Cutting Jig Positioning Tool for Knee Surgery
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Solution Overview
Problem
Existing methods for positioning cutting jigs in navigated knee surgery are complex and time-consuming, requiring multiple pins for fixation, which increases invasiveness and surgery time.
Innovation Solution
A method and device using a positioning tool with a hinged or ball joint mechanism that allows for precise adjustment and fixation of a cutting jig to a bone structure using only two pins, with optional additional pins for secure attachment, and a navigation system for pre-calibration and precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pins are used for fixation of cutting jig, then reliability of attachment is improved, but device complexity and surgery time increase
Solution Approach 1:
The patent extracts and eliminates unnecessary pins from the traditional multi-pin fixation system. By using a cutting jig with integrated positioning features and a reduced pin system (two pins instead of multiple), the invention maintains adequate attachment reliability while significantly reducing device complexity and surgical time.
Solution Approach 2:
The cutting jig is designed with multi-functional features that combine positioning, alignment, and fixation functions into a single device. The integrated positioning elements and reduced pin configuration demonstrate that one device can perform multiple functions that previously required separate components and multiple fixation points.
2Reliability
If multiple pins are used for fixation of cutting jig, then reliability of attachment is improved, but surgery time increases
Solution Approach 1:
The patent removes unnecessary pins from the fixation process, reducing the number of insertion and securing steps. This extraction of redundant fixation elements directly reduces surgery time while maintaining adequate reliability through the optimized two-pin system with proper positioning.
Solution Approach 2:
The cutting jig is pre-designed with integrated positioning features and pre-configured pin holes that align with bone landmarks. This preliminary preparation of the jig design eliminates the need for time-consuming measurements and adjustments during surgery, allowing for rapid attachment with minimal pins.
3Manufacturing precision
If traditional positioning methods are used, then manufacturing precision can be maintained, but ease of operation decreases
Solution Approach 1:
The cutting jig is designed with self-positioning features that automatically align with bone landmarks and surgical guides. The integrated positioning elements and reduced pin system enable the surgeon to achieve precise positioning with minimal manual adjustment, making the attachment process simpler while maintaining manufacturing precision.
Solution Approach 2:
The patent changes the operational parameters by reducing the number of pins from multiple to two, and by integrating positioning features directly into the jig design. This parameter change simplifies the attachment operation while the precision is maintained through the redesigned positioning mechanism that uses fewer, strategically placed pins with improved alignment features.
Data Source
AI summary
The present invention relates to a device for positioning a jig at a structure using at least one fixing element comprising at least one adjusting element which can directly interact with or guide the at least one fixing element and which can interact with the jig, so that the relative position between the at least one fixing element and the jig can be adjusted by changing the position of the at least one adjusting element, as well as to a method for positioning a jig at a structure comprising two rotatable adjusting elements, wherein the resection plane of the jig can be moved along or in a first direction when the adjusting elements are moved in the same direction and wherein the resection plane is turned if the adjusting elements are moved in an opposite or different direction or only one adjusting element is moved.