Electroless Copper Coating for Catheter Microbial Control

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Solution Overview

Problem

Invasive medical devices are prone to microbial colonization, leading to increased infection risk for patients.

Innovation Solution

Incorporating a substantially non-eluting copper-coated surface on the medical device surfaces, particularly through electroless deposition, to prevent microbial colonization and reduce infection incidence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If antimicrobial agents are applied to medical devices, then microbial colonization is prevented, but the device complexity increases

Engineering Contradiction:

Improveinfection preventionVSAvoidcoating application complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The copper coating is applied to the medical device surfaces during manufacturing before the device is put into service. This preliminary application of the antimicrobial coating ensures that the protective function is already in place when the device is inserted into the patient, eliminating the need for subsequent application steps and reducing operational complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The copper coating acts as an intermediary layer between the medical device surface and microorganisms. This intermediate copper layer provides the antimicrobial function while allowing the underlying device to maintain its primary medical function, thus adding complexity only where needed for infection prevention.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If copper coating is applied via electroless deposition, then uniform coating is achieved, but manufacturing time increases

Engineering Contradiction:

Improvecoating uniformityVSAvoidmanufacturing cycle time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The electroless deposition process replaces mechanical or manual coating methods with a chemical deposition mechanism. The copper coating is deposited through a chemical reaction that occurs uniformly across the device surface without requiring mechanical application, thereby achieving consistent coating thickness and uniformity while streamlining the manufacturing process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If copper coating is used to prevent microbial colonization, then infection risk is reduced, but device cost increases

Engineering Contradiction:

Improveinfection preventionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The copper coating is applied in controlled parameters including thickness control (typically 0.5-5 micrometers) and composition control (copper content and alloying elements). By optimizing these parameters, the coating achieves effective antimicrobial protection at minimal thickness, reducing material costs and simplifying the manufacturing process while maintaining reliable infection prevention.

Inventive Principle:

Principle #35Parameter changes

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

The copper coating achieves a 4-log reduction in microbial presence, acting as a passive barrier by contact killing and maintaining the surface free of microbes, thereby reducing infection risk.

Implementation Method 1

The copper coating achieves a 4-log reduction in microbial presence, acting as a passive barrier by contact killing and maintaining the surface free of microbes

Methodology Applied

Scientific EffectContact killing:

Implementation Method 2

Incorporating a substantially non-eluting copper-coated surface on the medical device surfaces, particularly through electroless deposition

Methodology Applied

Scientific EffectElectroless deposition:

Data Source

PatentUS12447237B2Application of antimicrobial agents to medical devices

Publication Date: 2025.10.21 CR BARD INC

AI summary

Invasive medical devices including a substantially non-eluting antimicrobial treatment. One or more external and/or internal surfaces of the medical device include a substantially non-eluting copper-coated surface that assists in preventing microbial colonization of the coated surface. This in turn reduces the incidence of infection to the patient originating from the medical device. In one embodiment, a catheter assembly is disclosed and comprises an elongate catheter tube that defines at least one lumen, at least one extension leg including a luer connector, and a bifurcation hub including at least one fluid passageway that provides fluid communication between the extension leg and the lumen. A substantially non-eluting copper coating is disposed on a surface of at least one of the lumen, the extension leg, the luer connector, and the fluid passageway. The coating is applied via an electroless deposition process. A water-shed coating is disposed on the copper coating.