Wound Dressing Conductive Backing Layer Barrier Integrity

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Solution Overview

Problem

Existing wound dressings fail to maintain liquid tightness and barrier integrity when used with electrical stimulation devices, as conductive wires or electrodes compromise the backing layer's seal, allowing external contamination and exudate leakage.

Innovation Solution

A wound dressing design featuring a backing layer with integrated conductive regions, extending beyond the wound pad's circumference, allows direct attachment of TENS electrodes without intermediate components, ensuring a sealed barrier against bacteria and exudates, using conductive plastic film and optional conductive liquid-permeable sheets for efficient electrical stimulation and conventional dressing functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conductive wires or electrodes are integrated into the backing layer, then electrical stimulation function is enabled, but liquid tightness and barrier integrity are compromised

Engineering Contradiction:

Improveelectrical stimulation functionVSAvoidbarrier integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The backing layer is segmented into multiple functional regions: a first region with conductive material for electrode attachment, a second region without conductive material for maintaining barrier integrity, and a third region with adhesive for skin attachment. This segmentation allows the backing layer to simultaneously provide electrical stimulation capability and maintain liquid tightness, as the non-conductive second region ensures barrier integrity while the conductive first region enables electrical function.

Inventive Principle:

Principle #1Segmentation

2Area of stationary object

If the backing layer extends beyond the wound pad, then skin attachment area is increased, but device complexity increases

Engineering Contradiction:

Improveskin attachment areaVSAvoidbacking layer structure

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The backing layer employs local quality by having different regions with different properties: the peripheral region extending beyond the wound pad contains adhesive for skin attachment, while the central region contacts the wound pad. This allows the backing layer to provide both extended skin attachment area and proper wound coverage without requiring complex multi-component structures.

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 the wound dressing to function as both an electrical stimulation device and a conventional dressing, providing effective barrier protection and allowing for easy attachment of electrodes, ensuring continuous wound care without frequent dressing changes, while maintaining liquid permeability and conductivity.

Implementation Method 1

the backing layer has at least one conductive region and comprises plastic film

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

a wound pad of absorbent material

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 3

an adhesive layer for attaching the dressing to skin

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentEP2593180B1Wound dressing with adhesive along the periphery and with a conductive region

Publication Date: 2017.10.18 MOLNLYCKE HEALTH CARE AB

AI summary

The present invention relates to a wound dressing (1) including a wound pad (2) of absorbent material having a first side and a second side opposite thereto, a backing layer (3) covering the wound pad on the first side thereof an adhesive layer (4) for attaching the dressing to skin. According to the invention the backing layer (3) has at least one conductive region (7) and consists of plastic film.