Vial Adaptor Audible Barb Mechanism for Secure Connection
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Solution Overview
Problem
Users face challenges in confirming successful connection between a vial and a medical injection device, leading to potential leakage due to unclear fluid path establishment, and difficulty in detecting complete connection.
Innovation Solution
A vial adaptor with a spike, flange, and audible barbs that snap-fit onto the vial neck, providing tactile and auditory feedback upon complete insertion, ensuring fluid communication is established.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adaptor connects to the vial without audible feedback mechanism, then the device complexity is reduced, but the user cannot reliably detect complete connection and fluid path establishment
Solution Approach 1:
The patent incorporates audible barbs that produce an audible click or snap sound when the adaptor is properly connected to the vial. This acoustic feedback mechanism provides real-time confirmation to the user that the connection is complete and the fluid path is established, directly resolving the reliability issue without significantly increasing complexity
Solution Approach 2:
The audible barbs are designed to automatically produce the connection confirmation sound through the mechanical action of insertion itself, without requiring external power sources, sensors, or electronic components. The structure serves its own feedback function through the inherent mechanical properties of the barbs engaging with the vial
2Reliability
If the spike penetrates the vial cover during connection, then fluid communication is established, but the user may not detect complete penetration leading to potential leakage
Solution Approach 1:
The audible barbs provide acoustic feedback that occurs at the precise moment when the spike completes penetration of the vial cover. This sound signal directly correlates with the establishment of fluid communication, making the previously undetectable penetration completion event observable and verifiable by the user
Solution Approach 2:
While the patent primarily uses audible feedback, the principle of providing visual or sensory changes to indicate state transitions is applied here through acoustic means. The audible click serves as a sensory signal that marks the transition from incomplete to complete penetration, similar to how color changes indicate state changes in other systems
3Ease of operation
If the adaptor is designed with only retention barbs, then the structure is simpler, but the user lacks confidence that connection is secure without tactile feedback
Solution Approach 1:
The patent divides the barb structure into two distinct functional segments: retention barbs that provide mechanical holding force, and audible barbs that provide connection confirmation. This segmentation allows each type of barb to be optimized for its specific function while working together as an integrated system
Solution Approach 2:
The audible barbs serve multiple functions: they provide tactile feedback during insertion, produce audible confirmation of proper connection, and work in conjunction with the retention barbs to ensure secure attachment. This multi-functionality addresses the user confidence issue without requiring separate feedback mechanisms
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 audible barb mechanism ensures users are aware of a secure connection, reducing the risk of leakage and enhancing confidence in fluid path establishment between the vial and medical injection device.
Implementation Method 1
at least one audible barb extending proximally from the rim and being configured to be snap-fitted onto the vial
Data Source
AI summary
A vial adaptor for connecting an injection device to a vial is provided. The adaptor includes a proximal connection portion connectable to the injection device; a spike extending distally from the proximal connection portion; a flange extending distally from the proximal connection portion and radially outward of the spike, a rim extending at a distance distally away from the flange and connected to the flange through a skirt; and at least one retention barb extending proximally from the rim and configured to be engageable with the vial that is to be connected to the adaptor. The adaptor further includes at least one audible barb thinner and longer than the retention barb.