CFD) 模拟,以计算血液动力学参数 (TAWSS,HSA,LSA,TAWSR,OSI,RT).
主要成果:
- 外的DA在体积和面积上明显大于内DA.
- 内DA显示向较低的时间平均壁切削应力 (TAWSS) 和较高的低切削区域 (LSA) 的趋势.
- 非显著的趋势表明,在内DA中,TAWSR较低,相对停留时间 (RRT) 更长.
结论:
- 内DA表现出明显的血液动力学形状,包括较高的低剪切区域和与动脉瘤相对的血管壁剪切应力.
- 这些血液动力学趋势可能有助于在内DA中观察到的破裂风险增加.
- 对这些血液动力学差异的进一步调查对于完善DA的治疗策略至关重要.
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