自冷却射频电极仿真分析与验证

Simulation Analysis and Verification of Self-Cooling RF Electrode

摘要: 目的：设计一种自冷却射频肠吻合电极，并对其性能进行仿真分析与验证。方法：利用COMSOL Multiphysics软件，对所设计的自冷却射频肠吻合电极进行仿真分析，研究3种不同冷却介质流速对冷却效果的影响规律，并与非自冷却电极吻合过程中组织温度的变化进行对比，最后通过实验验证所设计电极的有效性。结果：有限元仿真结果表明，当冷却介质流速在0.1 m/s时，吻合口温度趋于平稳，最高温度为99.63℃，而利用非自冷却电极时吻合口的最高温度为161.91℃。实验结果表明，利用自冷却电极吻合后，吻合口的平均爆破压为43.29 mmHg。结论：与非自冷却电极相比，利用自冷却电极进行肠组织吻合时，吻合口的最高温度远低于非自冷却电极，且吻合口的平均爆破压也满足临床需要，表明本文所设计的自冷却射频肠吻合电极是有效的。

Abstract: Objective: To design a self-cooling radiofrequency enterostomy electrode and analyze and verify its performance by simulation. Methods: COMSOL Multiphysics software was used to simulate and analyze the designed self-cooling RF intestinal anastomosis electrode, to study the influence of three different cooling medium flow rates on the cooling effect, and to compare the change of tissue temperature with that of non self-cooling electrode during the anastomosis process. Finally, the effectiveness of the designed electrode was verified by experiments. Results: The finite element simulation results showed that when the cooling medium flow rate was 0.1 m/s, the anastomotic temperature tended to be stable, and the maximum temperature was 99.63˚C, when the non self-cooling electrode was used, the maximum temperature was 161.91˚C. The experimental results show that the average burst pressure of anastomotic stoma is 43.29 mmhg for using self- cooling electrode anastomosis. Conclusion: Compared with the non self-cooling electrode, the maximum temperature of the anastomotic stoma is much lower than that of non self-cooling electrode, and the average burst pressure of the anastomotic stoma also meets the clinical needs, which indicates that the self-cooling radiofrequency intestinal anastomosis electrode designed in this paper is effective.