Modular Orthopaedic Component Case with Grid Coordinate Planning
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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 patient anatomy, requiring evaluation of multiple variables and complex calculations to select optimal implants.
Innovation Solution
A system utilizing a template with a grid coordinate system for preoperative planning and intraoperative selection of modular neck components, allowing surgeons to easily change leg length, offset, or anteversion independently without affecting other variables, using a case with receptacles configured to facilitate selection based on these variables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If modular neck components are used to accommodate variations in patient anatomy, then adaptability is improved, but device complexity increases due to multiple components and selection variables
Solution Approach 1:
The modular neck component system is divided into discrete segments or components, each with specific geometric parameters (leg length, offset, anteversion). This segmentation allows surgeons to select and combine individual components to match patient anatomy, improving adaptability while managing complexity through standardized modular units.
Solution Approach 2:
The modular neck component system is designed to accommodate multiple patient anatomies and surgical requirements through a universal set of components. A single modular system can address variations in leg length, offset, and anteversion, making it universally applicable to diverse patient populations rather than requiring custom components for each case.
2Measurement precision
If multiple variables (leg length, offset, anteversion) are evaluated to select optimal implant, then measurement precision is improved, but ease of operation deteriorates due to complex calculations and lookup tables
Solution Approach 1:
The geometric parameters (leg length, offset, anteversion) of each modular neck component are predetermined and manufactured to precise specifications. This preliminary action of pre-calculating and pre-manufacturing components with exact geometric properties eliminates the need for complex intraoperative calculations, allowing surgeons to simply measure patient anatomy and select the matching pre-prepared component.
Solution Approach 2:
The modular neck component acts as an intermediary that translates patient anatomical measurements into the final implant configuration. Rather than requiring surgeons to perform complex mathematical conversions between different measurement systems, the modular components serve as physical intermediaries that directly correspond to measured anatomical parameters, simplifying the selection process.
Data Source
AI summary
A case for modular neck components for hip implants. The case may include indicators 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 case 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. A method described herein may include preoperative planning in which a template including a grid coordinate system is used, which advantageously provides an intuitive system for the surgeon both preoperatively and during surgery.