Two-Layer Electrode for Uniform Wound Electrostimulation

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Solution Overview

Problem

Existing wound treatment devices with electrodes fail to achieve uniform electrostimulation, particularly for large surface injuries, due to current peaks near contact points, leading to inadequate treatment of chronic wounds.

Innovation Solution

A wound dressing with a two-layer energy transfer system, where a low-resistance silver layer provides homogeneous current distribution to a higher-resistance layer, ensuring uniform electrostimulation, and incorporating a hydrophilic, conductive wound coating that absorbs exudate and promotes healing without requiring removal for stimulation treatment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single-layer electrode is used for wound treatment, then the device structure is simple, but current peaks occur near contact points resulting in non-uniform electrostimulation

Engineering Contradiction:

Improveelectrode structureVSAvoidcurrent distribution uniformity

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The electrode is divided into two adjacent layers: a first energy supplying layer with lower electric resistance and a second energy transferring layer with higher electric resistance. This segmentation allows the first layer to provide homogeneous current distribution while the second layer transfers the energy to the wound coating, resolving the contradiction between structural simplicity and current distribution uniformity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The electrode uses a composite structure of two layers with different electric resistance properties. The first layer (lower resistance) and second layer (higher resistance) work together to achieve both structural feasibility and uniform current distribution, applying the composite materials principle to resolve the technical contradiction.

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If the wound coating is removed for stimulation treatment, then uniform electrostimulation can be applied, but the risk of infection increases and treatment time is extended

Engineering Contradiction:

Improveelectrostimulation uniformityVSAvoidinfection risk

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The wound coating and electrode are merged into a single integrated device where the wound coating serves dual functions: protecting the wound and enabling uniform electrostimulation through the two-layer electrode structure. This eliminates the need to remove the coating for treatment, reducing infection risk and treatment time while maintaining stimulation uniformity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The wound coating is designed to perform multiple functions simultaneously: it protects the wound surface and serves as a substrate for the electrode that delivers uniform electrostimulation. This multi-functionality resolves the contradiction between maintaining wound protection and achieving uniform stimulation without removal.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Power

If a low-resistance material is used for the entire electrode, then current flow is good, but current peaks occur at contact points

Engineering Contradiction:

Improvecurrent flowVSAvoidcurrent distribution uniformity

Core Design Contradiction:

PowerVSManufacturing precision

Solution Approach 1:

Different regions of the electrode have different resistance properties: the first layer has lower resistance to ensure good current flow, while the second layer has higher resistance to distribute the current uniformly across the wound surface. This local quality variation resolves the contradiction between current flow efficiency and distribution uniformity.

Inventive Principle:

Principle #3Local quality

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 solution enables nearly uniform energy distribution for improved wound healing, reduces treatment time, minimizes infection risk, and accelerates healing by maintaining a nearly oxygen-free environment and releasing wound healing substances.

Implementation Method 1

the first layer has a lower electric resistance and the second layer a higher electric resistance. Due to such a configuration, it has shown that a homogeneous current distribution can be reached over the whole surface of the energy transfer agent

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

the wound coating is hydrophilic and electrically conductive, whereby the wound coating can be a gel, in particular a hydrogel

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS7689285B2Multi-layer combination of an electric stimulation electrode and a wound dressing

Publication Date: 2010.03.30 WOUNDEL HEALTH CARE

AI summary

In order to make available a wound dressing (100) with at least one energy transfer agent (11, 12) and a wound dressing (13), namely a combination of wound dressing and electrode for the stimulation treatment, with which an uniform electrostimulation of the wound can be achieved so that the wound healing process is considerably improved, it is proposed that the energy transfer agent has at least two layers and that the energy transfer agent (11, 12) has at least two adjacent layers (11, 12), a first layer (11)—energy supply—and a second energy—distribution of energy—(12), whereby the first layer (11) has a lower electric resistance and the second layer (12) a higher electric resistance.