The Mechanical Behavior of Flexible Stents with Multiple Structures in Complex Peripheral Blood Vessels
Self-expandable NiTi alloy stents are gradually widely used to treat peripheral artery stenosis in humans, but due to the complex physiological environment of peripheral arteries and high-frequency bending deformation, the therapeutic effect of traditional structure stents after implantation is s...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2024-04-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=2312 |
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| Summary: | Self-expandable NiTi alloy stents are gradually widely used to treat peripheral artery stenosis in humans, but due to the complex physiological environment of peripheral arteries and high-frequency bending deformation, the therapeutic effect of traditional structure stents after implantation is still unsatisfactory, accompanied by a high risk of fatigue fracture. Therefore, a new type of flexible stent with multi-element structure is designed in this paper. Based on finite element calculation, the effects of plaque eccentricity on stent flexibility, expansion uniformity, peripheral vascular lumen patency rate and vascular and plaque stresses in the multi-stenosis peripheral vascular environment are analyzed. The results showed that the flexibility, expansion uniformity and lumen patency rate of the new flexible stent were superior to those of the conventional stent in the same peripheral vascular model; in the multiple stenotic vessels, the greater the eccentricity of the plaque, the better the flexibility of the new stent, and in the plaque model with an eccentricity of 25% , the stent expansion uniformity was the worst, the lumen patency rate was the largest, and the peak stress on the plaque was the smallest. The results of this study can provide a theoretical basis and scientific basis for the optimal design of peripheral stents oriented to multiple stenoses and the selection of stents in clinical practice. |
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| ISSN: | 1007-2683 |