Numerical Simulation of Hemodynamics in Three Kinds of Convertible Vena Cava Filters
10.16156/j.1004-7220.2018.06.04
- VernacularTitle:3种可转换型腔静脉滤器血流动力学 数值模拟
- Author:
Haiquan FENG
1
;
Yun LI
1
;
Fang GUO
1
;
Kun WANG
1
Author Information
1. College of Mechanical Engineering, Inner Mongolia University of Technology
- Publication Type:Journal Article
- Keywords:
convertible vana cana filters;
hemodynamics;
blood flow velocity;
differential pressure;
wall shear stress
- From:
Journal of Medical Biomechanics
2018;33(6):E496-E500
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the hemodynamic effect of the convertible vena cava filters on treating pulmonary embolism with different thrombus diameters and contents. Methods Three kinds of simulated filter models with the same diameter but different filtering structures (L-style, S-style and W-style) were built and then the hemodynamics of the filter after its implantation into the vessels was analyzed by using computational fluid dynamic (CFD) method. Results Without thrombus in the vessels, three kinds of filters in blood had some obstructive effects and increased the average outlet velocity. While the L-style filter caused the maximum average outlet velocity, the S-style filter was in the middle, and the W-style filter was the lowest. Under the condition of thrombus, the structures of the filter rods had no obvious effect on the average outlet velocity of blood flow and thrombus, and differential pressure of blood flow and thrombus between inlet and outlet. With the increase of thrombus’s diameter and content, the hemodynamic factors showed varying degrees of decreasing tendency. The wall shear stresses (WSS) on three kinds of filter rods caused by blood flow were in normal ranges, and WSS on the lower end of filter supports, the joints of supports and filter rods were below the minimum value, where thrombosis was easy to occur. Conclusions The hemodynamic effect of three kinds of convertible vena cava filters with different filtering structures, different thrombus diameters and contents in vessels were analyzed by using CFD method, which would provide theoretical references for the design and development of novel filters.
