Magnetic Targeting for Insertion of Distal Screws into Intramedullary Nails

描述(申请人提供)：在过去的20年里，许多帮助外科医生在长骨髓内钉(IMN)固定装置中定位和钻孔的技术已经被研究。在加快手术速度、简化程序或提高植入物性能方面，没有一家公司在不造成其他问题(辐射暴露、成本、复杂性)的情况下成功。Koronis Biomedical Technologies(KBT)提出了一种基于巨磁电阻(GMR)技术的系统，该系统提供了比其他当前方法更精确的定位能力。在这个第一阶段的SBIR项目中，KBT将设计和制作一种磁性定位系统，用于将螺钉插入髓内钉的远端孔中。建议的系统将允许骨科医生容易和快速地定位远端孔，从骨骼外部将钻头/螺丝钉的位置与孔对齐，并将钻头/螺丝钉与指甲中两个相对孔的轴线定向。提出的方案使用固态薄膜巨磁电阻(GMR)磁场传感器来缩小磁靶向系统的尺寸，提高性能，并降低成本。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。公共卫生报道：Koronis Biomedical Technologies提出了一种磁靶向系统，使用固态薄膜巨磁电阻(GMR)传感器将螺丝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.