Modular Intramedullary Fixation for Variable Bone Geometry
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Solution Overview
Problem
Existing intramedullary fixation devices are not adaptable to the wide variety of bone sizes and shapes, requiring invasive techniques for proper fitting and preparation.
Innovation Solution
A modular intramedullary fixation device composed of multiple Z-shaped elements with adjustable sections and connectors, allowing for customization to fit different bone dimensions through screw fixation and adjustable lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional intramedullary fixation devices are used, then the device structure is simple, but the device cannot adapt to varying bone sizes and shapes between patients
Solution Approach 1:
The intramedullary fixation device is divided into multiple modular sections that can be independently selected and combined. Each section has standardized connection interfaces allowing them to be assembled into different configurations to match various bone geometries and fracture patterns, thereby achieving adaptability without requiring a completely different device for each case.
Solution Approach 2:
The device employs universal connection interfaces and standardized components that can be used across different bone types and fracture locations. The same basic modular elements can be adapted for use in various bones (femur, tibia, humerus, etc.) through different assembly configurations, making the system multi-functional and broadly applicable.
2Adaptability or versatility
If conventional fixation devices are used to match specific bone dimensions, then invasive techniques are required, but this increases patient trauma and surgical complexity
Solution Approach 1:
The device incorporates adjustable and reconfigurable elements that can be modified intraoperatively to match the specific bone dimensions. The modular design allows for dynamic adjustment of device geometry and configuration during surgery, enabling customization without requiring excessively invasive preparation procedures.
3Adaptability or versatility
If modular elements are used to achieve adaptability, then the device can accommodate various bone sizes, but the number of components and assembly complexity increases
Solution Approach 1:
The modular elements are designed with nested or telescoping capabilities, allowing smaller components to be contained within or alongside larger ones. This nesting approach reduces the overall number of separate components needed while maintaining the ability to achieve various sizes and configurations through selective assembly of the nested elements.
Data Source
AI summary
The modular intramedullary fixation device is a multi-piece bone fixation device for insertion into the medullary cavity of a bone. In one embodiment, the modular intramedullary fixation device is formed from a plurality of substantially Z-shaped modular elements, which are assembled together to a desired length and width. In additional embodiments, the modular intramedullary fixation device includes a proximal portion, a distal portion, and a connector for connecting the two portions to each other. The connector may be provided in a wide variety of configurations, including an adjustable connector for adjusting the length of the modular intramedullary fixation device. Each of the proximal and distal portions may further have an adjustable length.