不同的手术关节下血管再动脉化形态的血液动力学,用于胸内血管大动脉修复
Yining Zhang1, Zhongze Cao2, Xiran Cao1
1School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
Computer methods and programs in biomedicine
|February 6, 2025
概括
使用血液动力学模拟优化关节-关节下关节绕道 (CSB) 和关节-关节转移 (SCT) 配置,可以改善左关节下动脉 (LSA) 重血管化. 适度的直径,较短的长度和对齐的解增强了血液流动并降低了风险.
科学领域:
- 血管外科 血管外科
- 生物医学工程 生物医学工程
- 流体动力学 流体动力学
背景情况:
- 关节 - 关节旁路 (CSB) 和关节 - 关节转移 (SCT) 是用于左关节动脉 (LSA) 重血管化的标准外科治疗方法.
- 目前CSB和SCT的手术策略严重依赖于外科医生的经验,缺乏客观的,数据驱动的指导来选择最佳配置.
研究的目的:
- 调查CSB和SCT各种形态配置对血液动力学性能的影响.
- 提供客观的数据,以指导选择最佳的手术配置LSA重血管化.
主要方法:
- 为CSB和SCT构建了28个不同的几何配置,不同的参数如假肢导管长度,直径,角度和解剖方向.
- 采用数值模拟来评估血液动力学结果,包括压力下降,流速,能量损失和壁压力指标.
主要成果:
- 对于CSB,将假肢管径增加到9毫米提高了流量,但更大的直径增加了血栓形成的风险. 较长的导管 (>15毫米) 增加了电阻. 与左常 carotid 动脉 (LCCA) 的最佳导管角度最大限度地降低了能量损失,向下倾斜的导管显示出较高的缩流量,但减少了整体周期平均流量.
- 在LCCA和LSA之间的角度较小的SCT配置显示出卓越的血液动力性能,不同角度的流速变化高达30.34%.
结论:
- 最佳的CSB配置涉及中等尺寸的,较短的假体导管,并与LCCA血液流量保持一致.
- SCT配置受益于LCCA和LSA之间的较小角度,以提高血液动力效率.
- 这些发现提供了客观的标准,以优化CSB和SCT手术的外科规划,提高LSA重血管化结果.
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