Spinal Drill Guide with Alignment Tabs
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Solution Overview
Problem
The implantation of spinal plates during spinal surgery is challenging due to the need for precise alignment and stabilization, as existing devices often require rigid fixation and precise drilling, which can be difficult to achieve and may impinge on adjacent soft tissues.
Innovation Solution
A drill guide device with an elongate shaft and a guide member featuring alignment elements, such as tabs or protrusions, that interact with the spinal plate to align lumens for tool passage, allowing for adjustable positioning and alignment without rigid attachment, facilitating the implantation of spinal plates while minimizing interference with soft tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If rigid fixation is used to stabilize the spinal plate during implantation, then alignment precision is improved, but ease of operation deteriorates due to difficulty in positioning and adjustment
Solution Approach 1:
The guide device incorporates a movable guide member that can be adjusted along the elongate shaft to different positions. This dynamic structure allows the surgeon to easily reposition the guide member for optimal alignment with screw bores, then lock it in place during drilling, combining ease of positioning with alignment precision.
Solution Approach 2:
The guide member acts as an intermediary between the elongate shaft and the spinal plate. It provides a stable reference frame for alignment while allowing independent adjustment, mediating between the need for rigid fixation and ease of positioning by decoupling these functions.
2Manufacturing precision
If precise drilling is performed to achieve accurate screw placement, then manufacturing precision is improved, but device complexity increases due to multiple alignment and fixation requirements
Solution Approach 1:
The device is segmented into distinct functional components: an elongate shaft for stabilization, a movable guide member for positioning, and alignment features integrated into the guide member. This segmentation allows each component to perform its specific function independently, simplifying the overall device while maintaining precision.
Solution Approach 2:
The guide member combines multiple functions into a single component: it provides alignment references, guides the drilling operation, and can be positioned at different locations along the shaft. This merging reduces the number of separate parts needed while achieving precise screw placement.
3Stability of the object's composition
If the guide device is rigidly attached to the spinal plate, then stability is improved, but soft tissue interference increases due to larger device profile
Solution Approach 1:
The guide member can be moved to different positions along the elongate shaft and only rigidly attached when needed for the drilling operation. During positioning and alignment, it remains movable and minimally invasive. This dynamic attachment strategy provides stability during critical operations while minimizing soft tissue interference during positioning.
Solution Approach 2:
The guide device uses a slender, elongate shaft design that minimizes its profile and reduces soft tissue interference. The guide member itself is compact and can be positioned precisely without requiring a large rigid structure, achieving stability through precise positioning rather than bulk.
Data Source
AI summary
A guide device is provided for use with a spinal plate that has at least one pair of screw bores formed therein. The guide device generally includes an elongate shaft having a proximal end and a distal end. A guide member is coupled to the distal end of the elongate shaft and it includes at least one lumen extending therethrough, and at least one alignment element that is positioned distal of the guide member. Each alignment element(s) is adapted to interact with a spinal plate to position the guide member with respect to the spinal plate such that the each lumen in the guide member is aligned with a corresponding screw bore formed in the spinal plate. The guide member can then be used to guide a tool or implant through each lumen in the spinal plate and into bone.