Multi-Layer Negative-Pressure Dressing for Anisotropic Wound Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wound treatment technologies, such as negative-pressure therapy and instillation therapy, lack improvements in system components and processes that enhance tissue growth and wound healing efficiency.
Innovation Solution
A multi-layer dressing system comprising a contact layer and manifold layers with perforations and holes, designed to conform to tissue sites and apply negative pressure anisotropically, combined with a fluid conductor and controller for controlled instillation of therapeutic solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional wound dressing is used, then the structure is simple, but it cannot provide effective negative pressure therapy and tissue growth promotion
Solution Approach 1:
The dressing is divided into multiple functional layers: a contact layer with perforations for negative pressure application, a manifold layer with holes for fluid distribution, and an adhesive drape for securing. Each layer performs a specific function, enabling effective negative pressure therapy while maintaining structural organization.
Solution Approach 2:
The dressing combines different materials with specific properties: porous foam for the contact layer to allow fluid penetration, elastic polymer for the manifold layer to provide flexibility and conformability, and adhesive material for the drape to secure the dressing. This composite structure enables simultaneous achievement of negative pressure therapy, fluid management, and comfort.
2Strength
If the manifold layer is made thick to provide sufficient cushioning, then the dressing can withstand negative pressure, but the dressing profile increases and flexibility decreases
Solution Approach 1:
The manifold layer uses foam with optimized density and thickness parameters to achieve the required cushioning strength while maintaining flexibility. The porous structure provides mechanical support against negative pressure, while the elastic properties allow the dressing to conform to body contours and difficult geometries.
3Reliability
If the dressing is designed to conform to difficult tissue geometry, then it can apply negative pressure effectively, but the dressing profile must be reduced to increase flexibility
Solution Approach 1:
The manifold layer is constructed as a thin, flexible foam structure that can conform to difficult tissue geometries while maintaining sufficient cushioning. The porous foam provides mechanical support in a thin profile, enabling the dressing to adapt to body contours without requiring excessive thickness.
4Productivity
If the contact layer is made highly permeable to allow fluid flow, then instillation therapy is effective, but negative pressure application is reduced
Solution Approach 1:
The contact layer uses porous foam with optimized porosity to allow controlled fluid flow for instillation therapy while maintaining sufficient negative pressure transmission. The pore structure is designed to permit fluid penetration for therapeutic instillation while still allowing the negative pressure to be effectively applied to the tissue.
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 system enhances tissue growth and wound healing by promoting anisotropic contraction, improving fluid management, and providing controlled application of negative pressure and therapeutic solutions, thereby reducing healing times and enhancing tissue development.
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 population of holes may be configured to promote anisotropic contraction of the dressing parallel to the width of the dressing
Implementation Method 3
The manifold layer may include a population of holes extending at least partially through the manifold, wherein the holes may be configured to promote anisotropic contraction of the dressing
Implementation Method 4
Negative-pressure therapy may provide a number of benefits, including migration of epithelial and subcutaneous tissues, improved blood flow, and micro-deformation of tissue at a wound site
Data Source
AI summary
A dressing for treating tissue may be a composite of dressing layers, including a contact layer, a manifold layer, and an adhesive drape. The manifold layer may include one or more layers of felted open-cell foam in some examples. The manifold layer may be relatively thin to reduce the dressing profile and increase flexibility, which can enable it to conform to difficult geometry and other tissue sites under negative pressure. The dressing may have a length and a width less than the length. The manifold layer may include a population of holes extending at least partially therethrough, wherein the holes may be configured to promote anisotropic contraction of the dressing parallel to its width. The population of holes may have a circular, ovoid, triangular, square, hexagonal, irregular, or morphous shape. The dressing may be a bolster that may anisotropically contract to provide a closing force to a linear wound.