Experimental evaluation of self-expandable metallic tracheobronchial stents

Nanotechnology Reviews

article

Yanli Wang¹  Pengfei Dong²  Jingyao Ke²  Xiang Shen³  Zongming Li¹  Kewei Ren¹  Xinwei Han¹  Linxia Gu² 

[1] Department of Interventional Radiology, The First Affiliated Hospital, Zhengzhou University;Mechanical and Materials Engineering, College of Engineering, University of Nebraska-Lincoln, United States of America;School of Mechanical Engineering, Jiangsu University;Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, United States of America

关键词: self-expandable metallic tracheobronchial stent;    Y-shaped;    J-shaped;    covered stent;    bending resistance;   

DOI  :  10.1515/ntrev-2019-0013

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The self-expandable metallic stents have been widely used in tracheobronchial obstruction or fistulation, including the J-shaped and Y-shaped stents, named after the shape of the branch-stem junction of the stent. However, there is scarce data on the mechanical performance of these tracheobronchial stents, which is essential for optimal stent implantation. In this work, eight self-expandable metallic tracheobronchial stents in three types ( i.e ., straight, J-shaped, and Y-shaped), with or without cover, were characterized. The compression resistance of the stems was investigated through both compression and indentation tests. The bending resistance of the branches in the J-shaped and Y-shaped stents was assessed through the bending test. Our results demonstrated that the covered stents exhibited a significantly higher compression resistance and bending resistance than the uncovered ones. The branches had a minimal impact on the compression resistance of the stem. The branch of the J-shaped stent showed a significantly lower bending resistance than the Y shaped one. This work provides a testing framework for the J-shaped and Y-shaped stents,which could shed some light on the optimal design of stent with branches.

【 授权许可】

CC BY