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Vacuum packed particles as flexible endoscope guides with controllable rigidity

机译：真空包装的颗粒作为柔性内窥镜引导，具有可控制的刚性

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摘要

In order to fully benefit from the functionalities of flexible endoscopes in surgery a simple shaft-guide that can be used to support the flexible endoscope shaft is required. Such a shaft-guide must be flexible during insertion into the human body and rigidified when properly positioned to support the flexible endoscope shaft. A shaft-guide called 'Vacu-SL' was designed, consisting of a foil tube, filled with particles, that is rigidified by creating a vacuum in its tube. It is expected that the bending stiffness of a loaded, rigidified Vacu-SL shaft-guide is significantly influenced by the shape, hardness and size of the filler particles used. The goal of this study was to find the relations between the filler particles' size, shape and hardness and a rigidified Vacu-SL shaft-guide's bending stiffness. Vacu-SL test models were made using polystyrene, acrylic glass, glass, steel, and corundum particles as spheres, pebbles and granulate, with average diameters between 0.16-1.7 mm. These test models were rigidified and then loaded in a tensile tester. The forces needed for 5 and 10 mm deflections of the rigidified test models were measured. The results show that particle size, shape and hardness all influence a rigidified Vacu-SL shaft-guide's bending stiffness. Size and hardness showed an optimum and granules performed better than spheres. Although the maximally measured bending stiffness might be insufficient to enable proper guidance of flexible endoscope shafts, the results suggest several ways to successfully improve the Vacu-SL shaft-guide.
机译：为了在手术中充分利用柔性内窥镜的功能，需要一种可用于支撑柔性内窥镜轴的简单的轴导向器。这样的轴引导件在插入人体时必须是柔性的，并且在适当地定位以支撑柔性内窥镜轴时必须刚性。设计了一种称为“ Vacu-SL”的轴向导引装置，该装置由一个装有颗粒的箔管组成，该箔管通过在其管中产生真空而得以硬化。可以预料，加载的刚性Vacu-SL轴导向装置的弯曲刚度会受到所用填料颗粒的形状，硬度和尺寸的显着影响。这项研究的目的是找到填料颗粒的尺寸，形状和硬度与刚性Vacu-SL轴导向器的弯曲刚度之间的关系。 Vacu-SL测试模型是使用聚苯乙烯，丙烯酸玻璃，玻璃，钢和刚玉颗粒作为球形，小卵石和颗粒状制成的，平均直径在0.16-1.7毫米之间。这些测试模型被加固，然后加载到拉伸测试仪中。测量了刚性测试模型挠曲5毫米和10毫米所需的力。结果表明，粒径，形状和硬度均会影响刚性Vacu-SL轴导向器的弯曲刚度。尺寸和硬度显示出最佳值，并且颗粒的性能优于球形。尽管最大测量的弯曲刚度可能不足以正确引导柔性内窥镜轴，但结果提出了几种成功改善Vacu-SL轴导管的方法。

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  • 来源
    《Granular matter》 |2010年第6期|p.543-554|共12页
  • 作者

    Arjo J. Loeve; rnOscar S. van de Ven; rnJohan G. Vogel; rnPaul Breedveld; rnJenny Dankelman;

  • 作者单位

    Department BioMechanical Engineering, Faculty 3mE,Delft University of Technology, Mekelweg 2, 2628 CD,Delft, the Netherlands;

    rnDepartment BioMechanical Engineering, Faculty 3mE,Delft University of Technology, Mekelweg 2, 2628 CD,Delft, the Netherlands;

    rnDepartment BioMechanical Engineering, Faculty 3mE,Delft University of Technology, Mekelweg 2, 2628 CD,Delft, the Netherlands;

    rnDepartment BioMechanical Engineering, Faculty 3mE,Delft University of Technology, Mekelweg 2, 2628 CD,Delft, the Netherlands;

    rnDepartment BioMechanical Engineering, Faculty 3mE,Delft University of Technology, Mekelweg 2, 2628 CD,Delft, the Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    size; shape; hardness; vacuum; shaft-guide; endoscopy;

    机译：尺寸;形状;硬度;真空;轴导向内窥镜检查;

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