Protective Sheath Cannula Safety Syringe
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Solution Overview
Problem
Current safety syringes with protective sheaths lack convenience and safety features, such as optimized retracted positions and easy manipulation, leading to potential needlestick injuries and cumbersome handling.
Innovation Solution
A protective sheath for a cannula with female means that provide distinct retracted positions before, during, and after use, along with an ejection position, ensuring the cannula is fully or partially exposed, and featuring anti-return and locking mechanisms for secure transitions and alignment of retracted positions for optimized length and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective sheath is added to the syringe to prevent needlestick injuries, then safety is improved, but the syringe becomes more cumbersome and difficult to manipulate
Solution Approach 1:
The protective sheath is designed with dynamic characteristics, allowing it to be flexible and adaptable during manipulation. The sheath can be easily positioned and locked into place, providing safety without excessive rigidity or complexity that would hinder ease of use.
2Reliability
If multiple retracted positions are provided for the cannula, then safety and functionality are improved, but the device complexity increases
Solution Approach 1:
The protective sheath is segmented with multiple distinct retracted positions (first retracted position, second retracted position, and ejection position) that allow the cannula to be positioned at different stages of use. This segmentation provides enhanced safety and functionality while maintaining a relatively simple overall structure through the use of basic locking mechanisms.
Data Source
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AI summary
The present invention relates to a protective sheath (100) for a cannula (210) arranged on a hub (200) which can be fitted onto a syringe (300), said sheath comprising female means intended to cooperate with male means (201) of the hub (200) for guiding thereof, and characterized in that said female means comprise a retracted position before use RBU, a retracted position during use RU, and a retracted position after use RAU, wherein the whole length of the cannula (210) is inside said sheath (100), said female means further comprise an ejection position E, wherein whole or part of the cannula (210) protrudes out of said sheath (100), and further characterized in that at least two of the RBU, RU, and RAU positions are substantially transversally aligned.