Biopolymer Wound Dressing Structure to Reduce Tissue Ingrowth
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Solution Overview
Problem
Existing negative-pressure therapy systems face challenges in preventing tissue ingrowth and managing high levels of matrix metalloproteases (MMPs) that hinder wound healing, while also promoting granulation tissue formation.
Innovation Solution
Dressings comprising a manifold and a biopolymer layer are designed to reduce or prevent tissue ingrowth, with the biopolymer layer having a longer length and/or larger surface area than the manifold, and the manifold having a compressibility index value greater than the dry state compressibility index value of the biopolymer layer, and less than the hydrated state compressibility index value of the biopolymer layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a manifold is used in negative-pressure therapy, then wound healing is promoted through fluid removal and tissue deformation, but tissue ingrowth occurs at the outer edges reducing therapy effectiveness
Solution Approach 1:
A biopolymer layer is introduced as an intermediary between the manifold and the wound bed. This layer serves as a barrier that prevents granulation tissue from ingrowing into the manifold edges while allowing the manifold to continue its therapeutic function of removing fluid and deforming tissue to promote healing.
Solution Approach 2:
The biopolymer layer functions as a flexible thin film that conforms to the wound bed and manifold interface. This film structure effectively blocks tissue ingrowth at the edges while maintaining the necessary flexibility to accommodate wound dynamics and negative pressure application.
2Object-affected harmful factors
If the biopolymer layer completely covers the manifold, then tissue ingrowth is prevented, but the manifold cannot be removed without removing the biopolymer layer
Solution Approach 1:
The biopolymer layer is applied with varying coverage: it extends beyond the manifold edges to prevent tissue ingrowth, but the portion covering the manifold body allows for selective removal. The excess biopolymer at the edges remains to block tissue ingrowth while the central portion can be removed with the manifold, demonstrating local quality differentiation in functionality.
3Adaptability or versatility
If the manifold is highly compressible, then it conforms to irregular wound shapes, but it allows tissue entrapment at the edges
Solution Approach 1:
The biopolymer layer acts as an intermediary barrier between the compressible manifold and the wound bed. It allows the manifold to maintain its compressibility for conforming to irregular wound shapes while preventing tissue from being trapped or ingrown into the manifold edges.
Data Source
AI summary
Dressings are provided herein having a manifold and a biopolymer layer. The configuration and/or compressibility of the manifold and the biopolymer layer can allow for reduced tissue ingrowth and promote wound healing. Methods of making and using the dressings are also provided herein.