新型可降解肠道吻合支架的建模仿真与实验研究
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国家自然科学基金项目(51735003,51901137)


Simulation and Experimental Study on a Novel Biodegradable Intestinal Anastomosis Stent
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    摘要:

    目的 设计一款新型可降解肠道吻合支架,探究肠道组织在加压吻合时施压距离与吻合口生物力学性能之间的关系,为肠道组织的加压吻合提供新思路与方法。方法 设计一款用于肠道组织的加压吻合支架,建立肠道组织加压吻合的有限元模型,并探究支架施压面距离(2、1.6、1.2、0.8 mm)与组织应力之间的关系;通过撕脱力与爆破压测试,分析肠道组织在不同施压距离下的吻合效果。结果 当施压距离为1.2 mm时,肠道吻合口的生物力学性能最佳,其最大抗拉强度达到0.77 MPa;组织的撕脱力和爆破压分别为(25.80±1.82) N和(12.30±0.26) kPa;当组织被压缩至原有厚度的60%时,肠道吻合效果最好。结论 本文设计的可降解肠道支架可成功实现对肠道组织的加压吻合,为新型可降解加压吻合器械的开发和应用提供理论参考。

    Abstract:

    Objective To design a novel biodegradable intestinal anastomosis stent and explore the relationship between pressure distance and biomechanical properties of the anastomosis, so as to provide new ideas and methods for compression anastomosis of intestinal tissues. Methods A compression anastomosis stent was designed for reconstruction of intestinal tissues, and the finite element model of compression anastomosis of intestinal tissues was established to investigate the relationship between pressurized distance (2, 1.6, 1.2, 0.8 mm) and tissue stress of the stent. The anastomosis effect of intestinal tissue under different pressurized distances was analyzed by the test of tear-off force and burst pressure. Results Biomechanical properties of the intestinal anastomosis were the best when the pressurized distance was 1.2 mm, and its maximum tensile strength reached 0.77 MPa. The tear-off force and burst pressure of tissues were (25.80±1.82) N and (12.30±0.26) kPa, respectively. The optimal intestinal anastomosis was achieved when tissues were compressed to 60% of the original thickness. Conclusions The biodegradable intestinal stent designed in this study can successfully achieve compression anastomosis of intestinal tissues, which provides theoretical references for the development and application of novel biodegradable compression anastomosis devices.

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张成,胡钟欣,李君一,周权,张文燕,宋成利,毛琳.新型可降解肠道吻合支架的建模仿真与实验研究[J].医用生物力学,2022,37(3):504-509

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  • 收稿日期:2021-07-09
  • 最后修改日期:2021-09-12
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  • 在线发布日期: 2022-06-24
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