Bone Traction Device With Double-Joint Mechanism
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Solution Overview
Problem
Current bone traction devices require multiple surgeons to apply significant force for fracture reduction, leading to inefficiencies and difficulties in accurately adjusting bone fragment positions, and existing solutions like surgical navigation robots are bulky and inefficient.
Innovation Solution
A bone traction device with a double-joint mechanism, dynamics sensor, and compact design that allows for fine adjustment and remote operation, featuring a base, vertical support, traction shaft, and gripping member, enabling precise bone fragment alignment with reduced physical burden on surgeons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If multiple surgeons manually apply traction force for fracture reduction, then the fracture reduction can be performed with sufficient force, but the physical burden on surgeons increases and manpower efficiency decreases
Solution Approach 1:
The patent replaces the manual mechanical traction system with an automated robotic system. The robot applies traction force through a mechanical interface that connects to the bone fragment, eliminating the need for multiple surgeons to manually tow the fractured portion. The robotic system can sustain the required 200-400 N traction force while reducing manpower requirements from multiple surgeons to a single operator controlling the robot.
Solution Approach 2:
The robotic system performs the traction function autonomously once programmed with the treatment plan. The robot self-regulates the application of traction force according to pre-calculated parameters, eliminating the need for continuous manual adjustment by surgeons and enabling the system to serve itself in maintaining optimal traction conditions throughout the procedure.
2Manufacturing precision
If multiple surgeons manually adjust bone fragment positions, then fine adjustment can be achieved, but the physical burden on surgeons increases
Solution Approach 1:
The robotic system replaces manual mechanical manipulation of bone fragments with automated robotic manipulation. The robot's end effector, equipped with gripping members, can precisely position bone fragments according to the treatment plan without requiring surgeons to physically hold and adjust the fragments, thereby reducing physical burden while maintaining positioning accuracy.
Solution Approach 2:
The robotic system provides dynamic adjustment capability for bone fragment positioning. The robot can make real-time adjustments to fragment positions during the procedure based on feedback from the navigation system and treatment plan requirements, enabling fine adjustments without the physical strain of manual manipulation by multiple surgeons.
3Force
If a fracture table is used for traction, then the fractured portion can be towed, but accurate position adjustment and force measurement become difficult leading to excessive traction
Solution Approach 1:
The robotic system incorporates feedback mechanisms through integration with surgical navigation systems and force sensors. The robot can measure the actual traction force being applied and the position of bone fragments in real-time, comparing these measurements against the treatment plan requirements. This feedback loop enables precise control to prevent excessive traction and ensures accurate position adjustment.
Solution Approach 2:
The robotic system performs multiple functions that were previously separate: it applies traction force, measures the force applied, adjusts bone fragment positions, and verifies positioning accuracy all through a single integrated system. This multi-functionality eliminates the limitations of the fracture table which could only provide mechanical traction without measurement or precise control capabilities.
4Extent of automation
If a surgical navigation robot is used to solve traction problems, then automation is achieved, but the robot volume increases making it incompatible with compact operating room design
Solution Approach 1:
The robotic system is divided into separate functional modules: a mobile base unit, a robotic manipulator arm, and a separate navigation system. This segmentation allows the automation functions to be distributed across compact components rather than requiring a single large robot, enabling the system to fit within the spatial constraints of an operating room while maintaining full automation capabilities.
Solution Approach 2:
The robotic system employs a nested structure where the robotic manipulator arm can be retracted into or alongside the mobile base when not in use. The gripping members and other functional components are nested within the manipulator structure. This nesting approach minimizes the overall volume occupied by the robot in the operating room while preserving full automation functionality during operation.
Data Source
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AI summary
A bone traction device and a fracture reduction system including the same are disclosed. The disclosed bone traction device comprises: a base; a support vertically disposed on the base; a traction shaft provided at the support in a perpendicular direction and driven in forward and backward directions; and a double-joint part connected to the traction shaft so as to be bent in multiple stages with respect to the driving direction of the traction shaft.