Layered Wound Dressing for Moisture Balance and Maceration Prevention

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Solution Overview

Problem

Existing wound dressings face challenges in providing optimal fluid absorption that prevents maceration while maintaining a moist environment for wound healing, and ensuring durability and ease of manufacture.

Innovation Solution

A dressing design incorporating an evaporative film layer with high moisture vapor transfer rate, a superabsorbent layer, and a wicking layer, along with structural support from a carrier film layer, to manage fluid absorption and evaporation, and optionally including a fenestrated film layer to control fluid flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a dressing absorbs fluid from a wound, then maceration is prevented, but the wound may become too dry for optimal healing

Engineering Contradiction:

Improvemaceration preventionVSAvoidfluid retention for wound healing

Core Design Contradiction:

Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

The dressing is segmented into distinct functional layers: a wicking layer for fluid uptake, a superabsorbent layer for fluid storage, and an evaporative film layer for controlled evaporation. This segmentation allows each layer to perform its specific function optimally, preventing both maceration and excessive drying by distributing fluid management tasks across multiple specialized components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The evaporative film layer dynamically changes the evaporation rate parameter based on fluid presence. When fluid is abundant, evaporation increases to prevent maceration; when fluid is depleted, evaporation decreases to maintain moisture for healing. This parameter adjustment resolves the contradiction between fluid removal and fluid retention.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If an evaporative film layer with high moisture vapor transfer rate is used, then fluid evaporation is enhanced, but the film may lack structural durability

Engineering Contradiction:

Improveevaporation rateVSAvoidfilm durability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The dressing merges two film layers with complementary properties: an evaporative film layer optimized for high moisture vapor transfer rate and a carrier film layer optimized for structural durability. These layers are combined into a single composite structure where the evaporative film performs its high-productivity function while the carrier film provides the necessary mechanical strength and reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The evaporative film and carrier film form a composite material structure where each component contributes its superior properties. The evaporative film provides high moisture vapor transfer capability while the carrier film provides structural integrity, creating a composite that achieves both high evaporation rate and durability that neither layer could achieve alone.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If multiple functional layers are added to manage fluid absorption and evaporation, then fluid management is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvefluid management capabilityVSAvoidnumber of layers

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

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 effectively manages fluid absorption and evaporation, preventing maceration and maintaining a moist wound environment, while being durable and easy to manufacture.

Implementation Method 1

The wicking layer is configured to wick fluid from a wound

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

the superabsorbent layer is configured to absorb the fluid from the wicking layer

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 3

the evaporative film layer and the carrier film layer allow evaporation of the fluid from the superabsorbent layer through the plurality of holes

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS12599504B2Wound dressing with fluid management

Publication Date: 2026.04.14 SOLVENTUM INTELLECTUAL PROPERTIES CO

AI summary

A dressing includes an evaporative film layer having a wound-facing side and a non-wound¬ facing side. The evaporative film layer has a high moisture vapor transfer rate. The dressing includes a carrier film layer coupled to the non-wound-facing side of the evaporative film layer. A plurality of holes extends through the carrier film layer. The dressing includes a superab sorbent layer coupled to the wound-facing side of the evaporative film layer and a wicking layer coupled to the superab sorbent layer. The superab sorbent layer is positioned between the wicking layer and the evaporative film layer. The wicking layer is configured to wick fluid from a wound, the superab sorbent layer is configured to absorb fluid from the wicking layer, and the evaporative film layer and the carrier film layer allow evaporation of fluid from the superabsorbent layer through the holes. The carrier film layer provides structural support to the evaporative film layer.