Intraosseous Coupler Design for Secure Driver Attachment
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Solution Overview
Problem
Current intraosseous access technologies face challenges in securely coupling intraosseous devices with drivers, leading to issues with rotation resistance and secure attachment, which can compromise the stability and effectiveness of bone marrow access procedures.
Innovation Solution
The development of couplers with drive hubs featuring female threads, recesses, and interference fits, along with adhesive and resilient clips, ensures secure coupling and resistance to rotation between the intraosseous devices and drivers, enhancing the stability and ease of use during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional coupling methods are used to attach intraosseous devices to drivers, then the device can be assembled, but rotation resistance and secure attachment are insufficient
Solution Approach 1:
The coupling mechanism is divided into separate functional elements: a drive hub with female threads for the intraosseous device, a driveshaft with male threads for the driver, and additional securing features like resilient clips or interference fit recesses. This segmentation allows each component to perform its specific function while collectively providing secure attachment and rotation resistance.
Solution Approach 2:
The coupling mechanism employs asymmetric features such as non-circular recesses, shaped tabs, or directional interference fits that prevent rotation by creating geometric incompatibility between the intraosseous device and driver. The asymmetric design ensures that the components can be assembled in only one orientation and resist rotational forces effectively.
2Ease of operation
If simple coupling mechanisms are used, then device assembly is easy, but rotation resistance is insufficient
Solution Approach 1:
The coupling mechanism incorporates self-securing features such as resilient clips that automatically engage with the driveshaft, interference fit recesses that create automatic mechanical interlocking, or threaded connections that self-tighten during assembly. These self-service features provide rotation resistance without requiring additional manual securing steps, maintaining ease of operation.
Solution Approach 2:
The coupling mechanism utilizes curved or rounded features such as circular recesses, domed surfaces, or arc-shaped engagement paths that guide the intraosseous device into proper alignment during assembly. The curved geometry facilitates easy insertion while the final engagement position provides adequate rotation resistance through precise geometric fitting.
3Reliability
If multiple securing features are added to prevent rotation, then rotation resistance improves, but device complexity increases
Solution Approach 1:
Multiple securing features are merged into a single integrated coupling mechanism where the drive hub, driveshaft, and securing elements form a unified assembly. For example, the resilient clips may be integrally formed with the drive hub, or the interference fit recesses are molded directly into the coupling structure. This merging provides rotation resistance through multiple mechanisms while maintaining relatively simple overall device complexity.
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.