Numerical Simulation on the Implantation of Nitinol Alloy Airway Stent
SUN Yimin
ZHU Ming
JIANG Chen
LI Zhenxiao
DENG Linhong
ZHANG Zhiguo
Abstract：Airway stenosis caused by various reasons has become a very common respiratory disease.The most effective treatment for it is nitinol alloy airway stent implantation, which can quickly dilate the airway stenosis and relieve the patient''s dyspnea.However, the implantation of airway stent usually causes the overgrowth of airway granulation tissue and even results in the airway restenosis.Based on the theory of "stress-growth",it is speculated that the overgrowth of airway granulation tissue may be associated with the changes of local mechanical environments, especially the mechanical stress between stent and airway wall.Therefore, the numerical simulation on the implantation of nitinol alloy airway stent was researched and the changes of local mechanical environments was analyzed.Results showed that the stress of airway wall enhanced significantly and the phenomenon of stress concentration was more serious after stenting.It is believed that the significant change of the local mechanical environmentsmay is one of the reasons that caused the overgrowth of airway granulation tissue.
Keywords：Nitinol alloy airway stentHyperplasia of granulation tissue3D numerical model reconstructionFluid-structure interaction analysisContact stress analysis
Publication Date：2017-01-01
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：5( 101-105 )