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半桥支架治疗主动脉弓动脉瘤的仿真

Keywords: 介入治疗,血流动力学,心血管手术,生物力学

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Abstract:

针对顶部附带局部突起的主动脉弓动脉瘤,提出了一种半桥支架治疗方法.为展示动脉瘤附近的详细流动情形和压力、壁面切应力分布,检验半桥支架是否具有可以促进瘤腔内血栓、闭锁形成的血流动力学特征,构建了无支架和半桥支架治疗带局部突起的主动脉弓动脉瘤模型.利用计算流体力学的方法对2个模型中的生理性血液流动进行了仿真,并对血流动力学进行了比较和分析.仿真结果表明:半桥支架模型瘤腔内的流动受到明显抑制,特别是局部突起处的压力和壁面切应力大大地减小了,因此,半桥支架可以促进瘤腔内血栓的形成,并能减小动脉瘤破裂的危险,是一种可行的支架治疗动脉瘤的方法.

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