对于患有HeartMate2和HeartMate3心室辅助器件的患者,左心室的统计形状建模
Marjan Azimi1, Diogo Ferreira de Almeida2, Mehrdad Khamooshi3
1Cardio-Respiratory Engineering and Technology Laboratory (CREATElab), Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, Victoria, Australia.
Computers in biology and medicine
|March 3, 2025
概括
左心室辅助器件 (LVADs) 可以增加血栓形成的风险,由于改变了血液流动. 左心室 (LV) 的解剖学变化显著影响这种风险,更大的LV体积和减少球状性是关键因素.
科学领域:
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
- 医学成像分析 医学成像分析
背景情况:
- 左心室辅助器件 (LVAD) 对末期心力衰竭至关重要,但会带来血栓形成的风险.
- 在LVAD植入后,心室内流动动力学的改变会导致非生理性剪切率和停滞区,增加血栓形成的风险.
- 关于输入管设计和血栓形成风险的相互矛盾建议可能源于患者特定的解剖学变异.
研究的目的:
- 研究左心室 (LV) 解剖学变异对LVAD患者血栓形成风险的影响.
- 为了探索报告的血栓形成风险的差异,可能是由于不同的LV解剖学.
- 以数值评估LV的统计形状模型 (SSM) 如何预测血栓形成风险.
主要方法:
- 使用的统计形状模型 (SSM) 来自19个LVAD患者CT扫描 (5HeartMate2,14HeartMate3).
- 采用连贯点漂移 (CPD) 用于LV注册和主要组件分析 (PCA) 用于SSM开发.
- 进行了计算流体动力学 (CFD) 分析,评估了壁切应力 (WSS),静止体积,动动能 (TKE) 和冲洗.
主要成果:
- 在HeartMate2和HeartMate3群体之间确定了不同的LV形状,包括球形,顶端圆形和形的差异.
- 较大的LV体积与静止体积增加和血液清理速度减慢相关,从而增加了血栓形成的风险.
- 减少 LV 球状性 (HM2) 和顶点凸起形成 (HM3) 与较高的血栓形成风险有关.
结论:
- 在HeartMate2和HeartMate3患者之间存在LV几何学的统计差异,受设备和植入技术的影响.
- 特定的LV解剖特征,特别是LV体积和形状,显著地使患者在LVAD植入后易患血栓形成.
- SSM为数值评估对LVAD相关血栓形成风险的解剖学影响提供了有价值的工具.
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