大肠组织端端吻合的有限元建模与分析

发布时间：2018-03-22 05:17

本文选题：端端吻合　切入点：吻合器　出处：《医用生物力学》2017年04期 　论文类型：期刊论文

【摘要】：目的分析吻合钉成钉高度与组织损伤和吻合压力之间的关系,为医生选择合适的吻合钉钉匣及成钉高度提供理论依据和指导,提高手术的安全性。方法分析吻合钉与大肠组织交互作用,并建立大肠端端吻合的有限元模型,比较壁厚为1.0~1.5 mm的大肠组织在4种不同成钉高度时的应力分布以及径向平均应力变化。结果壁厚为1.2、1.3、1.4、1.5 mm的大肠组织,在对应成钉高度为1.0、1.1、1.2、1.5 mm时,吻合面径向平均应力分别为56.0、58.6、59.7、57.3 k Pa,与最佳吻合压力58.8 k Pa接近;最大应力出现在吻合钉与组织接触位置,其值分别为2 783、1 750、1 940、2 030 k Pa。结论吻合手术不能完全避免组织损伤,应力集中一般存在于组织与吻合钉接触的区域;将组织压缩50%~60%时成钉,吻合效果最优。
[Abstract]:Objective to analyze the relationship between nail height and tissue injury and anastomosis pressure, and to provide theoretical basis and guidance for doctors to select suitable anastomotic nail box and nail height. Methods the interaction between anastomosis nail and colorectal tissue was analyzed, and the finite element model of end-to-end anastomosis of large intestine was established. The stress distribution and radial mean stress changes of colorectal tissue with a wall thickness of 1.0 ~ 1.5 mm at four different nail forming heights were compared. Results when the wall thickness was 1.31.3 ~ 1.4mm, when the corresponding nail height was 1.0 ~ (-1) ~ (-1) ~ (1.2) ~ (1.5) mm, The radial mean stress of anastomotic plane was 56.0 / 58.6 / 59.77.3kPa, which was close to the optimum anastomosis pressure (58.8 KPA), and the maximum stress appeared in the contact position between anastomosis nail and tissue with the values of 2783 / 1 750 / 1 94040 / 2030kPa.Conclusion anastomotic surgery can not completely avoid tissue injury. The stress concentration usually exists in the area where the tissue is in contact with the anastomosis nail, and when the tissue is compressed from 50 to 60, the nail is formed and the anastomosis effect is the best.
【作者单位】：上海理工大学医疗器械与食品学院现代微创医疗器械及技术教育部工程研究中心;
【基金】：国家自然科学基金项目(81171484,51175345) 中国博士后科学基金(2016M590368)
【分类号】：R318.01;R608

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