Permeable Membrane Wound Dressing for Gas Exchange

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional dressings often cause delayed healing by adhering to forming cicatrization tissue, leading to tissue tear during removal, and require frequent changes, especially when absorbing bleedings, with costly negative pressure systems being complex and energy-intensive.

Innovation Solution

A dressing with a main compress covered by a permeable membrane having an inlet and outlet for controlled liquid flow and gas exchange, preventing pressure buildup and maceration, and optionally featuring an integrated reservoir for self-filling and a flexible closure mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional compress dressing is used to protect the wound, then the wound is shielded from the external environment, but the compress adheres to the cicatrization tissue causing tissue tear during removal and delayed healing

Engineering Contradiction:

Improvewound protectionVSAvoidtissue adhesion and tear

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent uses a flexible permeable membrane instead of a conventional compress to cover the wound. This thin film allows gas exchange while preventing adhesion to the cicatrization tissue, eliminating tissue tear during removal while maintaining wound protection.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The permeable membrane is designed with porous structure that allows oxygen and other gases to pass through while maintaining a physical barrier over the wound. This prevents the membrane from adhering to the tissue while still providing protection and enabling gas exchange for healing.

Inventive Principle:

Principle #31Porous materials

2Duration of action of moving object

If a hydrocolloid mass dressing is used to maintain moist environment and promote cicatrization, then healing is promoted, but the dressing becomes costly

Engineering Contradiction:

Improvehealing promotionVSAvoiddressing cost

Core Design Contradiction:

Duration of action of moving objectVSEase of manufacture

Solution Approach 1:

The patent changes the key parameter from using expensive hydrocolloid mass to using a simple permeable membrane with controlled gas permeability. This maintains the moist environment needed for healing while dramatically reducing the cost of the dressing material.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If a negative pressure system is used to maintain moist and antiseptic environment and promote absorption, then healing is enhanced, but the system becomes complex and energy-intensive

Engineering Contradiction:

Improvehealing enhancementVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and eliminates the complex negative pressure generation system (pumps, power sources, control mechanisms) while retaining the essential function of maintaining a protected, moist environment through the permeable membrane alone. Healing is enhanced through gas exchange rather than negative pressure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical negative pressure system with a passive permeable membrane system that relies on natural gas diffusion and capillary action, eliminating the need for mechanical pumps and energy input while still achieving enhanced healing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If a dressing absorbs bleedings effectively, then the wound is protected, but the dressing must be replaced frequently

Engineering Contradiction:

Improvewound protectionVSAvoiddressing duration

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The permeable membrane allows continuous gas exchange and liquid management without becoming saturated. This enables the dressing to maintain its protective function for longer periods without frequent replacement, as the membrane can handle bleedings while remaining breathable.

Inventive Principle:

Principle #31Porous materials

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 dressing allows controlled liquid supply and gas exchange, reducing tissue adhesion and enabling longer dressing duration, minimizing tissue tear and frequency of changes, while being cost-effective and easy to use.

Implementation Method 1

the membrane, on at least part of the surface opposite this compress, has a permeability allowing exchange of gases

Methodology Applied

Scientific EffectGas permeability: Permeation

Implementation Method 2

it has an inlet opening for a treatment liquid on the main compress

Methodology Applied

Scientific EffectFluid flow:

Data Source

PatentUS11458043B2Dressing for skin care in a moist environment

Publication Date: 2022.10.04 DROCHE EMILE

AI summary

Dressing for skin care, having a main compress covered by a membrane with an adhesive contour which extends beyond this compress and which is designed to be applied to the skin, this dressing having an inlet port for a treatment liquid on the main compress, and the membrane having, on at least part of the surface opposite this compress, a permeability that permits exchange of gases.