Collapsible Wound Dressing Structure for Horizontal Wound Closure

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Solution Overview

Problem

Existing negative pressure wound treatment systems lack adequate mechanisms for applying closing force to wounds and supporting sutures, and existing dressings are difficult to apply, especially around curved or non-flat body surfaces, with wound exudate often soaking into the dressing, causing aesthetic and social issues.

Innovation Solution

A negative pressure wound treatment apparatus with a stabilizing structure that collapses more horizontally than vertically to apply a horizontal force to the skin surrounding the wound, incorporating a backing layer, absorbent layer, and tissue anchors to secure the dressing, which can relieve stress on sutures and manage wound exudate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If negative pressure is applied to the wound dressing, then wound exudate is removed and wound healing is promoted, but the dressing becomes aesthetically unpleasing and potentially embarrassing in social situations

Engineering Contradiction:

Improvewound healing effectivenessVSAvoidaesthetic appearance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The stabilizing structure is designed to collapse preferentially in the horizontal plane rather than the vertical plane. This dimensional orientation allows the dressing to maintain a flat, aesthetically pleasing appearance from the front view while still collapsing effectively to apply closing force to the wound edges when negative pressure is applied

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Loss of substance

If existing negative pressure wound treatment systems are used, then wound fluids are removed, but adequate mechanisms for applying closing force to the wound and supporting sutures are lacking

Engineering Contradiction:

Improvewound fluid removalVSAvoidclosing force application

Core Design Contradiction:

Loss of substanceVSForce

Solution Approach 1:

The patent combines multiple functions into a single integrated stabilizing structure: it provides mechanical support for sutures, applies closing force to wound edges, and maintains dressing stability. This merged structure eliminates the need for separate components while achieving both fluid removal and force application functions

Inventive Principle:

Principle #5Merging (Combining)

3Force

If the stabilizing structure collapses significantly more within a horizontal plane than within a vertical plane, then a horizontal force is applied to the skin surrounding the wound, but the structural design becomes more complex

Engineering Contradiction:

Improvehorizontal closing forceVSAvoidstabilizing structure design

Core Design Contradiction:

ForceVSDevice complexity

Solution Approach 1:

The stabilizing structure employs asymmetric geometry where the horizontal dimensions are designed to be significantly larger than the vertical thickness. This asymmetric design allows the structure to collapse preferentially in the horizontal plane under negative pressure, generating effective closing force while maintaining structural integrity in the vertical direction

Inventive Principle:

Principle #4Asymmetry

4Ease of operation

If the backing layer and stabilizing structure are configured as a single unit, then placement over the wound is simplified, but the manufacturing process may become more difficult

Engineering Contradiction:

Improvedressing applicationVSAvoidsingle unit configuration

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The backing layer and stabilizing structure are manufactured as a single integrated unit, eliminating the need for separate application steps. This merging simplifies the clinical application process while the modular design principles used in manufacturing allow for efficient production despite the integrated nature of the components

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 apparatus effectively applies closing force to wounds, supports sutures, and manages exudate, improving wound healing and reducing aesthetic issues by collapsing horizontally to distribute pressure evenly, while maintaining adherence to non-flat body surfaces.

Implementation Method 1

negative pressure wound therapy has become a common therapy for the treatment of certain types of wounds

Methodology Applied

Scientific EffectNegative pressure: Pressure Gradient

Implementation Method 2

the stabilizing structure is configured to collapse significantly more within a horizontal plane than within a vertical plane to apply a horizontal force to the skin surrounding the wound

Methodology Applied

Scientific EffectCollapse: Compression

Implementation Method 3

the wound dressing further comprises an absorbent layer between the stabilizing structure and the backing layer

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentEP4008299B1Collapsible dressing for negative pressure wound treatment

Publication Date: 2025.12.17 SMITH & NEPHEW PLC

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AI summary

Embodiments disclosed herein are directed to negative pressure treatment systems and wound dressing systems, apparatuses, and methods that may be used for the treatment of wounds. In particular, some embodiments are directed to improved wound dressings comprising an obscuring layer that may hide fluid contained therein and a stabilizing structure that may aid in wound closure.