Fibrous Negative-Pressure Dressing Core for Simpler Fluid Management

Solution Overview

Problem

The high cost and complexity of negative-pressure therapy systems and components pose challenges for manufacturers, healthcare providers, and patients, limiting their application and effectiveness in wound treatment.

Innovation Solution

A multi-function core for tissue treatment comprising a contact layer made of collagen, a wicking layer, an ion exchange layer, an absorbing layer, and a blocking layer, all formed from fibers, which work together to manage fluid and promote tissue growth while preventing liquid flow, thereby simplifying the dressing structure and reducing manufacturing complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple separate functional layers are used in negative-pressure therapy dressings, then the therapeutic function is improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improvetherapeutic functionVSAvoiddressing structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functional layers (contact layer, wicking layer, absorbing layer, blocking layer) into a single integrated core structure formed from fibrous material. This merging reduces the number of separate components while maintaining all necessary therapeutic functions including fluid wicking, absorption, and pressure distribution.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fibrous core structure performs multiple functions simultaneously: it provides structural support, wicks fluid away from the wound, absorbs exudate, distributes negative pressure uniformly, and maintains wound bed contact. This multi-functionality eliminates the need for separate specialized components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple separate functional layers are used in negative-pressure therapy dressings, then the therapeutic function is improved, but the manufacturing cost increases

Engineering Contradiction:

Improvetherapeutic functionVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines multiple functional layers (contact layer, wicking layer, absorbing layer, blocking layer) into a single integrated core structure formed from fibrous material. This merging reduces the number of separate components while maintaining all necessary therapeutic functions including fluid wicking, absorption, and pressure distribution.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fibrous core structure performs multiple functions simultaneously: it provides structural support, wicks fluid away from the wound, absorbs exudate, distributes negative pressure uniformly, and maintains wound bed contact. This multi-functionality eliminates the need for separate specialized components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If complex multi-layer structures are used, then fluid management capability is improved, but the healing time increases due to longer assembly and application processes

Engineering Contradiction:

Improvefluid managementVSAvoidhealing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines multiple functional layers (contact layer, wicking layer, absorbing layer, blocking layer) into a single integrated core structure formed from fibrous material. This merging reduces the number of separate components while maintaining all necessary therapeutic functions including fluid wicking, absorption, and pressure distribution.

Inventive Principle:

Principle #5Merging (Combining)

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 multi-function core enhances tissue growth, reduces healing times, and simplifies dressing assembly and manufacturing, making negative-pressure therapy more accessible and cost-effective.

Implementation Method 1

a contact layer comprising collagen and configured to be positioned adjacent to the tissue site

Methodology Applied

Scientific EffectCollagen:

Implementation Method 2

a wicking layer adjacent to the contact layer

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 3

an ion exchange layer adjacent to the wicking layer

Methodology Applied

Scientific EffectIon exchange: Ion Exchange

Implementation Method 4

an absorbing layer adjacent to the ion exchange layer

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 5

a blocking layer arranged to prevent liquid flow through the blocking layer by creating a pressure barrier for liquid movement

Methodology Applied

Scientific EffectPressure barrier: Pressure Gradient

Data Source

PatentEP3434237B1Multi-function dressing structure for negative-pressure therapy

Publication Date: 2021.11.17 3M INNOVATIVE PROPERTIES CO

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AI summary

Systems, methods, and apparatuses for forming a multi-function core for a dressing are described. The multi-function core includes a contact layer configured to be positioned adjacent to a tissue site, a wicking layer adjacent to the contact layer, an ion exchange layer adjacent to the wicking layer, an absorbing layer adjacent to the ion exchange layer, a blocking layer adjacent to the absorbing layer, and an odor-absorbing layer adjacent to the blocking layer. The contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer are coextensive and formed from a plurality of fibers disposed in a fibrous web. Methods of manufacturing the multi-function core are also described.