Laminar Hook Insertion Device for Spinal Alignment
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Solution Overview
Problem
Existing spinal implant systems face difficulties in inserting hooks under misaligned curvatures and aligning rod receiving portions without distorting or exerting undesired forces, leading to increased surgical time and complications.
Innovation Solution
A surgical hook insertion device with an elongate body and actuation assembly, featuring a retaining portion and actuation rod that transitions between engaging and disengaging positions to facilitate precise placement of laminar hooks under the lamina, utilizing a biasing member and sliding mechanism to manage the actuation rod within a lumen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hooks are inserted under sequential lamina along a misaligned curvature, then spinal alignment is achieved, but the rod receiving portions cannot be precisely aligned with the rod without distorting or tilting the hooks
Solution Approach 1:
The device incorporates a compliant mechanism with a articulation joint that allows the second arm to dynamically adjust its orientation relative to the first arm. This dynamic adjustment enables the rod receiving portions to be precisely aligned with the rod along the spinal curvature without distorting the hooks, while maintaining ease of operation through controlled flexibility.
Solution Approach 2:
The device changes the geometric parameters of the rod holder by allowing articulation between arms. The articulation joint enables variation in the angle and position of the rod receiving portions, adapting to different spinal curvatures and misalignments while maintaining precise alignment capability.
2Productivity
If traditional hook insertion methods are used, then surgical procedure is completed, but operating time is considerably longer leading to increased complications
Solution Approach 1:
The device performs preliminary alignment of multiple hooks simultaneously before final rod insertion. The articulated arms with rod receiving portions are pre-positioned and aligned along the desired spinal curvature, allowing all hooks to be secured in their correct positions before the rod is inserted, thereby reducing surgical time and complications.
Solution Approach 2:
The device serves multiple functions: it holds multiple hooks simultaneously, aligns them along misaligned curvatures, and facilitates rod insertion. This multi-functionality consolidates several surgical steps into one device operation, improving surgical efficiency without compromising reliability.
3Manufacturing precision
If hooks are secured to align rod receiving portions, then proper spinal alignment is achieved, but the process is time consuming and difficult
Solution Approach 1:
The device segments the alignment function into multiple independent articulated arms, each capable of being positioned and secured independently. This segmentation allows each hook to be aligned and fixed in place sequentially without affecting the others, reducing the overall time and difficulty of achieving proper spinal alignment.
Data Source
AI summary
A surgical hook insertion device includes an elongate body defining a lumen therethrough and an actuation assembly. The elongate body has a retaining portion configured and dimensioned to releasably retain a laminar hook therein. The actuation assembly includes an actuation rod and an actuator member. The actuation rod is slideably disposed within the lumen of the elongate body. The actuator member is operatively coupled with the actuation rod and is slideably mounted on the elongate body, wherein the actuation assembly is transitionable between a first position in which a portion of the actuation rod engages the laminar hook releasably disposed in the retaining portion and a second position in which the actuation rod disengages the laminar hook.