Application and Numerical Analysis of a New Type of Internal Iliac Stent Graft in the Treatment of Arterial Diseases

Abstract

The internal iliac stent graft (SG) was inserted into the iliac artery by means of intervention, and the SG is compressed radially. Purpose of this paper: The effects of radial compression on the mechanical behavior of the new type of SG were studied. Method: Build a model of SG that based on the measured data. The mechanical behavior of the model was analyzed under the condition of 15% and 20% radial compression by finite element simulation. Finally, the worst case of the SG was found out, and then the fatigue test was conducted to determine the fatigue properties of the SG. Result: It was found that the maximum strain position of the new type of SG was the corner of the stent, and the most vulnerable position was the configuration of the proximal wave ring, but it still met the fatigue safety conditions. Conclusion: The results show that the finite element analysis can be used to simulate the fatigue properties of the SG effectively and provide theoretical guidance for its design and clinical application.