Composite Dressing for Negative-Pressure Wound Therapy
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Solution Overview
Problem
Current negative-pressure therapy systems for wound treatment lack improvements in therapy systems, components, and processes, which can benefit healthcare providers and patients by enhancing wound healing outcomes.
Innovation Solution
A composite dressing for tissue treatment that includes a perforated polymer film, a manifold made of open-cell foam, and an adhesive drape, designed to maintain at least 80% of applied negative pressure through a distance of at least 6 centimeters, facilitating effective wound treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional negative-pressure therapy system is used, then wound treatment can be provided, but the system lacks improvements in therapy systems, components, and processes that would benefit healthcare providers and patients
Solution Approach 1:
The dressing combines multiple functional layers (perforated polymer film, open-cell foam manifold, adhesive drape) into a single integrated composite structure that maintains negative pressure while providing wound treatment benefits, eliminating the need for separate complex system components
Solution Approach 2:
The composite dressing serves multiple functions simultaneously: the polymer film provides barrier protection, the foam manifold distributes negative pressure uniformly, and the adhesive drape secures the dressing, all within a single universal component that improves wound healing outcomes
2Area of stationary object
If negative pressure is applied to a large wound area, then wound healing is promoted, but maintaining uniform negative pressure across the entire area becomes difficult
Solution Approach 1:
The dressing divides the large treatment area into multiple functional zones using the foam manifold structure, which segments and distributes negative pressure through numerous interconnected cells, ensuring uniform pressure transmission across the entire large wound surface
Solution Approach 2:
The open-cell foam manifold provides locally optimized pressure distribution characteristics throughout the dressing, with each foam cell acting as a local pressure equalization chamber that maintains consistent negative pressure across different regions of the large treatment area
3Shape
If the dressing needs to conform to wound beds and tissue sites, then flexibility is required, but thicker dressings reduce flexibility and increase profile
Solution Approach 1:
The dressing uses a thin flexible perforated polymer film as the primary structural layer that can easily conform to irregular wound beds and tissue sites, while the integrated foam manifold provides the necessary pressure distribution function without requiring additional thickness
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 dressing effectively maintains negative pressure over a larger area, promoting wound healing by enhancing tissue growth, improving blood flow, and reducing healing times, while also being easy to apply and customize for different tissue sites.
Implementation Method 1
reducing pressure in proximity to a tissue site can augment and accelerate growth of new tissue at the tissue site
Implementation Method 2
The manifold may comprise or consist essentially of open-cell foam in some examples. The manifold can be configured to maintain at least 80% of an applied negative pressure through the length
Implementation Method 3
The polymer film may also be co-extruded with a bonding layer in-situ, which may be formed from a hot melt adhesive, for example
Data Source
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AI summary
A dressing may include a first layer comprising a polymer film having a plurality of perforations. A second layer may comprise a manifold. A cover comprising a polymer film may be disposed adjacent to the second layer. The first layer, the second layer, and the third layer may be stacked so that the second layer is disposed between each of the first layer and the third layer. The second layer may have a length of at least 12 centimeters and not greater than about 32 centimeters. The second layer may have a thickness of between 7 millimeters and 9 millimeters. In some embodiments, the second layer may have a perimeter that is exposed between the first layer and the cover, which can allow the dressing to be customized for size and shape. The manifold may be configured to maintain at least 80% of an applied negative pressure through the length.