Robotic Rod Bending Module for Precise Intraoperative Shaping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current robotic surgical systems are hindered by high costs, complex preoperative planning requirements, physical intrusiveness, non-intuitive operation, and vulnerability to malfunction or operator error, particularly in tasks like spinal rod bending, which often result in suboptimal rod curvature and mechanical strength.
Innovation Solution
A rod bending module integrated with a robotic surgical system that allows for precise, intraoperative bending of rods using a force die and bend die, with a fixation apparatus for secure attachment to the robotic system, enabling controlled bending within the operating room to match desired spinal or bone curvatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual bending tools are used to bend rods, then the rod can be shaped to fit screw positions, but the mechanical strength of the rod decreases due to curbs and multiple bending corrections
Solution Approach 1:
The patent replaces manual mechanical bending tools with a robotic system that uses controlled mechanical forces through a bending module. The robotic arm positions and applies precise forces to bend the rod without creating harmful curbs, substituting imprecise manual mechanics with controlled robotic mechanics that preserve rod integrity
Solution Approach 2:
The patent changes the bending process parameters by using a robotic system that applies controlled force magnitude, direction, and duration. The robotic system can adjust bending parameters in real-time based on rod material properties and desired curvature, avoiding the fixed, imprecise parameters of manual bending that compromise strength
2Measurement precision
If a robotic arm is used to bend rods, then precision and control are improved, but the robotic arm must be large and unwieldy to provide sufficient forces and torques
Solution Approach 1:
The patent segments the bending system into a lightweight robotic arm for positioning and a separate bending module attached to the operating table for force application. This division allows the robotic arm to remain small and maneuverable while the bending module provides the necessary forces through the table structure
Solution Approach 2:
The patent introduces an intermediary bending module that acts as a force amplifier between the lightweight robotic arm and the rod. The module uses the operating table as a reaction mass, allowing the small robotic arm to control large bending forces without needing to be physically large or heavy
3Manufacturing precision
If extensive preoperative surgical planning is required, then surgical precision can be improved, but the preparation time in the operating room is extended
Solution Approach 1:
The patent performs preliminary actions by pre-programming the robotic system with ideal spinal curves and bending parameters before surgery. However, it also enables intraoperative adjustment of rod curvature based on actual screw positions, reducing the need for extensive preoperative planning while maintaining precision through real-time robotic control
4Measurement precision
If robotic systems are used to filter out tremors and enable precise movements, then surgical precision is improved, but the systems become expensive to own and maintain
Solution Approach 1:
The patent uses a modular robotic bending module that can be attached to standard operating tables, avoiding the need for expensive dedicated robotic surgical systems. The module design suggests reusability across multiple procedures, reducing per-procedure costs while maintaining precision through robotic control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies surgeries by enhancing rod mechanical properties and curvature, reducing the risk of screw misplacement and manual bending errors, while maintaining sterility and ease of use, thus improving surgical outcomes and reducing operational complexity.
Implementation Method 1
a force transfer device that transfers energy from an actuator to the force die thereby causing a rod positioned between the force die and the bend die to bend around the bend die
Data Source
AI summary
The disclosed technology relates to a rod bending machine for use with a robotic surgical system in an operating room. The system which is capable to bend rods for surgeries directly in the operating room. The rigidity of the rods is such that the robotic arm alone would have to be huge to provide sufficient forces and torques. This invention introduces bending module integrated into robotic system which allows free bending of rods within limits required for surgeries.