Reuse Prevention Safety Catheter With Deformable Locking Guide
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Solution Overview
Problem
Existing reuse prevention safety catheters require complex configurations and multiple injection molded parts, making them costly and difficult to manufacture, while users can still attempt to reuse them due to operational difficulties.
Innovation Solution
A reuse prevention safety catheter design featuring a locking guide unit with a through-hole that deforms upon needle withdrawal, preventing reinsertion, and a slide casing that covers the needle, using a minimal number of injection molded parts and a simple manufacturing process, ensuring the catheter is structurally impossible to reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex configuration with multiple injection molded parts is used for reuse prevention, then the reliability of preventing reuse is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The locking guide unit is divided into a body portion and a deformable portion that can be separately molded and then assembled. This segmentation allows each part to be optimized independently while maintaining overall simplicity, resolving the contradiction between reliable reuse prevention and manufacturing complexity
Solution Approach 2:
The locking guide unit is disposed within the slide casing, and the internal needle passes through the through-hole of the locking guide unit. This nested arrangement integrates multiple functions into a compact structure, achieving reliable reuse prevention without increasing overall device complexity
2Reliability
If a complex configuration with multiple injection molded parts is used for reuse prevention, then the reliability of preventing reuse is improved, but the manufacturing cost increases
Solution Approach 1:
By dividing the locking guide unit into a body portion and a deformable portion, the patent enables modular manufacturing where simpler components can be produced more cost-effectively through standard injection molding processes, then assembled into the final reuse prevention mechanism
Solution Approach 2:
The catheter system is designed as a disposable medical device where the locking guide unit prevents reuse through a single-use deformation mechanism. This aligns with the disposable nature of the product, ensuring reliability for one use while keeping manufacturing costs low through simple, non-reusable design
3Reliability
If the through-hole is deformed to prevent reinsertion, then the reliability of preventing reuse is improved, but the ease of operation during initial use may be affected
Solution Approach 1:
The locking guide unit is pre-configured with a through-hole that is easily penetrable by the internal needle during initial use. The deformation that prevents reuse only occurs after the needle has been inserted and withdrawn, ensuring that the preliminary action of needle insertion remains easy while reliability is achieved in the reuse prevention phase
Data Source
AI summary
A reuse prevention safety catheter is proposed. The reuse prevention safety catheter includes: a catheter hub having an external needle disposed therein; a cannula plug having an internal needle inserted and penetrated into the catheter hub disposed therein to introduce the external needle into a blood vessel and be separated from the catheter hub; and a locking guide unit having a through-hole configured to allow the internal needle to pass through, wherein the through-hole is deformed when the penetrated internal needle is withdrawn, such that re-penetration of the internal needle is blocked.