Integrated NPWT Dressing Electronics for Fluid-Safe Positioning

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Solution Overview

Problem

Existing negative pressure wound therapy (NPWT) systems face challenges with remote negative pressure sources that are cumbersome, difficult to position, and prone to wound exudate absorption, making it hard to incorporate electronic components conveniently and comfortably.

Innovation Solution

A wound dressing apparatus with an integrated negative pressure source and electronic components, positioned between a wound contact layer and a cover layer, incorporating a flexible circuit board, sensor, switch, and LED indicators, with antibacterial membranes and hydrophobic materials to prevent fluid ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a remote negative pressure source is used, then the wound dressing can be simplified, but the system becomes cumbersome and difficult to position

Engineering Contradiction:

Improvewound dressing structureVSAvoidpositioning convenience

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The patent combines the negative pressure source with the wound dressing into an integrated unit. The pump is positioned between the wound contact layer and the cover layer, merging two previously separate components (dressing and pump) into a single device that is applied to the patient simultaneously, eliminating the need for separate positioning of remote pump and tubing

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If electronic components are incorporated into the dressing, then functionality is improved, but moisture from the wound makes it difficult to incorporate electronics

Engineering Contradiction:

Improveelectronic functionalityVSAvoidelectronic component protection

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent divides the wound dressing into distinct functional zones: a first area containing the absorbent layer for fluid management, and a second area containing the electronics unit with the negative pressure source. This spatial segmentation isolates the electronic components from the moisture-generating wound environment while maintaining overall dressing functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a fluid barrier or hydrophobic membrane as an intermediary between the absorbent layer and the electronics unit. This intermediary layer allows the dressing to maintain its moisture-managing function while protecting the electronic components from fluid ingress, enabling reliable operation of electronic components in a moist wound environment

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the negative pressure source is integrated into the dressing, then positioning is simplified, but the dressing structure becomes more complex

Engineering Contradiction:

Improvepositioning convenienceVSAvoiddressing structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent employs flexible materials and thin-film structures to house the negative pressure source within the dressing. The electronics unit is designed with a flexible casing that can be positioned between the wound contact layer and cover layer without significantly increasing the overall bulk or rigidity of the dressing, maintaining ease of application and positioning

Inventive Principle:

Principle #30Flexible shells and thin films

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

Enables convenient and comfortable application of NPWT with improved fluid management and electronic functionality, enhancing wound healing by maintaining conformability and reducing disturbance.

Implementation Method 1

Negative pressure wound therapy (NPWT) systems commonly involve placing a cover that is impermeable or semi-permeable to fluids over the wound, using various means to seal the cover to the tissue of the patient surrounding the wound, and connecting a source of negative pressure (such as a vacuum pump) to the cover in a manner so that negative pressure is created and maintained under the cover

Methodology Applied

Scientific EffectNegative pressure: Pressure Gradient

Implementation Method 2

an absorbent layer in the first area configured to absorb fluid from the wound

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 3

a cradle in the second area allowing fluid communication between the absorbent layer and the electronics unit

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 4

The negative pressure source inlet protection mechanism can comprise a hydrophobic material configured to prevent fluid from entering the negative pressure source

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Data Source

PatentEP3519000B1Negative pressure wound treatment apparatuses and methods with integrated electronics

Publication Date: 2025.12.10 SMITH & NEPHEW PLC

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AI summary

Disclosed embodiments relate to apparatuses and methods for wound treatment. In some embodiments, a wound dressing apparatus can comprise a wound contact layer, a first area and a second area over the wound contact layer, and a cover layer configured to cover the wound contact layer, the first area, and the second area. The first area can comprise a spacer layer and an absorbent layer over the spacer layer. The second area can comprise an electronics cassette or cradle comprising a negative pressure source and/or electronic components.