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Title:: Computational mechanical analysis of novel honeycomb degradable airway stent

Author(s):: SUN Wenchao1; 2; CUI Biao1; ZHANG Zhiguo1; （1.College of Mechanical and Electronic Engineering, Hohai University, Changzhou 213002, China； 2.China Automotive Chuangzhi Technology Co., Ltd, Nanjing 211100, China）

Keywords:: Benign airway stenosis; Degradable airway stent; Honeycomb structure; Radial support force; Computational mechanical analysis

摘要:: 针对目前可降解气道支架径向支撑力不足的问题，本研究设计了一款具有蜂窝结构的可降解气道支架。首先，基于患者CT扫描数据重建下气道三维数值模型，测量狭窄段数据，并使用SolidWorks 2018对支架进行三维建模；然后，借助Geomagic Design X优化支架模型；最后，基于ABAQUS对其进行计算力学分析。结果表明，相比于类正弦结构与网状结构支架，蜂窝结构可降解气道支架的径向支撑力分别提高了19.28%和8.24%。本研究可为未来可降解气道支架的研发提供重要参考。

Abstract:: Aiming at the insufficient radial support of current degradable airway stents，we designed a degradable airway stent with honeycomb structure. Firstly, based on the CT scan data, a three-dimensional numerical model of the lower airway was reconstructed and the stenosis segment data was measured. Then SolidWorks 2018 was used to build 3D model of airway stent, and the stent model with Geomagic Design X was optimized. Finally,stent model was analyzed in computational mechanics based on ABAQUS. The results showed that compared with the sine-like and reticular structure stent, the radial support force of honeycomb degradable airway stent increased 19.28% and 8.24%, respectively. This study can provide important reference for the development of degradable airway stent in the future.