OrthoAdjust - Shoulder Balancer

** 未满足需求 **：与膝关节和髋关节置换术相比，肩关节置换术（SA）在优化植入物固定和软组织平衡方面是一项具有挑战性的手术。关节盂中植入物组件固定不良易使植入物变形，微动增加松动风险。因此，预先设置肩部肌肉的正确被动张力与实现关节盂组件的最佳定向和固定同样重要。目前，关节盂试模过程中的软组织张力和被动活动范围（ROM）是使用可互换的夹具手动评估的，以调整试模的高度，这是劳动密集型的，并取决于外科医生的经验。**我们的解决方案：**OrthoAdjust使用微型螺线管棘轮螺钉可调机制（高度<4 mm），可自动调节关节盂试模表面的高度、斜度和滚动，从而比手动调节更精确地控制植入物位置。OrthoAdjust使用连接到嵌入外帽的杠杆上的传感器同时测量盂肱关节力，这有助于患者实现不受限制的无痛活动。**方法：**OrthoAdjust基于微型“带式扳手”的原理，使用一对通电的微型扳手，使棘轮以来回振荡的动作旋转，以拧紧或松开螺纹螺钉。反过来，轮驱动丝杠“腿”通过一个孔转换成线性驱动旋转。三对驱动器形成稳定的三脚架，用于调节表面的俯仰和侧倾。**项目团队：** 汇集了一家大型公司（Smith+Nephew）和一家小公司（Marturion-Electronics），他们在医疗器械、低功耗电路和微执行器方面拥有综合专业知识。**关键目标/重点 **：将OrthoAdjust从有线实验室演示器（TRL-4）开发为在肩部尸体上测试的无线设备（TRL-6/7），可作为独立的术中软组织平衡器或更复杂的机器人辅助手术的辅助设备销售。**针对性改进：* 微型螺线管（绕组/直径/电流）* 棘轮（直径）* 丝杠（尺寸/螺距）* 最佳摩擦力;“拉动”和“复位”模式，* 试验尺寸/可扩展性;超小型、小型、中型、大型，* 板载电源/数据管理。

**Unmet Need**:Shoulder arthroplasty (SA) is a challenging procedure to perform, compared to knee and hip arthroplasties, in terms of optimizing implant seating and soft tissue balancing. Poor implant component seating in the glenoid predisposes the implant to deformation, and micromotion increasing the risk of loosening. Consequently, pre-setting the correct passive tension in the shoulder muscles is as important as achieving optimum orientation and fixation of the glenoid components. Currently, soft tissue tension and passive range-of-motion (ROM) during glenoid trialing are assessed manually using interchangeable shims to adjust the height of the trial, which is labour-intensive, and dependent upon surgeon experience.**Our Solution:**OrthoAdjust uses a micro-solenoid ratcheting screw adjustable mechanism (<4mm high) that automatically adjusts the height, pitch and roll of the glenoid trial surface proving finer control of implant position than manual shims. OrthoAdjust simultaneously measures glenohumeral forces using sensors attached to cantilevers embedded in the outer cap, which help patient achieve unrestricted pain-free mobility.**Approach:**OrthoAdjust is based upon the principle of a miniature "strap-wrench" using a pair of energized micro-solenoids that ratchet a wheel to rotate in a back-and-forth oscillatory action to either tighten or loosen a threaded screw. In turn, the wheel drives a leadscrew "leg" through a hole converting rotary into linear actuation. Three pairs of actuators create a stable tripod for adjusting the pitch and roll of the surface.**Project team:**brings together a large (Smith+Nephew) and a small company (Marturion-Electronics) with combined expertise in medical devices, low-powered circuits and micro-actuators.**Key Objectives/Focus**:Development of OrthoAdjust from a wired lab-demonstrator(TRL-4) to a wireless device tested on shoulder cadavers(TRL-6/7), which can be marketed as either a standalone intra-operative soft-tissue balancer or an adjunct for more complex robot-assisted procedures.**Targeted Improvements:*** Micro-solenoid (windings/diameter/current)* Ratchet wheel (diameter)* Lead screw (size/pitch)* Optimum frictional forces;"pull" and "reset" mode,* Trial size/scalability;extra-small,small,medium,large,* On-board power/data management.