Foldable Bone Access Needle Handle for Precise Vertebral Insertion
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Solution Overview
Problem
Existing bone cement delivery needles face challenges in inserting into vertebral bodies due to high insertion forces, complex constructions, and interference with other instruments during operation, leading to reduced control and increased difficulty in vertebroplasty procedures.
Innovation Solution
A foldable handle apparatus with pivoting wings and a telescopic connector design, featuring ergonomic grips and a smooth beveled tip transition, allowing for easier manipulation and reduced interference with other instruments during bone cement delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional rigid handle design is used, then structural strength is maintained, but ease of operation and control are reduced due to interference with other instruments
Solution Approach 1:
The handle apparatus employs a dynamic folding mechanism where the first and second wings can pivot relative to each other about a common axis, transitioning between extended and folded configurations. This dynamic structure allows the handle to adapt its shape during surgical procedures, reducing interference with other instruments while maintaining structural integrity through controlled movement rather than fixed rigid connections.
Solution Approach 2:
The handle is divided into separate modular components including a first wing, a second wing, and a telescopic connector assembly. These segmented parts can be independently positioned and folded, allowing the device to navigate complex surgical spaces. The segmentation enables each component to be optimized for its specific function while collectively providing reduced interference during vertebroplasty procedures.
2Force
If high insertion forces are applied to insert the needle into the vertebral body, then insertion is achieved, but control and precision are reduced
Solution Approach 1:
The telescopic connector allows the handle to dynamically adjust its length and configuration during the insertion process. As insertion force is applied, the telescopic sections can compress or extend, providing a mechanical buffer that maintains control precision. This dynamic adjustment enables the operator to apply necessary insertion force while the flexible connector absorbs excess movement, preserving placement accuracy.
3Ease of operation
If the handle apparatus is kept in an extended configuration, then accessibility is maintained, but interference with other instruments increases
Solution Approach 1:
The folding mechanism enables the handle to dynamically transition between extended and folded states based on the surgical requirements. When accessibility is needed, the wings extend to provide adequate reach and leverage. When instrument interference becomes an issue, the wings can be folded compactly along the common axis, eliminating protrusions that would conflict with other surgical tools in the confined vertebral surgery environment.
4Measurement precision
If a complex construction is used to achieve precise placement, then placement precision is improved, but device complexity and difficulty of operation increase
Solution Approach 1:
The precise placement capability is achieved through segmented modular components rather than a single complex rigid structure. The first wing, second wing, and telescopic connector are separate elements that can be independently positioned and adjusted. This segmentation allows each component to contribute to precision through its specific function while the overall device remains relatively simple in design, avoiding the need for complex mechanisms.
Solution Approach 2:
The telescopic connector serves multiple functions: it provides structural connection between wings, enables length adjustment for different surgical scenarios, absorbs insertion forces, and allows folding motion. This multi-functionality reduces the need for additional specialized components, maintaining device simplicity while achieving precise placement capability through the versatile behavior of each universal component.
Data Source
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AI summary
A handle device is provided comprising a first wing and a second wing. The first wing and the second wing are configured to pivot about a common axis to one another. The first wing has one or more first ridge, and a first one or more clearance spaces. The second wing has one or more second ridges and a second one or more clearance spaces. The one or more first ridges is configured to be received within the second one or more clearance spaces and the one or more second ridges is configured to be received within the first one or more clearance spaces when the first wing is pivoted about the common axis to the second wing in a folded configuration.