Dual-Sided Rod Bender With Adjustable Rollers
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Solution Overview
Problem
Surgical instruments for bending fixing rods in medical procedures, such as spinal stabilization, often require adjustable mechanisms to accommodate varying rod diameters and anatomical complexities, but existing tools lack dual-sided configurations with distinct mechanical advantages for efficient bending.
Innovation Solution
A dual-sided rod bender with pivotably coupled handles and adjustable rollers on each side, providing different mechanical advantages for bending rods of varying diameters, allowing for precise contouring and bending of rods with distinct angles and diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-sided rod bender is used, then the device complexity is low, but the adaptability to different rod diameters and bending angles is limited
Solution Approach 1:
The rod bender is divided into two distinct sides (first side and second side), each with its own set of rollers (first, second, third rollers on first side; fourth, fifth, sixth rollers on second side). Each side can be independently configured for different bending angles and rod diameters, allowing the device to handle multiple surgical scenarios without requiring multiple separate tools.
Solution Approach 2:
The dual-sided design creates a universal tool that can perform multiple functions: the first side is optimized for bending rods at a first angle, while the second side is optimized for bending rods at a second angle. Both sides feature adjustable rollers that can accommodate various rod diameters, making the single device universally applicable to different surgical requirements.
2Adaptability or versatility
If fixed geometry rollers are used, then the manufacturing precision is high, but the adaptability to varying rod diameters is reduced
Solution Approach 1:
The rollers are designed with adjustable geometries rather than fixed configurations. The first and fourth rollers, second and fifth rollers, and third and sixth rollers can be positioned at different locations along the handles, allowing the mechanical advantage and bending radius to be dynamically adjusted based on the specific rod diameter and desired bend angle, while maintaining manufacturing precision through controlled adjustment mechanisms.
3Force
If high mechanical advantage is provided for all configurations, then the force required for bending is reduced, but the device complexity increases
Solution Approach 1:
Each side of the rod bender is designed with specific roller geometries and positions optimized for its intended bending angle. The first side features a first geometry with rollers positioned to provide high mechanical advantage for bending at the first angle, while the second side features a second geometry optimized for the second angle. This localized optimization ensures high mechanical advantage is achieved where needed without requiring complex adjustment mechanisms for the entire device.
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
Enables efficient and precise bending of rods with different diameters and angles, reducing the force required for bending, and accommodating various anatomical needs, enhancing the effectiveness of spinal stabilization surgeries.
Implementation Method 1
a first geometry defined by the first, second, and third rollers may be configured to provide a first mechanical advantage for bending a rod and a second geometry defined by the fourth, fifth, and sixth rollers may be configured to provide a second mechanical advantage for bending a rod
Data Source
AI summary
A dual-sided rod bender for contouring a rod is disclosed. The rod bender may include a first handle and a second handle pivotably coupled together and extending in a longitudinal direction, respectively, from a proximal end to a distal end. A first side of the rod bender may include a first roller adjacent the distal end, a second roller adjacent the distal end, and a third roller disposed between the first roller and the second roller. A second side of the rod bender may include a fourth roller adjacent the distal end, a fifth roller adjacent the distal end, and a sixth roller disposed between the fourth roller and the fifth roller. The first side may be configured apply a first mechanical advantage to bend a rod and the second side may be configured to apply a second mechanical advantage to bend a rod.