Negative Pressure Wound Dressing With Perforated Adhesive Layer
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Solution Overview
Problem
Conventional wound dressings face issues with adhesive skin contact layers that either lose breathability due to perforation closure or fail to adhere properly, leading to fluid accumulation and air leaks, while absorbent layers lack sufficient capacity and flexibility, causing discomfort and hygiene issues.
Innovation Solution
A wound dressing with an adhesive skin contact layer having perforations between 1.25 mm and 5.00 mm in diameter and a weight of 40 gsm to 250 gsm, combined with an absorbent structure, maintains breathability and adhesion, preventing tissue ingrowth and ensuring airtight sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the perforation diameter in the adhesive skin contact layer is increased to improve breathability, then water vapour and gas can pass through more easily, but the adhesion of the skin contact layer to the dermal surface is reduced, causing the dressing to detach
Solution Approach 1:
The patent applies parameter changes by specifying a particular range for perforation diameter (1.25-5.00 mm) and skin contact layer weight (40-250 gsm) to optimize the balance between breathability and adhesion. This quantitative parameter adjustment resolves the contradiction by finding the optimal values that satisfy both requirements simultaneously.
2Reliability
If the perforation diameter is decreased to improve adhesion, then the skin contact layer adheres better to the dermal surface, but breathability is reduced, causing fluid accumulation at the wound site
Solution Approach 1:
The patent resolves this contradiction by establishing specific parameter ranges: perforation diameter of 1.25-5.00 mm and skin contact layer weight of 40-250 gsm. These parameter changes ensure sufficient adhesion while maintaining adequate breathability to prevent fluid accumulation.
3Quantity of substance
If the absorbent material capacity is increased to improve fluid handling, then more exudate can be absorbed, but the dressing becomes bulkier and less portable
Solution Approach 1:
The patent applies parameter changes by optimizing the absorbent structure's properties and distribution within the dressing architecture. This allows the dressing to achieve high fluid handling capacity while maintaining a compact, portable form factor suitable for patient use.
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 provides optimal wound healing conditions by maintaining adhesion and breathability, preventing fluid pooling, and ensuring consistent negative pressure application without air leaks.
Implementation Method 1
an adhesive skin contact layer configured to detachably adhere the dressing to a dermal surface
Implementation Method 2
the adhesive skin contact layer is a perforated mesh comprising perforations each having a diameter of between 1.25 mm and 5.00 mm
Implementation Method 3
an absorbent structure arranged between the backing layer and the adhesive skin contact layer
Data Source
AI summary
A negative pressure wound dressing, the dressing comprising a backing layer, an adhesive skin contact layer and an absorbent structure arranged between the backing layer and the adhesive skin contact layer, wherein the adhesive skin contact layer is configured to detachably adhere the dressing to a dermal surface, wherein the backing layer comprises a coupling member configured to connect the dressing to a negative pressure source, wherein the absorbent structure comprises a superabsorbent layer, and wherein the superabsorbent layer may comprise an upper layer and a lower layer, the upper layer and the lower layer may enclose a first material comprising non-woven fibres, an absorbent material and a hot melt binder.