Reusable Surgical Guide for Accurate Hallux Valgus Wire Placement
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Solution Overview
Problem
Existing surgical guides for osteosynthesis surgery in hallux valgus correction require multiple radiographic images, are not intuitive to use, and pose a risk of screw interference due to improper wire placement, leading to mechanical weakness and potential surgery failure.
Innovation Solution
A reusable surgical guide with a grip, trigger, blade, and aiming piece that allows for precise wire insertion and adjustment, minimizing the need for radiographic images and preventing screw interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radiographic images are used to guide wire insertion, then wire placement accuracy is improved, but patient radiation exposure increases
Solution Approach 1:
The surgical guide performs preliminary actions by pre-calculating and pre-marking the optimal wire insertion paths on the metatarsus bone before surgery. The guide includes pre-defined guide holes and alignment features that establish the correct wire trajectory in advance, eliminating the need for multiple radiographic images during the wire insertion process itself.
Solution Approach 2:
The surgical guide acts as an intermediary tool between the surgeon and the bone structure. It provides a physical template with guide holes and alignment features that mediate the wire insertion process, allowing precise wire placement without requiring real-time radiographic imaging for guidance.
2Ease of manufacture
If the surgical guide is made reusable, then cost is reduced, but cleaning and sterilization complexity increases
Solution Approach 1:
The surgical guide is segmented into distinct functional components: a handle portion, a blade portion for bone engagement, and a guide hole system. This segmentation allows each component to be independently cleaned and sterilized while maintaining the overall reusable structure. The modular design facilitates easier disassembly for processing.
Solution Approach 2:
The surgical guide incorporates adjustable parameters including variable guide hole positions and angles that can be modified during sterilization processes. The guide is designed with material properties and structural parameters that are compatible with autoclaving and other sterilization methods, maintaining its functional characteristics after repeated use and cleaning.
3Productivity
If wire insertion is performed without proper guidance, then surgery speed is improved, but screw interference and mechanical weakness increase
Solution Approach 1:
The surgical guide provides self-service functionality by automatically defining the correct wire insertion paths through its pre-configured guide holes and alignment features. The guide holes are positioned and angled to ensure proper wire orientation, eliminating the need for surgeon judgment or real-time adjustment, thus preventing screw interference while maintaining speed.
Solution Approach 2:
The guide performs preliminary action by pre-establishing the optimal wire trajectories through its physical structure before the surgeon begins wire insertion. The guide holes are pre-positioned at the correct angles and locations, ensuring that wires are inserted automatically in the correct orientation without requiring real-time guidance or adjustment.
4Object-affected harmful factors
If the guide is designed for mini-invasive approach, then tissue damage is reduced, but wire placement precision becomes more difficult to achieve
Solution Approach 1:
The surgical guide serves as an intermediary that bridges the gap between minimal incision requirements and precise wire placement. The guide includes external alignment features and guide holes that mediate the relationship between the small incision site and the deep bone structure, enabling accurate wire insertion through minimal tissue disruption.
Solution Approach 2:
The surgical guide introduces additional dimensional reference points through its three-dimensional structure, including external alignment markings and internally positioned guide holes at specific angles. This adds spatial reference dimensions that enable precise wire placement even through minimal incisions, compensating for the limited access provided by mini-invasive surgery.
Data Source
AI summary
A reusable surgical guide for osteosynthesis surgery, forming an aimer for guiding and inserting axial wires into bone portions. The guide includes a grip constituted by a head extending at the upper end of a base, a trigger adapted to be displaced in a first slide formed in the head of the grip and whose distal end is provided with a through hole for the insertion of a wire, a blade secured to the distal end of the head of the grip, under the trigger, and a so-called aiming piece adapted to be displaced in a second slide formed in the base of the grip. The aiming piece includes at the distal end thereof means for supporting at least one wire.