根据大小,有两种可能的血液动力学机制导致脑动脉瘤的生长:NHO CFD ABO研究
Shunichi Fukuda1, Yuji Shimogonya2, Aoi Watanabe1
1Department of Neurosurgery, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
概括
大脑动脉瘤的生长机制因大小而异. 较小的动脉瘤 (<4毫米) 在部附近的高壁切削应力 (WSS) 下生长,而较大的动脉瘤 (≥4毫米) 在顶上生长,由于改变了WSS.
科学领域:
- 神经外科 神经外科
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
背景情况:
- 脑动脉瘤破裂带有很高的死亡率.
- 增长的脑动脉瘤有破裂的风险增加.
- 驱动动动脉瘤生长的血液动力学仍然不完全理解.
研究的目的:
- 为了研究与脑动脉瘤生长相关的血液动力学因素.
- 根据动脉瘤大小来区分生长的血液动力学机制.
- 为了告知外科治疗决策,并了解破裂理论.
主要方法:
- 一项针对481名患者的前性观察性研究.
- 使用动脉几何学和流量数据进行患者特定的计算流体动力学 (CFD) 分析.
- 多变量分析比较生长 (≥1mm增长) 和稳定动脉瘤之间的血液动力学指标.
主要成果:
- 对于动脉瘤<4mm,在不断增长的动脉瘤中观察到更高的时间平均壁剪应力 (WSS) 和横向WSS,特别是在部和母动脉.
- 对于动脉瘤≥4mm,在不断生长的动脉瘤中发现了更高的正常化横向WSS,特别是在圆顶上.
- 动脉瘤<4mm显示全动脉瘤生长,而较大的动脉瘤主要在圆顶生长.
结论:
- 脑动脉瘤生长可能存在两个不同的血液动力学机制,取决于大小.
- 较小的动脉瘤 (<4毫米) 可能会由于部附近的高幅度和多方向WSS干扰而生长.
- 更大的动脉瘤 (≥4mm) 可能在圆顶上生长,由增强的多方向WSS干扰驱动.
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