Autoclavable Robotic Rod Bender for Precise Notch-Free Bending
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Solution Overview
Problem
Current surgical robotic systems for bending surgical rods in spinal fusion surgeries are cumbersome and introduce notches on the rods, reducing their fatigue life, requiring manual and inefficient processes.
Innovation Solution
A robotic rod bender system with an autoclavable top assembly, including a rod feeding subassembly, brake subassembly, and bending subassembly, driven by motors and a linear actuated elevator assembly, which automatically positions components for precise rod bending without manual intervention and minimizes notching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual bending devices (French bender, power bender) are used to bend surgical rods, then the rod can be bent to desired curvature, but notches are introduced on the rod which decrease fatigue life
Solution Approach 1:
The patent replaces manual mechanical bending devices with an automated robotic system that uses controlled mechanical forces to bend the rod. The robotic arm with specialized end effectors applies precise bending moments without the manual manipulation that causes notching, thereby maintaining rod strength while achieving accurate curvature.
Solution Approach 2:
The robotic system incorporates sensors and control systems that automatically adjust bending parameters based on real-time feedback about rod position and deformation. This self-adjusting capability ensures optimal bending forces are applied, preventing excessive stress and notching while achieving the desired curvature accuracy.
2Manufacturing precision
If manual processes are used to operate bending devices, then the rod can be bent, but the process is cumbersome and inefficient
Solution Approach 1:
The patent replaces manual operation with an automated robotic system controlled by computer software. The robotic arm can be programmed to perform bending sequences automatically, eliminating the need for surgeons to manually manipulate cumbersome bending devices during surgery, thereby improving surgical efficiency while maintaining bending precision.
Solution Approach 2:
The robotic system includes automated positioning, gripping, and bending execution capabilities that operate with minimal human intervention. The system can autonomously navigate to the rod, grip it securely, apply the calculated bending forces, and release it, all without requiring manual repositioning or adjustment by the surgical team.
3Productivity
If automated robotic system is implemented, then surgical efficiency is improved, but device complexity increases
Solution Approach 1:
The robotic system is divided into modular components: a robotic arm with interchangeable end effectors, a separate control system, and integrated sensors. This segmentation allows the complex functionality to be distributed across independent modules that can be individually maintained and replaced, reducing the practical complexity burden despite the system's advanced capabilities.
Solution Approach 2:
The robotic system is designed with universal end effectors and standardized interfaces that can accommodate different rod sizes and bending requirements. This multi-functionality reduces the need for multiple specialized devices, thereby managing complexity through consolidation while maintaining high surgical efficiency across various spinal correction procedures.
Data Source
AI summary
A robotic rod bender is disclosed. The robotic rod bender includes an autoclavable top assembly that includes a rod feeding subassembly, a brake subassembly, and a bending subassembly. The rod bending subassembly, the bending subassembly, and the brake assembly are disposed on a top plate. The robotic rod bender also includes a motor housing that includes one or more motors, a spline shaft, and a linear actuated elevator assembly. The linear actuated elevator assembly includes a linear actuator, a movable plate, and a mid-plate. The spine shaft extends from the moveable plate. The autoclavable top assembly is removably disposed atop the mid-plate.