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为了计算动脉粥样硬化和局部斑块形成的堵塞对血管壁工作状态的影响,论文根据血液流动的连续性方程、运动方程,管壁的运动方程,在给定了血压波形函数的基础上,求得了狭窄血管管壁的径向位移及环向应力.分析了不同狭窄程度对血管壁变形及应力的影响;给出了不同狭窄情况下和局部斑块硬化程度不同时,血管植入支架所需的作用力;计算出植入支架后血管壁的径向位移及应力状态.论文的研究结果可供临床上对狭窄血管植入支架后的变形与受力分析及支架的正确安放参考;可避免发生堵塞严重或血管钙化时,由于安放支架不当而发生血管破裂的医疗事故.
In order to calculate the effect of blockage of atherosclerosis and local plaque on the working condition of blood vessel wall, according to the continuity equation of blood flow, the equation of motion and the equation of motion of blood vessel wall, on the basis of the blood pressure waveform function, The radial displacement and circumferential stress of the narrow vascular wall were obtained.The influence of different degree of stenosis on the deformation and stress of the vascular wall was analyzed.And under different stenosis and local plaque hardening degree, The force needed to calculate the radial displacement and stress state of the vessel wall after stent implantation.The results of the study can be used for clinical analysis of the deformation and force analysis of the stented vessel after stent implantation and the proper placement of the stent To avoid the occurrence of serious blockage or vascular calcification, due to inadequate stent placement and vascular rupture of the medical accident occurred.