Resilient Sheath Remover for Sterile Needle Sheath Release
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Solution Overview
Problem
Administering injections with pre-filled syringes poses risks and challenges due to the need to remove a protective needle sheath before use, which can be cumbersome and may compromise sterility.
Innovation Solution
A sheath remover device comprising a resilient ring with legs and ledges that engage with the sheath, allowing for easy removal by pulling in the distal direction, accommodating component tolerances and maintaining sterility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective needle sheath is used to protect the injection needle, then safety and protection are improved, but the complexity of operation increases due to the need to remove the sheath before use
Solution Approach 1:
The sheath remover is pre-positioned on the protective needle sheath in a stored position, performing the removal action in advance before the injection is administered. This eliminates the need for manual sheath removal by the user, as the remover automatically performs this preliminary action during the injection process
Solution Approach 2:
The sheath remover acts as an intermediary device between the protective needle sheath and the injection needle. It engages with the sheath and facilitates its removal, serving as a mediator that transfers the removal function from the user to the device itself
2Device complexity
If manual removal of the protective needle sheath is required, then device simplicity is maintained, but sterility may be compromised during the removal process
Solution Approach 1:
The sheath remover enables the system to serve itself by automatically removing the protective needle sheath without requiring manual intervention. The device performs the removal function autonomously, eliminating the risk of sterility compromise that would occur during manual removal operations
Solution Approach 2:
The sheath remover is positioned and activated before the injection administration, performing the sheath removal in a controlled preliminary action that maintains sterility. The remover engages with the sheath in a predetermined manner that preserves the sterile barrier until the moment of injection
3Adaptability or versatility
If the sheath remover is designed to accommodate varying component tolerances, then adaptability is improved, but the device complexity increases
Solution Approach 1:
The sheath remover employs resilient legs that can dynamically adjust their position and engagement force to accommodate varying component tolerances. The resilient nature of the legs allows them to adapt to different sheath dimensions and positions without requiring complex adjustment mechanisms
Solution Approach 2:
The device utilizes the resilient material property to change the physical state and engagement characteristics of the legs based on the encountered resistance and dimensional variations. This parameter change capability allows the same structure to adapt to different tolerances without adding complexity
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
Facilitates efficient and sterile removal of protective needle sheaths from drug cartridges, ensuring smooth operation and maintaining sterility during assembly and storage.
Implementation Method 1
a resilient ring (2) and two or more resilient legs (5) attached directly or indirectly to the ring (2) and extending in a proximal direction
Data Source
AI summary
The present disclosure relates to a sheath remover for removing a protective needle sheath from a drug cartridge. The sheath remover includes a resilient ring and one or more resilient legs attached to the ring and extending in a proximal direction. Each leg includes an inwardly directed ledge arranged at a proximal end of the leg. The ring consists of a resilient material allowing inward deflection of a proximal end of the ring. The present disclosure further relates to a method for assembling and a method for using the sheath remover.