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A novel wavy non-uniform ligament chiral stent with J-shaped stress-strain behavior to mimic the native trachea

Bio-Design and Manufacturing 2021年第4期4卷 851-866页

作者： Jiapeng Liu Xinhua Yao Zhenwei Wang Jian Ye Congcong Luan Jianzhong Fu Yong He State Key Laboratory of Fluid Power and Mechatronic Systems College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Department of Pneumology Affiliated Hangzhou First People’s HospitalZhejiang University School of MedicineHangzhou 310006China

Tracheal stents are an important form of treatment for benign or malignant central airway ***,the mechanical behavior of current tracheal stents is significantly different from that of the native trachea,which leads to a variety of serious *** this study,inspired by the structure of the native trachea,a wavy non-uniform ligament chiral tracheal stent is proposed,in which J-shaped stress-strain behavior and negative Poisson's ratio response are achieved by replacing the tangential ligament of tetrachiral and anti-tetrachiral hybrid structure with a wavy non-uniform *** the combination of theoretical analysis,finite element analysis and experimental tests,a wide range of desired J-shaped stress-strain curves are explored to mimic the native porcine trachea by tailoring the stent ***,the negative Poisson’s ratio and auxetic diameter curves versus axial strain of the stent are also studied in detail,thus contributing to the enhancement of cross-section ventilation and reducing the migration of the *** novel tracheal stent with a unique microstructure shows a potential to perfectly match the physiological activities of the native trachea and thereby reduce potential complications.

关键词： tracheobronchial stenosis Tracheal stent Chiral auxetic structure Wavy non-uniform ligament J-shaped stress-strain behavior Negative Poisson’s ratio

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Multi-detector computed tomography evaluation of tracheobronchial anomaly in pediatric patients with left pulmonary artery sling

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Chinese Medical Journal 2013年第14期126卷 2790-2792页

作者： HU Xi-hong PA Mi-er SHEN Quan-li HUANG Guo-ying Department of Radiology Children's Hospital of Fudan University Shanghai 201102 China Heart Centre Children's Hospital of Fudan University Shanghai 201102 China

The left pulmonary artery sling （LPAS） is a rare vascular anomaly causing respiratory distress in which theleft pulmonary artery arises from the posterior aspect of the right pulmonary artery, courses posteriorly to the right of the bronchus and passes between the trachea and oesophagus to reach the hilum of the left lung. The LPAS is frequently associated with tracheobronchial tree anomalies and congenital cardiac defects. Proper assessment of the tracheobronchial and cardiovascular anomaly is essential in LPAS for planning management of the patient. Currently,

关键词： left pulmonary artery sling tracheobronchial stenosis multi-detector, computed tomography

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