Abstract The purpose of this study was to compare side-to-side and functional end-to-end anastomosis techniques that are commonly used in bowel surgery. Considering the dimensions of these two different anastomosis models, SolidWorks program was used for 3 D studies. Intra-intestinal flow analyzes were performed based on the finite volume method using Ansys Fluent, a computational fluid Dynamics (CFD) program. The flow velocity, pressure, turbulent knetic energy, turbulence vortex distribution, vortex viscosity and wall shear stresses for each model were calculated in results of the analysis for the side-to-side and functional end-to-end anastomosis technique. Due to the geometrical structure of the functional end - to - end anastomosis model, turbulence and hence the vortex formation is less than the side - to - side anastomosis technique. Because intersect area of bowels has wider in functional end - to - end anastomosis model, flow become easier than other. In surgical practice, functional end-to-end anastomosis is preferred over side-to-side anastomosis because of the low probability of leakage. It can be noted that the functional end - to - end anastomosis technique will be safer because of less turbulence, based on the data of fluid flow velocities, pressure, turbulent knetic energy, turbulence vortex distribution, vortex viscosity and wall shear stresses in the anastomosis.

中文翻译：

---

两种不同肠吻合方式的有限容积法比较

摘要 本研究的目的是比较肠道手术中常用的侧对侧和功能性端到端吻合技术。考虑到这两种不同吻合模型的尺寸，SolidWorks 程序用于 3D 研究。基于有限体积法使用计算流体动力学 (CFD) 程序 Ansys Fluent 进行肠内流动分析。在侧对侧和功能性端到端吻合技术的分析结果中计算了每个模型的流速、压力、湍流动能、湍流涡分布、涡粘性和壁剪切应力。由于功能性端对端吻合模型的几何结构，湍流和涡流形成小于侧对侧吻合技术。因为在功能性端对端吻合模型中肠的交叉区域更宽，所以流动变得比其他模型更容易。在外科实践中，功能性端对端吻合优于侧向吻合，因为其泄漏概率较低。可以注意到，根据吻合中的流体流速、压力、湍流动能、湍流涡分布、涡粘性和壁面剪切应力的数据，功能性端到端吻合技术将更安全，因为湍流更少.