Spinal Plate Holder with Radially Movable Tangs
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Solution Overview
Problem
Current surgical techniques for treating spinal disorders, such as scoliosis and degenerative disc disease, face challenges in maintaining stability and visibility during procedures, particularly in laminoplasty, where hinge closure can lead to restenosis and limited preservation of motion.
Innovation Solution
A surgical system featuring a plate holder with a center shaft and outer tube, equipped with radially movable tangs and a capture mechanism, allowing for secure engagement and manipulation of spinal plates at varying orientations, reducing the footprint for improved visibility and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a plate holder with a larger footprint is used to securely engage spinal plates, then plate engagement stability is improved, but surgical site visibility deteriorates
Solution Approach 1:
The plate holder is divided into multiple functional components including a body, tangs, and capture mechanisms that can independently engage the plate. This segmentation allows each component to contribute to stability while maintaining an overall compact structure that minimizes footprint.
Solution Approach 2:
The tangs are designed to be retractable into the plate holder body, and the capture mechanism is integrated within the holder structure. This nesting approach allows the device to maintain a small footprint during storage and insertion while expanding to provide stable engagement when needed.
2Device complexity
If traditional surgical techniques are used for laminoplasty, then procedural simplicity is maintained, but hinge closure leading to restenosis occurs
Solution Approach 1:
The plate is engaged and secured to the lamina before the hinge closure occurs. The capture mechanism holds the plate in place during the surgical procedure, ensuring proper positioning and stabilization prior to the critical hinge closure step, thereby preventing restenosis while maintaining procedural simplicity.
Solution Approach 2:
The plate holder acts as an intermediary device that temporarily holds the plate and facilitates its secure attachment to the lamina. This intermediary mechanism enables reliable plate engagement without requiring complex surgical techniques or multiple instruments.
3Area of stationary object
If the plate holder is designed with a compact footprint, then surgical site visibility is improved, but plate engagement capability may be compromised
Solution Approach 1:
The tangs are designed to be axially translatable and radially movable, allowing them to dynamically adjust their position during plate engagement. This dynamic capability enables the compact plate holder to effectively capture and secure plates of various sizes and orientations despite its small footprint.
Solution Approach 2:
The capture mechanism utilizes parameter changes in the tangs' position and orientation to achieve effective plate engagement. By changing the axial and radial parameters of the tangs, the device can adapt to different plate configurations while maintaining a compact overall structure.
Data Source
AI summary
A surgical instrument includes a first member defining an axis and a second member having at least one capture element. The at least one capture element being axially translatable relative to the first member such that the at least one capture element is outwardly radially movable relative to the axis and inwardly radially movable relative to the axis to capture a spinal plate. Systems, implants and methods are disclosed.