Offset-Lumen Decompression Guide for Lamina Access and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current surgical procedures for spinal stenosis, such as laminectomy and laminotomy, are invasive and carry risks like nerve or spinal cord damage, particularly due to the removal of posterior tension band ligaments, leading to instability and potential need for spinal fusion.
Innovation Solution
A minimally invasive decompression system and method using an instrument shuttle and working channel to engage and secure a target anatomical location, with a guard plate for protection and a multi-channel guide for instrument advancement, reducing the risk of nerve or spinal cord damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional laminectomy or laminotomy procedures are performed to decompress the spinal canal, then the spinal canal space is increased and nerve compression is relieved, but the posterior tension band ligaments are removed causing spinal instability and potential need for fusion
Solution Approach 1:
The procedure segments the decompression process into two distinct phases: first creating a corridor through the lamina using a Kerrison rongeuer, then using a power burr to remove the lamina. This segmentation allows for controlled removal of bone while preserving the ligamentous structures that maintain spinal stability.
Solution Approach 2:
A power burr is introduced as an intermediary tool between the traditional Kerrison rongeuer and the final decompression goal. The power burr enables more precise and controlled removal of the lamina while minimizing damage to the posterior tension band ligaments, thus achieving decompression without compromising spinal stability.
2Ease of operation
If traditional open surgical procedures are used for decompression, then adequate exposure and access to the spinal canal is achieved, but the invasiveness increases and risk of nerve or spinal cord damage rises
Solution Approach 1:
The procedure replaces traditional manual mechanical removal methods with a power burr system that provides more controlled and precise bone removal. This substitution reduces the risk of accidental nerve or spinal cord damage while maintaining adequate access to the decompression site.
Solution Approach 2:
The procedure uses a combination of partial manual removal with Kerrison rongeuer followed by power burr removal. This partial use of each method allows for controlled progression through the bone layers, reducing the risk of excessive force application that could damage neural structures.
3Object-affected harmful factors
If minimally invasive techniques are used for decompression, then the risk of nerve or spinal cord damage is reduced, but the ability to adequately remove lamina or bone overgrowth is limited
Solution Approach 1:
The procedure utilizes a power burr system that employs rotational mechanical energy to efficiently remove bone. This energy-based approach enables adequate decompression through a minimally invasive corridor, maintaining both safety and effectiveness.
Solution Approach 2:
The procedure employs dynamic control of the power burr speed and feed rate to optimize bone removal efficiency. By adjusting these parameters in real-time, the surgeon can achieve adequate decompression while minimizing the size of the surgical corridor and reducing invasiveness.
Data Source
AI summary
A decompression surgery system includes a cannula configured to engage a lamina, the cannula including a lumen. The system further includes a guide configured to be received by the cannula, the guide including a guide lumen that is offset from the central longitudinal axis of the guide. The guide can be rotated to multiple positions so the guide lumen can be used to access different parts of the lamina. Instruments for laminar decompression such as a drill bit can be advanced through the guide lumen.