Tibial Osteotomy Guide With Overlapping Soft-Tissue Retractor
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Solution Overview
Problem
Existing guide devices for tibial condylar valgus osteotomy (TCVO) lack the ability to accurately guide bone cutting tools while protecting soft tissues such as the popliteal artery and vein and the tibial nerve during vertical osteotomy, leading to potential damage and complications.
Innovation Solution
A guide device comprising a guide portion, retractor portion, connection portion, and fixing portion that securely attaches to the tibia, guiding bone cutting tools in a precise manner while protecting soft tissues by positioning the retractor portion to overlap the guide hole, and utilizing adjustable mechanisms for alignment and fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide device is used to guide bone cutting tools for vertical osteotomy, then cutting precision is improved, but soft tissues such as popliteal artery, vein and tibial nerve may be damaged due to lack of protection
Solution Approach 1:
The guide device is divided into distinct functional segments: a guide portion for precise bone cutting guidance, and a retractor portion for soft tissue protection. This segmentation allows each component to perform its specific function optimally without interfering with the other, resolving the contradiction between cutting precision and tissue safety.
Solution Approach 2:
The retractor portion acts as an intermediary protective element positioned between the bone cutting tool and the soft tissues. It provides a physical barrier that prevents direct contact between the cutting instrument and vulnerable structures like the popliteal artery, vein and tibial nerve, thereby eliminating the harmful effect while preserving cutting accuracy.
2Object-affected harmful factors
If the retractor portion is positioned to overlap the guide hole, then soft tissue protection is improved, but device complexity increases
Solution Approach 1:
The guide portion and retractor portion are merged into a single integrated device structure connected by a connection portion. This combination allows the device to provide both guidance and protection functions simultaneously without requiring separate instruments, thereby reducing overall procedural complexity despite the enhanced protective capability.
Solution Approach 2:
The guide device is designed with multi-functionality, where the same device structure serves dual purposes: the guide portion ensures precise bone cutting while the retractor portion provides soft tissue protection. This universal design eliminates the need for multiple separate tools, simplifying the surgical workflow despite the increased functional capabilities.
Data Source
AI summary
A guide device includes: a guide portion guiding a bone cutting tool; a retractor portion arranged so as to be spaced apart from the guide portion in a first direction; a connection portion that connects the guide portion and the retractor portion; and a fixing portion that fixes the guide portion with respect to the tibia. The guide portion has a guide hole penetrating the guide portion in the first direction and extending in a second direction intersecting the first direction. The retractor portion is disposed in a region overlapping at least the guide hole in a plan view in the first direction.