Abstract

Info

Title:: Mechanical properties during periodical variation of prosthetic venous valve

Author(s):: YUAN Yuhan1; GU Xuelian2; CUI Jiankun1; TAO Yurong2; YUAN Zhenyu3; 1. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 2. School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 3. Shanghai Bluevastec Medical Technology Co., Ltd, Shanghai 201318, China

Keywords:: Keywords: prosthetic venous valve mechanical property chronic venous insufficiency finite element analysis

Abstract:: Objective To investigate the effects of various parameters of prosthetic venous valve on its mechanical properties for providing reference for the design and optimization of prosthetic venous valve. Methods Smooth particle hydrodynamics method was used to evaluate the fluid-structure interaction between valve and blood. There were 18 groups of parameters, including 2 valve materials (ePTFE and porcine pericardium), 3 valve lengths (5.0, 7.5, 10.0 mm) and 3 valve thicknesses (0.050, 0.075, 0.100 mm). The opening aperture, maximum equivalent stress and anti-reflux function were analyzed for determining the effects of the 3 factors on the valve. Results The valve made of porcine pericardium had a larger opening aperture, with a maximum of 5.90 mm, and the maximum equivalent stress on the valve was more stable. When the valve was opening, the maximum equivalent stress value on the valve with a length of 7.5 mm and a thickness of 0.100 mm was the lowest. When the valve was closing, the maximum equivalent stress on the valve with a length of 10.0 mm and a thickness of 0.100 mm was the lowest. A valve thickness of 0.075 mm was best for anti-reflux function. Conclusion Reducing the length and thickness of the valve within a certain range and increasing the elastic modulus of the valve material can increase the stability of prosthetic venous valve.