Structural design of "fitness" and "feasibility" of body-fitted stent and its mechanical analysis

• Published in: Sheng wu yi xue gong cheng xue za zhi Vol. 41; no. 4; p. 790
• Main Authors: Sun, Hao, Tao, Keyi, Liu, Zhao, Du, Tianming, Zhang, Yanping, Liu, Shengwen, Feng, Jiling, Qiao, Aike
• Format: Journal Article
• Language: Chinese
• Published: China 25.08.2024
• Subjects: Computer Simulation; Humans; Plaque, Atherosclerotic; Prosthesis Design; Stents; Biomechanics; Endovascular stent; Stent malapposition; Numerical simulation; Structure design
• ISSN: 1001-5515
• DOI: 10.7507/1001-5515.202403005

To address the conflict between the "fitness" and "feasibility" of body-fitted stents, this paper investigates the impact of various smoothing design strategies on the mechanical behaviour and apposition performance of stent. Based on the three-dimensional projection method, the projection region was fitted with the least squares method (fitting orders 1-6 corresponded to models 1-6, respectively) to achieve the effect of smoothing the body-fitted stent. The simulation included the crimping and expansion process of six groups of stents in stenotic vessels with different degrees of plaque calcification. Various metrics were analyzed, including bending stiffness, stent ruggedness, area residual stenosis rate, contact area fraction, and contact volume fraction. The study findings showed that the bending stiffness, stent ruggedness, area residual stenosis rate, contact area fraction and contact volume fraction increased with the fitting order's increase. Model 1 had the smallest contact area fraction and contact