| 乔爱科,刘有军,曾衍钧.冠状动脉对称双路移植管中脉动血流的数值模拟[J].计算力学学报,2004,21(6):722~727 |
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| 冠状动脉对称双路移植管中脉动血流的数值模拟 |
| Numerical simulation of pulsatile blood flow in coronary artery with symmetric 2-way bypass graft |
| 修订日期：2003-02-21 |
| DOI：10.7511/jslx20046130 |
| 中文关键词: 再狭窄 血流动力学 冠状动脉移植管搭桥术 仿真 |
| 英文关键词:restenosis,hemodynamics,coronary artery bypass graft,simulation |
| 基金项目:教育部高等学校骨干教师资助计划，北京市优秀人才培养资助项目. |
| 乔爱科 刘有军 曾衍钧 |
| 北京工业大学机电学院,北京100022 |
| 摘要点击次数: 1385 |
| 全文下载次数: 9 |
| 中文摘要: |
| 冠状动脉旁路移植管搭桥术后，常会产生血管再狭窄，导致手术失败，。这与移植管的几何结构及血流动力学是密切相关的。作为改进措施，作者提出了采用对称双路搭桥的设想。本文利用有限元分析方法，对冠状动脉搭桥术中对称双路移植管内的生理流动进行了数值仿真。计算了缝合区附近的流场、壁面切应力、压力等血流动力学因素在心动周期内的时空分布情况。计算结果表明，对称双路搭桥具有较好的血流动力学，可以改善血管流场状况和减轻再狭窄发生。这对临床手术计划是很有帮助和指导意义的。 |
| 英文摘要: |
| Restenosis always occurs in coronary artery bypass graft and results in the surgery failure. This is close related to the geometry configuration and hemodynamics of the bypass graft. As an improvement, the authors presented a new model using symmetric 2-way bypass graft. The physiological blood flow in the new model is simulated with finite element method. The temporal-spatial distributions of hemodynamics such as flow patterns, wall shear stress and pressure etc in the vicinity of anastomosis were analyzed. It was shown that the symmetric 2-way bypass graft was featured with high blood flow velocity in the distal junction, little reversed flow, low pressure near the wall and small wall shear stress gradient etc., and was of favorable hemodynamics than the traditional 1-way bypass graft. The geometry configuration with symmetric 2-way bypass graft could improve the flow conditions and decrease the probability of restenosis. This study is of great help and guide meaning for the clinical surgery plan. |
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