Catheter Attachment with Molecularly Dispersed PCPP Antimicrobial Protection

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Solution Overview

Problem

Existing catheter attachments lose antimicrobial effectiveness quickly and mechanical integrity due to impregnation with antimicrobial substances, leading to increased nosocomial infections and contamination issues.

Innovation Solution

A catheter attachment made of non-elastomeric plastic with molecularly dispersed polychlorinated phenoxyphenol (PCPP), particularly 5-chloro-2-(2,4-dichlorophenoxy)phenol, ensuring long-lasting antimicrobial activity and mechanical stability by integrating the substance homogeneously within the plastic matrix.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If catheter attachment is impregnated with antimicrobial substance, then antimicrobial activity is achieved, but mechanical integrity is lost and effectiveness diminishes quickly

Engineering Contradiction:

Improveantimicrobial effectivenessVSAvoidmechanical integrity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent changes the physical state and distribution parameters of the antimicrobial substance from surface-level impregnation to molecular dispersion within the polymer matrix. This fundamental parameter change allows the substance to remain uniformly distributed at the molecular level, preventing both mechanical degradation and premature release, thereby maintaining both strength and reliability simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system where polychlorinated phenoxyphenol (PCPP) is integrated at the molecular level within a non-elastomeric plastic matrix. This composite structure combines the mechanical properties of the plastic with the antimicrobial properties of PCPP, achieving both strength and reliability through material composition rather than surface treatment

Inventive Principle:

Principle #40Composite materials

2Reliability

If catheter attachment is impregnated with antimicrobial substance, then initial antimicrobial protection is provided, but duration of action is short due to burst effect

Engineering Contradiction:

Improveantimicrobial effectivenessVSAvoidduration of antimicrobial activity

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent transforms the release kinetics parameter from rapid burst release to sustained controlled release by changing from surface impregnation to molecular dispersion. The molecularly dispersed PCPP releases antimicrobial agents gradually over time as the material interacts with biological environments, extending the duration of action from days to weeks or months while maintaining reliable protection

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent ensures continuous antimicrobial protection by distributing the active substance throughout the entire material volume at the molecular level. This continuous distribution provides ongoing protection as the catheter attachment remains in use, preventing the discontinuous burst effect that characterizes impregnated materials and ensuring uninterrupted antimicrobial action

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS12383699B2Catheter attachment made of plastic that contains molecularly dispersed polychlorinated phenoxyphenol (PCPP)

Publication Date: 2025.08.12 SCHIERHOLZ JORG

AI summary

The invention relates to a catheter attachment made of a non-elastomeric plastic that contains homogeneously distributed, molecularly dispersed polychlorinated phenoxyphenol (PCPP), in particular 5-chloro-2-(2,4-dichloro-phenoxy)-phenol (Irgasan©).