Textured Polymeric Tissue Interface for Reduced-Pressure Wound Therapy
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Solution Overview
Problem
Current tissue interfaces for reduced-pressure wound therapy can cause pain and discomfort due to tissue ingrowth and may leave remnants in the wound upon removal, necessitating improvements for both healthcare providers and patients.
Innovation Solution
A method of manufacturing a tissue interface involving a fabric with a plurality of polymeric fibers, where different sets of fibers form layers with varying densities to allow flexibility and inter-surface interaction, and applying a hydrophilic material to enhance fluid transport and tissue compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a tissue interface is used in reduced-pressure wound therapy, then granulation tissue growth is promoted and healing is accelerated, but tissue ingrowth into the interface causes pain and discomfort during removal
Solution Approach 1:
The fabric is segmented into multiple layers with different fiber densities - a first layer with lower density and a second layer with higher density - allowing different regions to serve different functions: promoting granulation while preventing excessive tissue ingrowth
Solution Approach 2:
Different layers of the fabric have different local qualities in terms of fiber density and permeability. The first layer has lower density to promote granulation, while the second layer has higher density to prevent excessive tissue ingrowth, creating localized functional zones within the single fabric structure
2Ease of operation
If a tissue interface is removed from the wound, then therapy can be adjusted or stopped, but remnants of the interface may be left in the wound
Solution Approach 1:
The problematic feature (high fiber density) is extracted and isolated to specific layers (second layer) where it serves to prevent tissue ingrowth, while the first layer maintains lower density for granulation promotion, allowing the interface to be removed more completely without remnants
3Strength
If the fabric has high fiber density, then structural integrity is improved, but flexibility and tissue compatibility are reduced
Solution Approach 1:
The fabric is divided into layers with different fiber densities, allowing the overall structure to maintain integrity through the higher density second layer while the lower density first layer provides flexibility and tissue compatibility
Solution Approach 2:
Different layers have different local fiber densities optimized for their specific functions - the first layer has lower density for flexibility and tissue compatibility, while the second layer has higher density for structural support, creating a composite structure with balanced properties
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 reduces trauma during application and removal, promotes granulation tissue growth, and minimizes the risk of leaving fragments in the wound, thereby enhancing wound healing and patient comfort.
Implementation Method 1
applying a hydrophilic material to the plurality of fibers
Implementation Method 2
reducing pressure in proximity to a tissue site may augment and accelerate growth of new tissue at the tissue site
Data Source
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Figure 2
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AI summary
A method may include forming a mesh comprising a plurality of strands meshed together. Each of the plurality of strands may include a polymeric film. The method may include perforating the mesh to form a perforated mesh having one or more perforations. The method may further include texturing the perforated mesh to form at textured and perforated mesh having at least one of a dimple or a channel. A system may include a cover configured to form a seal over the tissue site. The system may also include a reduced-pressure source configured to provide reduced pressure through the cover at the tissue site. The system may further include a tissue interface configured to be disposed underneath the cover at the tissue site. The tissue interface may include a textured mat having a plurality of strands of polymeric film matted together and at least one of a dimple or a channel.