Development of an Osseo-Magnetic Link for Control of Prosthetic Limb Rotation

开发用于控制假肢旋转的骨磁连接

• 批准号: 7908628
• 负责人: Julio Jose Santos-Munne
• 金额: $ 9.55万
• 依托单位: KINEA DESIGN, LLC
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2011-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7908628
• 关键词: Algorithms; Amputation; Amputees; Arm Bones; Biological Preservation; Characteristics; Clinical; Cognitive; Consumption; Detection; Development; Distal; Electromagnetic Fields; Engineering; Feedback; Forearm; Freedom; Frequencies; Goals; Hand; Implant; Injury; Investigation; Joints; Limb structure; Link; Magnetism; Methods; Modeling; Monitor; Movement; Noise; Orthopedics; Pathway interactions; Pattern Recognition; Performance; Permeability; Phase; Proprioception; Prosthesis; Psyche structure; Research; Research Project Grants; Residual state; Rotation; Scheme; Series; System; Techniques; Technology; Testing; Time; Titanium; Upper Extremity; Wrist; base; bone; disability; disability burden; magnetic field; operation; prototype; public health relevance; radius bone structure; sensor; vector

DESCRIPTION (provided by applicant): The goal of this project is to create an intuitive control scheme for rotation of a prosthetic joint that preserves proprioception of limb rotation. Such a control scheme would reduce the cognitive burden of controlling the prosthetic limb and allow the incorporation of additional prosthesis movements, thus reducing the burden of disability. This project seeks to advance this goal by developing the technology of an osseo-magnetic link for prosthetic wrist rotation. Natural control of wrist rotation and preservation of proprioception will be achieved by implanting a permanent magnet into the distal end of the residual radius bone, and magnetic field sensors into the surrounding prosthetic socket. By sensing the change in magnetic field distribution as the subject rotates their residual forearm bones, the angle of rotation can be calculated and applied to the prosthetic wrist rotator. The intact proprioceptive pathways of the forearm will allow the user to intuitively know the rotation of the residual bone, and, as a result, the rotation of the prosthetic wrist. This proposed project is based on the following aims: 1) optimization of magnetic sensors, 2) optimization of sensing algorithm and 3) robustness testing. Specifically, during this phase we will research available magnetic sensor technologies and select a sensor that provides the best compromise between sensitivity, power consumption and package size. We will also investigate control algorithm refinements with the goal of developing a numerically stable and computationally simple approach. Lastly, we will investigate the effects of external electromagnetic field interference on prototype performance and develop a shielding approach if it is warranted. PUBLIC HEALTH RELEVANCE: Transradial (above wrist) amputation is a debilitating injury and results in severe disability. The goal of this research project is to develop a control technology for transradial prostheses using a magnetic link: a magnet will be placed in the residual arm bone so that a series of sensors can track its rotation and control a motorized wrist rotator. This will allow the user to naturally and intuitively control the rotation of their prosthetic wrist, thus increasing the functionality of the prosthesis and reducing the mental burden of use.

描述（由申请人提供）：本项目的目标是为保留肢体旋转本体感觉的假体关节旋转创建直观的控制方案。这种控制方案将减少控制假肢的认知负担，并允许纳入额外的假肢运动，从而减少残疾的负担。该项目旨在通过开发用于假肢手腕旋转的骨磁链接技术来推进这一目标。通过将永磁体植入剩余桡骨远端，并将磁场传感器植入周围假肢接受腔，可实现腕关节旋转的自然控制和本体感觉的保留。通过感测受试者旋转其残余前臂骨时磁场分布的变化，可以计算旋转角度并将其应用于假体手腕旋转器。前臂的完整本体感受通路将允许使用者直观地知道残余骨的旋转，并且因此知道假腕的旋转。该项目基于以下目标：1）磁传感器的优化，2）传感算法的优化和3）鲁棒性测试。具体而言，在此阶段，我们将研究可用的磁传感器技术，并选择在灵敏度、功耗和封装尺寸之间提供最佳折衷的传感器。我们还将研究控制算法的改进，目标是开发一种数值稳定和计算简单的方法。最后，我们将研究外部电磁场干扰对原型性能的影响，并在必要时开发屏蔽方法。 公共卫生相关性：经桡动脉（腕部以上）截肢是一种使人衰弱的损伤，可导致严重残疾。该研究项目的目标是开发一种使用磁力链接的经桡关节假体的控制技术：将磁体放置在剩余的手臂骨中，以便一系列传感器可以跟踪其旋转并控制电动手腕旋转器。这将允许用户自然和直观地控制他们的假肢手腕的旋转，从而增加假肢的功能并减少使用的精神负担。