Pedicle Fastener Placement System with Adjustable Alignment
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Solution Overview
Problem
Current pedicle screw placement methods in spinal surgery rely heavily on manual estimation and visual alignment, which can lead to inaccuracies and increased risks of spinal deformities and nerve damage.
Innovation Solution
A pedicle fastener placement system that includes a frame with an adjustable horizontal portion and an insertion assembly with an angle adjustment mechanism and locking mechanism, allowing for precise alignment and controlled insertion of pedicle fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual estimation and visual alignment are used for pedicle fastener placement, then the surgical procedure is simple and quick, but the placement accuracy is poor and the risk of spinal deformities increases
Solution Approach 1:
The patent introduces a pedicle fastener placement system as an intermediary device between the surgeon and the pedicle fastener. This system includes a guide assembly with alignment features and a driver assembly that mediates the insertion process, providing mechanical guidance and control to achieve accurate placement without relying solely on manual estimation
Solution Approach 2:
The system performs preliminary alignment and positioning actions before the actual fastener insertion. The guide assembly is first positioned and aligned with the pedicle, and the driver assembly is pre-configured with the fastener, ensuring that all alignment corrections are made before the critical insertion moment
2Manufacturing precision
If traditional visual alignment methods are used, then the surgical procedure is straightforward, but the alignment precision and stability are insufficient
Solution Approach 1:
The placement system incorporates self-aligning features where the guide assembly automatically positions itself relative to anatomical landmarks, and the driver assembly self-adjusts to maintain proper alignment during insertion, reducing the skill level and effort required by the surgeon
Solution Approach 2:
The system includes movable and adjustable components that allow dynamic adaptation during the surgical procedure. The guide assembly can be adjusted to accommodate variations in patient anatomy, and the driver assembly can be repositioned as needed, providing both precision and ease of operation
3Reliability
If no alignment control mechanism is used, then the surgical procedure is simple, but the risk of nerve damage and spinal deformities increases
Solution Approach 1:
The placement system is divided into distinct functional segments: a guide assembly for alignment, a driver assembly for insertion, and a fastener component. This segmentation allows each part to be optimized for its specific function while working together to improve overall reliability and reduce risks
Solution Approach 2:
The system incorporates visual and mechanical feedback mechanisms that allow the surgeon to verify proper alignment before and during insertion. The guide assembly provides visual cues for correct positioning, and the driver assembly maintains controlled insertion depth, creating a feedback loop that enhances surgical reliability
Data Source
AI summary
Disclosed herein are novel pedicle fastener placement systems and methods for more controlled and precise fusion surgery, reducing the risks associated with spinal fixation procedures. The system includes a frame with a connected handle on one portion and connected to an insertion assembly on a second opposite end. The method includes the steps of conducting a pre-operative computed tomography scan of a patient's spine to determine an insertion point and an insertion route. The method further includes using the pedicle fastener placement system to insert a pedicle fastener at the predetermined insertion point on the pedicle, through the predetermined insertion route.