Qiu Yue, Yuan Ding, Wang Ye, Wen Jun, Zheng Tinghui
a Department of Applied Mechanics , Sichuan University , Chengdu , China.
b Department of Vascular Surgery, West China Hospital , Sichuan University , Chengdu , China.
Comput Methods Biomech Biomed Engin. 2018 Dec;21(16):824-833. doi: 10.1080/10255842.2018.1522531. Epub 2018 Nov 6.
This paper describes a systematic investigation on the hemodynamic environment in a patient-specific AAA with tortuous common iliac artery(CIA) and external iliac artery (EIA). 3D reconstructions from CT scans and subsequent computational simulation are carried out. It is found out that the Newtonian and non-Newtonian models have very similar flow field and WSS distribution. More importantly, it is revealed that the torturous CIA maintained its helical flow. It is concluded that the assumption of Newtonian blood is adequate in capturing the intra-aneurysmal hemodynamics. Moreover, it is speculated that the physiological spiral flow protects the twisted CIA from the thrombosis formation.
本文描述了对一名患有髂总动脉（CIA）和髂外动脉（EIA）迂曲的特定患者腹主动脉瘤（AAA）血流动力学环境的系统研究。通过CT扫描进行三维重建并随后进行计算模拟。结果发现，牛顿模型和非牛顿模型具有非常相似的流场和壁面切应力（WSS）分布。更重要的是，研究表明迂曲的髂总动脉保持其螺旋血流。得出的结论是，牛顿血液假设足以捕捉动脉瘤内的血流动力学。此外，据推测，生理性螺旋血流可保护迂曲的髂总动脉不形成血栓。
