Dual Material Tissue Interface for Negative-Pressure Therapy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current negative-pressure therapy systems for wound treatment lack efficient methods for fluid management and tissue interface design, which can lead to suboptimal wound healing and increased healing times due to inadequate fluid restriction and tissue interaction.
Innovation Solution
A dressing is manufactured by applying a cross-linkable polymer to a polymer film, curing it to form a gel layer, and then perforating the film to create fluid restrictions with specific slot dimensions, which are integrated into a therapy system for negative-pressure treatment and instillation therapy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-material dressings are used for negative-pressure therapy, then the device structure is simple, but fluid management is inadequate and tissue interaction is suboptimal
Solution Approach 1:
The patent applies composite materials by combining a polymer film layer with a gel layer containing cross-linkable polymer. This dual-material structure enables differentiated functions: the polymer film provides structural integrity and fluid barrier properties, while the gel layer enables controlled fluid flow and improved tissue interaction through its viscoelastic properties. The composite structure resolves the contradiction by achieving superior fluid management and tissue interface performance without excessive complexity.
Solution Approach 2:
The dressing is segmented into distinct functional layers: a polymer film layer and a gel layer with cross-linkable polymer. This segmentation allows each layer to be optimized for its specific function - the film layer for structural support and fluid restriction, and the gel layer for tissue interaction and controlled fluid flow. The segmentation enables independent optimization of each component to achieve overall system reliability.
2Reliability
If larger fluid flow channels are created in the dressing, then fluid management is improved, but tissue growth is inhibited due to excessive fluid flow
Solution Approach 1:
The gel layer is positioned specifically at the tissue interface where controlled fluid flow is needed, while the polymer film layer provides broader fluid restriction. This local quality differentiation ensures that fluid flow is regulated precisely where it contacts the tissue, preventing excessive flow that would inhibit tissue growth while maintaining overall fluid management effectiveness through the combined layered structure.
Solution Approach 2:
The cross-linkable polymer in the gel layer undergoes parameter changes through cross-linking reactions, transforming from a liquid or semi-liquid state to a gel state with specific viscoelastic properties. This parameter change enables the gel to provide controlled fluid flow characteristics that prevent tissue growth inhibition while maintaining effective fluid management at the tissue interface.
3Reliability
If a gel layer with cross-linkable polymer is applied to the polymer film, then tissue interaction is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The cross-linkable polymer is applied to the polymer film in a preliminary state before final cross-linking occurs. This preliminary action allows the gel layer to be positioned and integrated with the film layer while maintaining ease of handling and assembly. The cross-linking process is then activated to finalize the gel structure, ensuring optimal tissue interface performance without requiring complex integrated manufacturing processes.
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 enhances fluid management and tissue interaction, promoting better wound healing by reducing healing times and improving tissue growth through controlled fluid flow and pressure application.
Implementation Method 1
applying a cross-linkable polymer to a polymer film, curing the cross-linkable polymer to a gel layer on the polymer film
Implementation Method 2
curing the cross-linkable polymer to a gel layer on the polymer film to form a coated polymer film
Implementation Method 3
A laser can be used to perforate the coated polymer film to create a plurality of slots
Implementation Method 4
reducing pressure in proximity to a tissue site can augment and accelerate growth of new tissue at the tissue site
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A dressing for treating tissue with negative pressure is provided herein comprising a composite of dressing layers, including a release film, a perforated coated polymer film, a manifold, and an adhesive cover. Additionally, a method of manufacturing the dressing may comprise applying a cross-linkable polymer to a polymer film, curing the cross-linkable polymer to a gel. layer to form a coated polymer film, and perforating the coated polymer film, to form fluid restrictions, such as slits and/or slots, though the coated polymer film.