Infusion Set With Retractable Needle And Protective Housing
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Solution Overview
Problem
Existing infusion devices lack protection for the cannula tip, making them vulnerable to accidental removal and user injury, and often require additional devices that complicate the injection process.
Innovation Solution
A device with a protective element that encases the cannula or needle tip, a holder to secure the cannula in place, and a mechanism to automatically retract the needle into the protective element after insertion, ensuring the cannula is not inadvertently removed and simplifying the injection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cannula is left unprotected after insertion, then the injection process is simple, but the cannula can be inadvertently removed and users can be injured by the exposed tip
Solution Approach 1:
The protective element is designed to surround and encase the cannula tip, creating a nested structure where the protective element contains the sharp cannula tip. This nesting approach protects the user from injury while maintaining a simple overall device structure without requiring multiple separate components.
Solution Approach 2:
The protective element is pre-positioned around the cannula before insertion, and the system is designed to automatically retract the cannula into the protective element after insertion. This preliminary positioning and automatic retraction eliminate the need for manual protective actions by the user, simplifying the injection process while ensuring safety.
2Ease of operation
If a needle is used to insert the cannula, then the cannula can be inserted into tissue, but the needle remains exposed and can cause injury after insertion
Solution Approach 1:
The needle is inserted through the protective element, creating a nested arrangement where the protective element contains both the needle and cannula during insertion. After insertion, the needle is automatically retracted into the protective element, eliminating exposure while maintaining the insertion function.
Solution Approach 2:
The needle is extracted from the protective element after serving its insertion function. The needle passes through the protective element during insertion and is then automatically retracted or removed, separating the sharp needle from the final positioned cannula while the protective element remains in place to prevent injury.
3Reliability
If additional devices are moved with the cannula during injection, then the cannula can be secured, but positioning becomes difficult and the process is complicated
Solution Approach 1:
The protective element is merged with the cannula assembly as an integrated unit. The holder and protective element work together as a combined system that secures the cannula without requiring separate positioning actions. This merging maintains cannula security while simplifying the injection process by eliminating the need to independently position multiple separate devices.
Data Source
AI summary
A device for inserting a cannula into tissue, including a cannula, a protective element which can accommodate said cannula, an operating element for moving the cannula out of the protective element, and a holder fixedly connected to the cannula. The invention encompasses a system for connecting a liquid supply to the cannula.