Negative Pressure Wound Dressing With Breathable 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 adhesion and breathability, preventing tissue ingrowth and ensuring effective fluid management.
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 effectively, but the adhesion of the skin contact layer to the dermal surface is reduced, causing the dressing to detach
Solution Approach 1:
The patent changes the parameter of perforation diameter from the conventional maximum of 1.2 mm to a range of 1.25-5.00 mm, and simultaneously changes the weight parameter of the skin contact layer to 40-250 gsm. These parameter changes enable larger perforations that maintain both breathability and adhesion, resolving the contradiction between the two requirements.
2Reliability
If the perforation diameter is kept small to maintain adhesion, then the skin contact layer adheres well to the dermal surface, but breathability is reduced causing fluid accumulation at the wound site
Solution Approach 1:
The patent applies parameter changes by establishing a new range for perforation diameter (1.25-5.00 mm) and skin contact layer weight (40-250 gsm). This resolves the contradiction by finding optimal parameter values that simultaneously ensure both strong adhesion and adequate breathability, preventing fluid accumulation while maintaining secure attachment.
3Reliability
If silicone adhesive is used in the skin contact layer to improve adhesion, then the layer adheres well to the dermal surface, but the adhesive blocks the perforations reducing breathability
Solution Approach 1:
The patent resolves this contradiction by changing the parameters of perforation diameter (to 1.25-5.00 mm) and skin contact layer weight (40-250 gsm). The larger perforation diameter and optimized layer weight prevent adhesive blocking while maintaining adhesion, allowing both strong attachment and effective breathability to coexist.
4Quantity of substance
If the absorbent material capacity is increased to improve fluid management, then exudate can be absorbed more effectively, but the dressing becomes less flexible causing discomfort
Solution Approach 1:
The patent applies parameter changes to the absorbent structure, optimizing its capacity while maintaining flexibility. By carefully controlling the absorbent material properties and structure, the dressing achieves effective exudate absorption without compromising the flexibility needed for patient comfort and proper fit.
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 reliable adhesion and breathability, preventing fluid accumulation and air leaks, while maintaining optimal wound healing conditions and enhancing user comfort by absorbing exudate effectively.
Implementation Method 1
an adhesive skin contact layer configured to detachably adhere the dressing to a dermal surface
Implementation Method 2
allowing water vapour and gas to pass through the layer
Implementation Method 3
allowing water vapour and gas to pass through the layer
Implementation Method 4
an absorbent structure arranged between the backing layer and the adhesive skin contact layer
Implementation Method 5
absorbent material, and by evaporation through the dressing
Implementation Method 6
Negative pressure may facilitate wound healing through a number of mechanisms, including removal of excess exudate
Implementation Method 7
by evaporation through the dressing
Data Source
AI summary
A negative pressure wound dressing, the dressing comprising a backing layer, an adhesive border 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 wound contact layer, a transmission layer and a superabsorbent layer, and wherein at least two of the wound contact layer, the transmission layer and the superabsorbent layer may be laminated together.