Integrated Septum and Needle Tip Shield for Catheter Safety
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Solution Overview
Problem
Existing needle shield designs for catheter assemblies have sharp, exposed metal edges and fail to provide clear visual confirmation of needle tip protection, leading to potential exposure to blood and accidental needle sticks during catheter insertion and withdrawal.
Innovation Solution
An integrated septum and needle tip shield apparatus that secures inside the catheter hub, featuring a septum that engages with the hub's inner surface and a tip shield that moves between open and closed positions to protect the needle tip, providing a blood-containing seal and visual confirmation of protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a needle shield is used to protect the needle tip, then protection from needle sticks is improved, but sharp exposed metal edges and lack of visual confirmation increase exposure risk
Solution Approach 1:
The patent combines the septum and needle tip shield into a single integrated apparatus. The septum serves dual functions: sealing the catheter hub and shielding the needle tip. This merging eliminates the need for separate components, ensuring that the needle tip is always protected when inserted through the catheter hub, while the septum's seal prevents blood exposure.
Solution Approach 2:
The tip shield is designed with visual indicators such as color coding or transparent portions that allow clinicians to quickly confirm whether the needle tip is protected. The septum may have color-coded regions indicating its functional states, enabling rapid visual verification of protection status without requiring complex inspection procedures.
2Ease of operation
If the needle shield is made small to fit the catheter hub, then ease of insertion is improved, but visual confirmation of needle tip protection becomes difficult
Solution Approach 1:
The tip shield incorporates visual indicators such as color-coded regions or transparent portions that enable clinicians to quickly confirm needle tip protection. The septum may have color-coded areas indicating its functional states, providing clear visual feedback despite the compact size of the apparatus.
Solution Approach 2:
The integrated apparatus utilizes the radial dimension by extending the septum outward from the catheter hub, creating a protective barrier that is both compact and visually distinguishable. The septum's radial extension provides a clear visual indicator of protection while maintaining a small overall footprint for easy insertion.
3Ease of operation
If the needle is withdrawn without protection, then ease of withdrawal is improved, but blood contamination and accidental sticks increase
Solution Approach 1:
The septum and tip shield are integrated into a single apparatus that remains attached to the catheter hub during needle withdrawal. The septum's seal continues to protect the catheter hub opening while the tip shield covers the needle tip, ensuring blood containment throughout the withdrawal process without complicating the operation.
Solution Approach 2:
The septum acts as an intermediary barrier between the needle and the catheter hub interior. During withdrawal, the septum maintains a seal that prevents blood from contaminating the catheter hub while allowing the needle to be removed. The tip shield serves as a secondary intermediary protecting the needle tip from causing accidental sticks.
Data Source
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AI summary
An integrated septum (32) and needle tip shield (34) for use in a catheter assembly (10) includes a septum configured to removably engage with an inner surface of a catheter hub (16) and a tip shield secured inside the septum. The tip shield is configured to move between an open position in which a tip of a needle (12) is distal of the tip shield and a closed position in which the tip of the needle is protected inside the tip shield.