Proximal-Femur Intraosseous Release Device with Triangular Fixation
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Solution Overview
Problem
Existing intraosseous release devices cannot fix the femur of a patient with femoral head necrosis and a bony crack or fracture at the proximal femur, leading to a risk of secondary injury.
Innovation Solution
A proximal-femur intraosseous release device featuring a primary fixing mechanism with a first and second shell, triangular blocks, and a spring system, which allows for the fixation of the femur by ejecting a triangular block to secure the fracture site, and a secondary fixing mechanism for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an existing intraosseous release device is used to deliver medicine into the femur, then the medicine delivery function is achieved, but the device cannot fix the femur, leading to risk of secondary injury
Solution Approach 1:
The patent combines the medicine delivery function and the femur fixation function into a single integrated device. The release mechanism delivers medicine through the needle into the femur, while the fixing mechanism (comprising fixing blocks, limiting blocks, and springs) simultaneously secures the femur to prevent secondary injury. This merging of functions resolves the contradiction by making the device both versatile and safe.
Solution Approach 2:
The device is designed to perform multiple functions: it can deliver medicine into the femur through the release mechanism, and it can also fix the femur in position through the fixing mechanism with movable fixing blocks. This multi-functionality allows the device to address both the medical treatment need and the safety/immobilization need in a single application.
2Reliability
If a fixing mechanism is added to the intraosseous release device to fix the femur, then the fixation function is achieved, but the device complexity increases
Solution Approach 1:
The fixing mechanism is segmented into modular components: fixing blocks that can move independently, limiting blocks that constrain the movement range, and springs that provide restoring force. Each component has a specific function, and they work together in a coordinated manner. This segmentation allows the complex fixation function to be achieved through simple, well-defined parts rather than a monolithic complex structure.
Solution Approach 2:
The fixing mechanism is designed to be self-regulating through the spring-loaded system. When the fixing blocks are pushed outward by the limiting blocks, the springs are compressed and automatically exert a restoring force to return the fixing blocks to their original position. This self-service mechanism eliminates the need for additional actuators or complex control systems, achieving reliable fixation with minimal structural complexity.
3Reliability
If the second triangular block is ejected to fix the fracture site, then the fixation effect is improved, but the risk of block loss increases
Solution Approach 1:
The second triangular block is nested within the first shell during storage and transport. When fixation is needed, the block is ejected from the shell through the limiting blocks. After serving its fixation purpose, the block can be returned to and stored within the shell. This nesting arrangement ensures the block is securely held when not in use, eliminating the risk of loss while maintaining the ability to deploy it when needed for fixation.
Solution Approach 2:
The fixing blocks are designed as disposable components that can be ejected to perform their fixation function and then recovered back into the device shell. The limiting blocks and springs facilitate this ejection and recovery process. This approach allows the fixation blocks to be used effectively while ensuring they are not lost after use, as they can be retrieved and stored within the device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively delivers medicine into the femur while providing fixation to prevent secondary injuries, with the secondary fixing mechanism ensuring long-term stability and preventing loosening under external forces.
Implementation Method 1
a first spring is connected between the second limiting block and the first stopper... the second triangular block is restored to the interior of the first shell under the action of an elastic force of the first spring
Implementation Method 2
an outer side wall of the second shell is provided with a thread groove to be screwed to the inner side wall of the first shell through threads
Data Source
AI summary
A proximal-femur intraosseous release device includes a release mechanism. A primary fixing mechanism is provided at one end of the release mechanism, the primary fixing mechanism includes a first shell, and a second shell, a first triangular block and a second triangular block are arranged inside the first shell; the second shell is screwed to the first shell through threads, a bottom of the second shell is rotatably connected with the first triangular block, the first triangular block is slidably connected with the first shell, a bottom surface of the first triangular block is an inclined surface, the second triangular block is located at a bottom of the first triangular block, a top surface of the second triangular block is an inclined surface, and a through hole matched with the second triangular block is formed in the first shell.