Inherent silicone based sensor elements for actively deformable, fluidically actuated medical devices

用于主动变形、流体驱动医疗设备的固有硅基传感器元件

• 批准号: 241357279
• 负责人: Professorin Dr.-Ing. Lena Zentner
• 金额: --
• 依托单位: Fachgebiet Mechanismentechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/241357279?language=en
• 关键词: Inherent; silicone; based; sensor; elements

The aim of the project is the basic investigation of compliant sensor elements made of conductive silicone with regard to medical instrumentation. The basis for this is the preliminary work on the integration of a compliant actor system into the medical instruments using the example of an electrode carrier (EC) for cochlear implants (CI). As a logically consistent amendment, within this follow-up project the feedback about deformation states and / or interaction forces with the surrounding tissue during insertion of the instruments is to be followed by an inherent, likewise compliant sensor technology (by means of material and functional coherence).In order to obtain the advantages of compliant instrumentation despite the integration of sensors, only compliant sensor elements made of conductive silicone are used. This material is just as flexible as the basic material of the instruments and the already developed actuator system. Additionally, the material is electrically conductive so that it changes its electrical resistance as a function of the material elongation.Within the follow-up project, the possibilities and limitations of compliant sensor technology shall be investigated. The focus are the identification of relevant design parameters, which must be taken into account in the design process of sensory areas, as well as the development of an analytical-model-based synthesis method for inherent sensor technology. This also includes the establishment of necessary methods for shaping, structuring and contacting the sensor elements. Due to the scaling of the instrumentation, embodied as a compliant rod-shaped fluid-mechanical actuator (FMA), within the framework of modeling, differently sized instruments are considered. This is intended to exploit the limits of miniaturization. As an example of a FMA with sensors, the electrode carrier of a CI system is chosen because of the particularly demanding requirements for miniaturization and the careful procedure of insertion. In order to develop the interactions and laws of contact forces between the implant and the surrounding tissue, as well as the internal deformations that can be detected by the sensor system, the numerical models of the electrode carrier are verified with the experimental investigations and further developed in an iterative process. For the necessary, realistic models, physiological characteristics of the cochlea are determined experimentally and the morphological diversity of the human cochlea is to be categorized.Finally, the work results in a functional demonstrator setup of an CI electrode carrier with inherent sensor technology and which can be actuated. Afterwards, the fundamentals developed in the project will also form a basis for sensorized, fluidically actuated compliant endoscopes and catheters and thus for further surgical applications.

该项目的目的是对医疗仪器中由导电硅胶制成的合规传感器元件进行基础研究。其基础是以人工耳蜗 (CI) 的电极载体 (EC) 为例，将顺从执行器系统集成到医疗仪器中的初步工作。作为逻辑上一致的修改，在该后续项目中，在仪器插入期间有关变形状态和/或与周围组织的相互作用力的反馈将遵循固有的、同样顺应的传感器技术（通过材料和功能的一致性）。尽管集成了传感器，但为了获得顺应仪器的优势，仅使用由导电硅胶制成的顺应传感器元件。这种材料与仪器和已开发的执行器系统的基本材料一样灵活。此外，该材料具有导电性，因此其电阻会随着材料伸长率的变化而变化。在后续项目中，应研究兼容传感器技术的可能性和局限性。重点是确定传感区域设计过程中必须考虑的相关设计参数，以及开发基于分析模型的固有传感器技术综合方法。这还包括建立用于塑造、构造和接触传感器元件的必要方法。由于仪器的缩放，体现为柔顺杆状流体机械致动器（FMA），在建模框架内，考虑了不同尺寸的仪器。这样做的目的是为了利用小型化的局限性。作为带有传感器的 FMA 的示例，选择 CI 系统的电极载体是因为对小型化和仔细的插入过程有特别苛刻的要求。为了开发植入物与周围组织之间的接触力的相互作用和规律，以及传感器系统可以检测到的内部变形，电极载体的数值模型通过实验研究进行验证，并在迭代过程中进一步发展。为了获得必要的、真实的模型，通过实验确定耳蜗的生理特征，并对人类耳蜗的形态多样性进行分类。最后，这项工作产生了具有固有传感器技术且可以驱动的 CI 电极载体的功能演示器设置。此后，该项目中开发的基础知识也将为传感、流体驱动的顺应性内窥镜和导管奠定基础，从而为进一步的外科应用奠定基础。