Optimized design of a non-isopeak-ring endovascular stent graft for thoracic aortic aneurysm.

IF 1.7 4区医学 Q2 SURGERY

Minimally Invasive Therapy & Allied Technologies Pub Date : 2025-06-24 DOI:10.1080/13645706.2025.2523253

Yu Zhou, Chengli Song, Ailing Zhang, Shiju Yan

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引用次数: 0

Abstract

Background: To optimize the design of the stent graft (SG) with a non-isopeak-ring, this study investigates the radial support and bending flexibility properties of SGs with different spacing, number of peaks, and peak heights.

Methods: Numerical simulation and physical experiments were used to compare the mechanical properties of isopeak-ring SGs and non-isopeak-ring SGs.

Results: Greater spacing of stent rings can provide greater bending flexibility; fewer peaks in the stent ring result in more radial support and less spring-back force. The SG design featuring a gradient of five wave peaks and a minimum stent ring spacing of 5 mm has the best flexibility. The relationship in terms of radial support force magnitude is as follows: isopeak-ring with heights of 13 mm > combination > gradient > isopeak-ring with heights of 16 mm. Additionally, the smaller the peak height, the greater its radial support.

Conclusions: It is found that the gradient SG with five peaks not only provides sufficient radial support but also demonstrates superior flexibility compared to other types of SGs.

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胸主动脉瘤非等开环血管内支架的优化设计。

背景：为了优化非等峰环支架的设计，本研究研究了不同间距、峰数和峰高的支架的径向支撑和弯曲柔韧性。方法：采用数值模拟和物理实验相结合的方法，比较等丁环和非等丁环的力学性能。结果：支架环间距越大，可提供更大的弯曲灵活性；支架环的峰值越少，径向支撑越大，回弹力越小。SG设计具有5个波峰梯度和最小支架环间距5mm的特点，具有最佳的灵活性。径向支撑力大小的关系为：等高13mm的等高环>组合>梯度>等高16mm的等高环。此外，峰高越小，其径向支撑越大。结论：五峰梯度SG与其他类型SG相比，不仅具有足够的径向支持，而且具有优越的柔韧性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Minimally Invasive Therapy & Allied Technologies 医学-外科

CiteScore

3.80

自引率

5.90%

发文量

审稿时长

6-12 weeks

期刊介绍： Minimally Invasive Therapy and Allied Technologies (MITAT) is an international forum for endoscopic surgeons, interventional radiologists and industrial instrument manufacturers. It is the official journal of the Society for Medical Innovation and Technology (SMIT) whose membership includes representatives from a broad spectrum of medical specialities, instrument manufacturing and research. The journal brings the latest developments and innovations in minimally invasive therapy to its readers. What makes Minimally Invasive Therapy and Allied Technologies unique is that we publish one or two special issues each year, which are devoted to a specific theme. Key topics covered by the journal include: interventional radiology, endoscopic surgery, imaging technology, manipulators and robotics for surgery and education and training for MIS.