微创电动吻合器的优化设计、功能分析与离体实验
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上海理工大学医疗器械与食品学院

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国家自然科学基金重点项目(51735003),上海市科委项目(18441900200)


Design optimization, function analysis and in vitro experiments of an electric stapler for minimally invasive surgery
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School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology

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    摘要:

    目的:开发一款新型电动吻合器,以解决现有产品转角不足、操作不便、难以掌握压榨强度等问题。方法:设计一款电动吻合器并加工出样机,利用三坐标影像仪搭建样机功能测试平台测量出样机的运动轨迹曲线,用拟合优度检验来评估理论曲线与测量曲线的一致程度;在前端不同弯曲角度下,吻合新鲜离体猪小肠组织,测试吻合口的吻钉成型率。结果:转弯运动与击发运动的测试曲线与理论曲线拟合优度检验理想,而压榨运动的测试曲线与理论曲线的拟合优度在转弯关节弯曲0°~30°时不理想,45°~60°时理想。性能实验中吻钉畸形率低于1.14%,表明弯曲角度对吻合效果无显著影响。结论:击发运动和转弯运动的运动学测量曲线与理论曲线一致,压榨运动曲线在不同弯曲角度时存在波动,但不影响吻合效果,电动吻合器的吻合效果符合临床要求。

    Abstract:

    A new type of electric stapler is developed to solve the problems of insufficient rotation angle, inconve nient operation and difficulty in grasping the pressing strength of existing products. Methods: An electric stapler was designed and machined. the motion trajectory curve of the prototype was measured by using the three-coordinate imaging instrument to build the functional test platform of the prototype, and the goodness of fit was used to evaluate the consistency between the theoretical curve and the measured curve. The fresh pig's small intestine tissues were anastomosed at the front end of different bending angles, and the forming rate of the anastomotic stoma was measured. Result: The goodness of fit between the test curve and the theoretical curve of turning motion and shooting motion was ideal, while the goodness of fit between the test curve and the theoretical curve of pressing motion was not ideal when the turning joint was bent at 0 degrees, and was ideal when it was bent at 15 degrees to 60 degrees. In the performance test, the deformity rate of the nail was less than 1.14%, which indicated that the bending angle had no significant effect on the anastomotic effect. Conclusion: The kinematics curves of shooting and turning motion are consistent with theoretical curves. The pressing motion curves fluctuates at different bending angles, but does not affect the anastomotic effect, and the effect of the electric stapler meets the clinical requirements.

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  • 收稿日期:2019-09-29
  • 最后修改日期:2019-11-26
  • 录用日期:2019-12-03
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