LDV measurements in lateral model aneurysms of various sizes
LDV measurements in lateral model aneurysms of various sizes
复制标题
不同大小的侧向模型动脉瘤的 LDV 测量
DOI：
10.1007/s003480050116
复制
发表时间：
1997
影响因子：
2.4
通讯作者：
Chin
中科院分区：
文献类型：
--
作者：
T. Liou;W. Chang;Chin
摘要采用激光多普勒测速仪（LDV）测量了载瘤血管呈90°角的动脉瘤模型的三维流场。 所考虑的血流是脉动的，动脉瘤壁是刚性的。基于母体血管的整体平均速度和直径的平均、峰值和最小雷诺数分别为550、790和375。比较目前的体外研究，以前的体外研究，计算机模拟和体内研究。结果发现，流入角到外侧动脉瘤，最大壁面剪应力作用在远端唇的外侧动脉瘤，和动脉瘤内的旋涡运动增加，随着动脉瘤的大小减小。这一事实与动脉瘤圆顶处流入的撞击分叉一起为小临界尺寸的外侧动脉瘤破裂提供了可能的血液动力学因素。
Abstract Laser Doppler velocimetry (LDV) measurements are presented of three-dimensional flow fields in lateral model aneurysms arising from a straight parent vessel at a 90° angle. The flow considered was pulsatile and the aneurysm wall was rigid. The mean, peak, and minimal Reynolds numbers based on the bulk average velocity and diameter of the parent vessel were 550, 790, and 375, respectively. Comparisons among present in vitro studies, previous in vitro studies, computational simulations, and in vivo studies were made. It was found that the inflow angle into the lateral aneurysm, the maximum wall shear stress acting on the distal lip of the lateral aneurysm, and the intra-aneurysmal vortical motion increased with decreasing aneurysm size. This fact together with the impingement bifurcation of the inflow at the aneurysm dome provide possible hemodynamic factors for the rupture of the lateral aneurysm at small critical size.
河野洋介：流动可视化 [IV]。
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--