Infusion Adapter Retaining Ring for Leak-Proof Port Attachment

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Solution Overview

Problem

Existing infusion systems face issues with insecure connections between syringes and infusion bags, leading to accidental disconnections, leakage, and high force requirements to pierce fluid barriers, which compromise the integrity and safety of drug administration.

Innovation Solution

An infusion adapter with a retaining ring that securely connects to an infusion fluid container, featuring a tapered and rounded first side for easy insertion and a sharp edge on the opposite side to prevent disconnection, along with a syringe adapter port and optional indicators for visualization, ensuring a leak-proof and secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a needle is used to penetrate the septum of an infusion bag, then the syringe can be connected to the infusion bag, but the connection is insecure and may cause accidental disconnection

Engineering Contradiction:

Improveconnection securityVSAvoidconnection stability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent introduces a retention member as an intermediary component between the syringe assembly and the infusion bag. This retention member includes a retention arm that engages with the injection port and a retention ring that secures the connection, acting as a mediator that prevents direct disconnection while maintaining the functional connection between syringe and infusion bag.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The retention member is divided into multiple functional segments: a retention arm for engaging the injection port, a retention ring for securing the connection, and an indicator portion for visual feedback. This segmentation allows each component to perform its specific function independently, improving overall connection security while maintaining ease of operation.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If high force is applied to pierce the fluid barrier of the injection port, then the needle can penetrate the septum, but it increases the risk of accidental disconnection and leakage

Engineering Contradiction:

Improveinsertion forceVSAvoidconnection integrity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The retention member is designed to be attached to the syringe assembly before insertion into the infusion bag. The retention arm and retention ring are pre-positioned to engage with the injection port during insertion, providing immediate securing action as soon as the needle penetrates the septum, thereby preventing disconnection without requiring excessive insertion force.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The retention member provides a cushioning effect by distributing the mechanical stress during insertion. The retention arm and retention ring absorb and distribute the forces applied during needle penetration, preventing concentrated stress that could cause leakage or disconnection, thereby maintaining connection integrity without requiring high insertion force.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If a retention mechanism is added to prevent disconnection, then connection security is improved, but the device complexity increases

Engineering Contradiction:

Improveconnection securityVSAvoidadapter structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The retention member combines multiple retention functions into a single integrated component. The retention arm, retention ring, and indicator portion are merged into one piece that attaches to the syringe assembly and performs multiple functions: securing the connection, preventing disconnection, and providing visual feedback. This merging reduces the number of separate components needed while maintaining connection security.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The retention member is designed as a multi-functional component that simultaneously provides mechanical retention, visual indication of proper insertion, and leak prevention. This universality allows a single component to perform multiple functions that would otherwise require separate devices, thereby improving connection security without proportionally increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12514977B2Infusion adapter

Publication Date: 2026.01.06 BECTON DICKINSON & CO LTD

AI summary

An infusion adapter for connection with an infusion fluid container includes a connection portion configured to engage an injection port of an infusion fluid container, and a port configured to connect to an intravenous line, with the port in fluid communication with the connection portion. The connection portion includes a retaining ring extending radially outward from the connection portion, with the retaining ring configured to securely connect the infusion adapter to the infusion fluid container to substantially prevent disconnection of the infusion adapter from the infusion fluid container once the infusion adapter is connected to the infusion fluid container. The retaining ring includes an indicator configured to provide visualization of insertion of the connection portion into an injection port of an infusion fluid container.