Wound Dressing Assembly With Removable Carrier

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Solution Overview

Problem

Existing wound dressings lack sufficient absorbent capacity to manage wound exudates, often resulting in blood-stained dressings and exposure of wounds during removal, as they are designed with adhesive properties that do not allow for the separation of the wound cover from the carrier layer.

Innovation Solution

A wound dressing assembly featuring a wound cover with a pressure-sensitive adhesive incorporating colloidal absorbents and a removable carrier, where the carrier can be detached from the wound cover after application, leaving the wound cover adhered to the skin, thus providing absorbent capacity and protecting the wound.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the wound cover and carrier are securely attached to one another, then the dressing provides stable protection during application, but the wound becomes exposed and unprotected when the dressing is removed

Engineering Contradiction:

Improvestable protection during applicationVSAvoidwound exposure during removal

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The dressing is divided into separate functional components: a wound cover layer that remains on the wound and a carrier layer that is removed. This segmentation allows the wound cover to provide continuous protection while the carrier is detached for disposal or replacement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The carrier layer is extracted as a removable component from the overall dressing system. This allows the carrier to be taken off while leaving the wound cover in place, preventing wound exposure during the removal process.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the adhesive is strong enough to secure the dressing, then the dressing adheres firmly to the skin, but the adhesive lacks sufficient absorbent capacity to manage wound exudates

Engineering Contradiction:

Improvefirm adhesion to skinVSAvoidabsorbent capacity for exudates

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The adhesive and absorbent functions are merged into a single integrated layer. The adhesive layer contains absorbent materials (such as hydrocolloids, alginates, or superabsorbent polymers) that can both bond to the skin and absorb wound exudates, eliminating the need for separate adhesive and absorbent components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The adhesive layer is constructed as a composite material combining adhesive polymers with absorbent particles or hydrocolloidal substances. This composite structure provides both the sticking power needed for secure attachment and the absorbent capacity to manage wound exudates effectively.

Inventive Principle:

Principle #40Composite materials

3Adaptability or versatility

If the dressing is made very flexible to conform to the wound area, then the dressing adapts well to various wound shapes, but the dressing becomes difficult to handle without wrinkling or adhering to itself

Engineering Contradiction:

Improveconformability to wound areaVSAvoidhandleability without wrinkling

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The dressing is segmented into distinct layers with different functional properties. The carrier layer provides structural rigidity and ease of handling, while the wound cover layer provides flexibility and conformability. This segmentation allows each layer to optimize its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the dressing have different mechanical properties tailored to their specific functions. The carrier layer has higher rigidity for easy handling and application, while the wound cover layer has higher flexibility for conforming to the wound surface. This local differentiation of material properties resolves the contradiction between handleability and adaptability.

Inventive Principle:

Principle #3Local quality

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 solution effectively manages wound exudates and protects the wound by allowing the wound cover to remain adhered to the skin while the carrier is removed, preventing exposure and maintaining a protective barrier.

Implementation Method 1

a wound cover pressure sensitive adhesive comprising a colloidal absorbent

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS10940050B2Wound dressing assembly

Publication Date: 2021.03.09 KENVUE BRANDS LLC

AI summary

A wound dressing assembly includes a wound cover and a carrier. The wound cover has a length and width substantially greater than a height (or thickness), a first major surface, and a second major surface, opposite the first. The first major surface has disposed thereon a wound cover pressure sensitive adhesive comprising a colloidal absorbent, and it is arranged and configured to adhere to mammalian skin during use. The carrier has a length and width substantially greater than a height (or thickness), a first major surface, and a second major surface, opposite the first. The first major surface of the carrier is disposed in facing relation and is removably attached to the second major surface of the wound cover, and it has disposed thereon at least one pressure sensitive adhesive. After application of the wound cover to skin for use, the carrier is removable from the wound cover to leave the wound cover adhered to the skin.