模拟连续狭窄和冠状动脉旁路的冠状动脉血流。
Simulation of blood flow coronary artery with consecutive stenosis and coronary-coronary bypass.
机构信息
School of Mechanical Engineering, University of Tabriz, Tabriz, Iran.
出版信息
Bioimpacts. 2011;1(2):99-104. doi: 10.5681/bi.2011.013. Epub 2011 Aug 5.
INTRODUCTION
In this research the behavior of coronary arteries has been studied with symmetric and asymmetric consecutive stenosis, and grafted vessels.
METHODS
The incompressible Navier-Stokes and energy equations were discretized with second-order upwind method. Assumptions such as Newtonian fluid, wall rigidity and steady-flow were used.
RESULTS
All the calculations showed the same results with Newtonians and non- Newtonian fluids. It was found that the possibility of stenosis be reduced by increasing the graft angle. However, there exists further stenosis possibility. Among the three graft angles 20, 30 ˚ and 40, the 30 ˚ was found to be the reliable ones.
CONCLUSION
Based on these findings, it can be deduced that there would be a high risk of further atherosclerosis when the first stenose has the maximum percentage.
简介
本研究通过对称和非对称连续狭窄以及移植血管研究了冠状动脉的行为。
方法
不可压缩的纳维-斯托克斯方程和能量方程采用二阶迎风格式离散化。采用牛顿流体、壁面刚性和稳态流等假设。
结果
所有计算结果均表明牛顿流体和非牛顿流体具有相同的结果。研究发现，通过增加移植物角度可以降低狭窄的可能性。然而，仍然存在进一步狭窄的可能性。在 20°、30°和 40°三个移植物角度中，发现 30°是可靠的。
结论
基于这些发现，可以推断出当第一次狭窄具有最大百分比时，进一步发生动脉粥样硬化的风险会很高。
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