Needleless Connector Antimicrobial Recess Design
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Solution Overview
Problem
Infusion devices, such as catheters and connectors, are prone to infections due to microbial contamination through the threaded regions, which conventional sterilization methods cannot effectively address, leading to elevated mortality rates and healthcare costs.
Innovation Solution
The integration of an antimicrobial composition on the male luer's distal tip and intermediate recessed portions, which forms a cavity with the female luer, ensuring a high concentration of antimicrobial agent to kill microbes upon insertion, thereby preventing infection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sterilization methods are used on connectors, then the manufacturing process is simple and cost-effective, but microbial contamination through threaded regions cannot be effectively prevented
Solution Approach 1:
The patent applies antimicrobial composition specifically to the distal tip and intermediate portions of the male luer, creating localized antimicrobial protection at the most critical contamination points without requiring entire connector sterilization. This resolves the contradiction by providing targeted infection prevention (improving reliability) while maintaining simple connector structures (avoiding increased complexity).
Solution Approach 2:
The antimicrobial composition is pre-applied to the male luer surfaces before connection, establishing protective action in advance. When the male luer is inserted into the female luer, the pre-positioned antimicrobial agent immediately contacts and kills microorganisms, preventing infection before it can establish. This preliminary action resolves the contradiction by ensuring reliability through advance protection without complicating the connector design.
2Reliability
If tapered sealing regions are used to seal fluid, then fluid containment is effective, but organisms can still migrate through threaded regions and penetrate into the sealing region
Solution Approach 1:
The antimicrobial composition is applied to the distal tip and intermediate portions of the male luer to preemptively kill microorganisms before they can penetrate the sealing region. This preliminary anti-action counteracts the harmful effect of microbial migration through the threaded regions, maintaining both sealing effectiveness and preventing organism penetration simultaneously.
Solution Approach 2:
The patent applies antimicrobial protection specifically to the distal tip and intermediate portions where microbial penetration is most likely to occur, while maintaining the tapered sealing region's original sealing function. This localized approach resolves the contradiction by protecting against microbial penetration without compromising sealing effectiveness.
3Ease of operation
If connectors are separated and reconnected multiple times, then device operation is flexible, but organisms on connector walls can be pushed into the fluid path during insertion
Solution Approach 1:
The antimicrobial composition is pre-applied to the male luer surfaces, so that every time the male luer is inserted into the female luer, the pre-positioned antimicrobial agent immediately contacts and kills any organisms on the connector walls. This ensures reliable infection prevention (improving reliability) while maintaining connection flexibility (preserving ease of operation).
Solution Approach 2:
The antimicrobial composition provides continuous protective action across multiple connection cycles. Each insertion event reactivates the antimicrobial protection, ensuring that the useful action of preventing infection continues indefinitely throughout the device's operational life, regardless of how many times connectors are separated and reconnected.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces microbial contamination and infection rates by maintaining a lethal antimicrobial concentration within the fluid path, enhancing patient safety and reducing healthcare costs.
Implementation Method 1
the distal tip having a recess surface proximal to the distal end, wherein the recess surface is radially inward of a line of taper extending along, and distal of, the male tapered surface at a first taper angle relative to a central longitudinal axis of the male connector; and a water-soluble antimicrobial composition positioned on the recess surface
Data Source
AI summary
A needleless connector and methods for preventing microbial ingress in medical device connections are disclosed. Various examples provide a needleless connector including a male luer having a recessed distal tip surface containing a water-soluble antimicrobial composition. Further examples include a trap for retaining antimicrobial composition. As the needleless connector is inserted into a female connector, a tapered surface distal edge acts to push microorganisms, while the distal tip surface is configured to leave microorganisms undisturbed. After insertion of the needleless connector, microorganisms present on the female luer surface are biased to reside in the recess region. The recess, trap, and antimicrobial composition are configured to facilitate a long-lasting supply of antimicrobial solution within the fluid-filled recess, at the same time confining the antimicrobial solution inside the recess. This produces a high concentration of antimicrobial solution for an extended time, killing microbes, stopping microbial ingress, and preventing infections in patients.