Magnetic Targeting for Insertion of Distal Screws into Intramedullary Nails

描述（由申请人提供）：在过去的20年中，已经研究了许多技术来帮助外科医生在长骨髓内钉（IMN）固定器械中定位和钻孔。在加速手术、简化手术或提高植入物性能而不产生其他问题（辐射暴露、成本、复杂性）方面，没有一项成功。Koronis Biomedical Technologies（KBT）提出了一种基于巨磁阻（GMR）技术的系统，该系统提供比其他现有方法更精确的定位能力。在第一阶段SBIR项目中，KBT将设计并制作一个磁性定位系统的原型，用于将螺钉插入髓内钉的远端孔中。申报系统将允许骨科医生轻松快速地定位远端孔，从骨外将钻头/螺钉的位置与孔对齐，并将钻头/螺钉定向为髓内钉中两个相对孔的轴线。该计划使用固态薄膜巨磁阻（GMR）磁场传感器来减小尺寸，提高性能，并降低磁靶向系统的成本。GMR传感器的制造成本非常低，并且相对于其非常小的体积对磁场非常敏感。 公共卫生救济：Koronis Biomedical Technologies提出了一种磁性定位系统，用于使用固态薄膜巨磁阻（GMR）传感器将螺钉插入髓内钉的远端孔中。

DESCRIPTION (provided by applicant): Many techniques to assist surgeons to locate and drill holes in long-bone intramedullary nail (IMN) fixation devices have been investigated over the past 2 decades. None have been successful in speeding surgery, simplifying procedures or increasing implant performance without creating other problems (radiation exposure, cost, complexity). Koronis Biomedical Technologies (KBT) proposes a system based on giant magneto resistive (GMR) technology that provides more precise location capability than other current methods. In this Phase I SBIR program, KBT will design and prototype a magnetic targeting system used to insert screws into the distal holes of intramedullary nails. The proposed system will allow an orthopedic surgeon to easily and quickly locate the distal holes, align the position of the drill/screw from outside the bone with the holes and orient the drill/screw with the axis of the two opposing holes in the nail. The proposed program uses solid-state thin-film giant magneto-resistive (GMR) magnetic field sensors to reduce the size, increase the performance, and decrease the cost of a magnetic targeting system. GMR sensors are very inexpensive to manufacture and are exquisitely sensitive to magnetic fields relative to their very small volume. PUBLIC HEALTH RELEVENCE: Koronis Biomedical Technologies proposes a magnetic targeting system used to insert screws into the distal holes of intramedullary nails using solid-state thin-film giant magneto-resistive (GMR) sensors.