Antiseptic Cap Syringe with Ribs for Secure Locking

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Solution Overview

Problem

Catheters, especially chronic venous catheters, face challenges such as occlusion due to thrombosis and infection risks, necessitating improved lock solutions and devices for safer catheter management during infusion and between uses.

Innovation Solution

An antiseptic cap and syringe combination featuring a syringe barrel with a proximal and distal chamber, where the distal chamber has ribs to prevent rotational movement with the antiseptic cap, ensuring secure engagement and reducing the risk of reflux and infection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a standard syringe without antiseptic cap is used for catheter locking, then the procedure is simpler and faster, but the risk of infection increases

Engineering Contradiction:

Improveinfection riskVSAvoidsyringe structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the syringe barrel, plunger, and antiseptic cap into a single integrated assembly. The cap is pre-attached to the syringe tip, merging two separate components (syringe and cap) into one unit that is ready for immediate use, thereby reducing infection risk without significantly increasing operational complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The antiseptic cap is pre-positioned on the syringe before the locking procedure begins. This preliminary preparation ensures that the cap is already in place to prevent infection, eliminating the need for separate cap application steps and reducing the risk of contamination during the procedure

Inventive Principle:

Principle #10Preliminary action

2Reliability

If a secure connection mechanism is used to prevent reflux, then the reliability of catheter locking improves, but the ease of operation decreases

Engineering Contradiction:

Improvereflux preventionVSAvoidcap attachment

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The syringe assembly is designed to be self-contained with the cap already attached to the syringe tip. The system serves itself by having the cap pre-positioned and ready, eliminating the need for separate manual attachment steps and reducing operational complexity while maintaining secure connection

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The cap is nested within or integrated with the syringe assembly, with the cap forming an integral part of the syringe tip structure. This nesting arrangement ensures secure connection while simplifying the overall operation, as the cap and syringe move together as a single unit

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentEP2773398B1Antiseptic cap equipped syringe

Publication Date: 2021.12.15 EXCELSIOR MEDICAL CORP

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AI summary

A syringe assembly including: (1) a syringe barrel defining a chamber; (2) a plunger mounted in the chamber and moveable with respect to the barrel; and (3) a cap holder assembly containing a cap and an absorbent material removably attached to the syringe.