Modular Neck Selection Using Grid Coordinate Templates
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Solution Overview
Problem
Surgeons face challenges during hip replacement surgeries when needing to change preoperatively chosen modular neck components due to variations in leg length, offset, and anteversion, as existing methods require reevaluation of multiple variables, complicating the selection process.
Innovation Solution
A method utilizing a template with a grid coordinate system for preoperative and intraoperative planning, allowing surgeons to quickly select modular neck components based on independent variables like leg length, offset, and anteversion without reevaluating other variables, using a system where one variable is constant, facilitating intuitive selection and minimizing the need for extensive lookup tables or complex calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a template with grid coordinate system is used for selecting modular neck components, then the selection process becomes simpler and faster, but the system complexity increases due to the need for standardized coordinate systems and reference points
Solution Approach 1:
The selection system is segmented into independent modular components: a template with grid coordinate system, reference points corresponding to specific variables (leg length, offset, anteversion), and a modular implant system. This segmentation allows surgeons to selectively adjust one variable at a time without reevaluating others, simplifying the selection process while maintaining systematic organization.
Solution Approach 2:
The patent introduces a grid coordinate system as an additional dimensional framework for selecting modular neck components. By mapping implant variables (leg length, offset, anteversion) to coordinates on a grid, the system transforms a complex multi-variable selection problem into a simpler two-dimensional lookup process, enabling independent adjustment of variables without requiring extensive calculations or reevaluation of other parameters.
2Measurement precision
If multiple variables are reevaluated when changing neck components, then the selection accuracy improves, but the time required for intraoperative changes increases
Solution Approach 1:
The template with grid coordinate system and reference points is prepared in advance, with all possible variable combinations pre-mapped. During surgery, surgeons can quickly locate the desired configuration by simply identifying the relevant coordinate or reference point, eliminating the need for time-consuming reevaluation of multiple variables and extensive calculations during the surgical procedure.
3Adaptability or versatility
If a comprehensive implant system with multiple variables is provided, then the adaptability to different patient anatomies improves, but the complexity of selecting and managing the implant components increases
Solution Approach 1:
The template with grid coordinate system serves as a universal tool that can accommodate multiple implant variables (leg length, offset, anteversion) and different patient anatomies. The standardized coordinate system and reference points provide a common framework that works across the entire modular implant system, allowing surgeons to select appropriate components for diverse patient requirements without needing separate selection methods for each variable or patient type.
Data Source
AI summary
A method for selecting modular neck components for hip implants based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and/or anteversion. The present method allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. The method may include preoperative planning in which a template including a grid coordinate system is used.