Intraosseous Driver Coupling With Interference-Fit Retention
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Solution Overview
Problem
Current intraosseous access technologies face challenges in securely coupling intraosseous devices with drivers, leading to instability and potential misalignment during bone marrow access procedures, which can result in inefficiencies and complications.
Innovation Solution
The development of couplers with drive hubs featuring female threads and recesses that create interference fits or use adhesives and resilient clips to securely couple intraosseous devices with drivers, ensuring stable rotation and prevention of removal, thereby enhancing the coupling mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coupling mechanisms are used to connect intraosseous devices with drivers, then the device can be assembled, but the coupling is unstable and allows rotation and misalignment during procedures
Solution Approach 1:
The coupling mechanism is divided into separate functional components: a drive hub with female threads for the intraosseous device, a recess for receiving the driveshaft, and resilient clips that can deform to create interference fits. This segmentation allows each component to be optimized for its specific function while maintaining overall coupling stability.
Solution Approach 2:
The recess in the drive hub is designed with a circular cross-sectional shape that receives the driveshaft, creating a rotational interface. The circular geometry ensures uniform distribution of rotational forces and prevents misalignment during the bone marrow access procedure.
2Reliability
If the drive hub uses simple threading without additional retention features, then the coupling mechanism is simple, but the intraosseous device can rotate or become dislodged during use
Solution Approach 1:
The drive hub incorporates localized retention features including resilient clips positioned at specific locations around the recess. These clips have triangular cross-sectional shapes that deform upon insertion of the driveshaft to create interference fits, providing localized gripping force that prevents rotation and dislodgement.
Solution Approach 2:
The resilient clips change their physical state from a relaxed configuration to a deformed configuration during insertion, creating an interference fit with the driveshaft. This parameter change in the clips' shape and position provides automatic retention without requiring additional complex locking mechanisms.
3Ease of operation
If the drive hub is entirely disposed inside the driver housing, then the coupling is protected, but access and operation of the intraosseous device becomes difficult
Solution Approach 1:
The drive hub is partially nested within the driver housing, with the second end containing the recess for the driveshaft positioned inside the housing for protection, while the first end with the female threads for the intraosseous device extends outside the housing for easy access and operation. This partial nesting arrangement allows both protection and accessibility.
4Reliability
If the coupling mechanism uses multiple retention features like resilient clips and interference fits, then rotation and removal are prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The resilient clips are integrated directly into the drive hub as a single molded or machined component rather than separate parts. This merging of the clips with the hub structure simplifies manufacturing by reducing the number of assembly steps and parts, while still providing the retention function through the clips' deformation and interference fit creation.
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
This solution provides a stable and secure coupling mechanism that resists rotation and removal of intraosseous devices, improving the efficiency and safety of bone marrow access procedures by maintaining precise alignment and reducing complications.
Implementation Method 1
the plurality of tabs configured to deform if the driveshaft is inserted into the recess
Implementation Method 2
an interference fit between the drive hub and the driveshaft will resist rotation of the drive hub relative to the driveshaft
Implementation Method 3
the female threads in the second end of the drive hub are configured to tighten if a driver rotates the drive hub and an IO device coupled to the drive hub in a clockwise direction
Implementation Method 4
an adhesive disposed in the recess and configured to adhere to a driveshaft inserted into the recess
Data Source
AI summary
This disclosure includes various embodiments of couplers for coupling intraosseous (IO) devices and drivers, and various embodiments of drivers and kits.