Negative Pressure Wound Dressing with Silicone Gel Seal
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Solution Overview
Problem
Existing negative-pressure wound dressings are cumbersome and lack effective sealing, leading to inefficiencies in maintaining a consistent negative pressure environment, especially during patient movement and daily activities.
Innovation Solution
A wound dressing design featuring a thin, semi-permeable polyurethane drape with a pressure-sensitive acrylic-based adhesive, an island of super-absorbent material, and a silicone gel backing film, which creates a secure negative pressure environment by maintaining a vacuum and allowing for easier application and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional negative-pressure wound dressing is used, then a vacuum can be applied to the wound site, but the dressing is cumbersome and lacks effective sealing, leading to inability to maintain consistent negative pressure during patient movement
Solution Approach 1:
The patent combines multiple sealing functions into a single integrated drape structure that includes both the adhesive layer for skin attachment and the sealing layer for vacuum maintenance. This merging of functions eliminates the need for separate sealing components, reducing device complexity while maintaining reliable sealing during patient movement.
Solution Approach 2:
The drape is constructed as a composite structure with an adhesive layer and a sealing layer, each made from specific materials optimized for their function. The adhesive layer provides secure skin attachment, while the sealing layer maintains the vacuum seal. This composite approach enables both reliable sealing and simplified structure by integrating multiple functions into a coordinated material system.
2Reliability
If a secure seal is maintained during patient movement, then negative pressure consistency is improved, but the dressing becomes more complex and difficult to apply
Solution Approach 1:
The drape is divided into functionally distinct segments: an adhesive layer for skin attachment and a sealing layer for vacuum maintenance. This segmentation allows each layer to be optimized for its specific function while simplifying the overall application process, as each segment can be applied in a straightforward manner without requiring complex integration steps.
Solution Approach 2:
Different regions of the drape have different properties tailored to their specific functions. The adhesive layer has adhesive properties optimized for skin attachment, while the sealing layer has properties optimized for maintaining the vacuum seal. This local differentiation of properties enables reliable negative pressure consistency while keeping the application process simple, as each region performs its designated function without requiring complex coordination.
3Ease of operation
If a thin film drape is used to maintain negative pressure, then flexibility and ease of handling are improved, but sealing effectiveness may be compromised
Solution Approach 1:
The thin film drape is constructed as a composite of an adhesive layer and a sealing layer. The adhesive layer provides flexibility and ease of handling for application, while the sealing layer ensures effective sealing and vacuum maintenance. This composite structure resolves the contradiction by allowing the thin film to remain flexible while the integrated sealing layer guarantees sealing effectiveness.
Solution Approach 2:
The adhesive and sealing functions are merged into a single thin film drape structure. This integration allows the drape to maintain flexibility and ease of handling as a thin film while simultaneously providing effective sealing through the combined adhesive and sealing layers, eliminating the need for thicker or more rigid materials.
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 around the wound site for extended periods, ensuring a secure seal and ease of handling, even during patient movement, while preventing fluid leakage and promoting better wound healing.
Implementation Method 1
a pressure-sensitive acrylic-based adhesive on a skin-facing surface of the drape
Implementation Method 2
a silicone gel on the silicone gel backing film... surrounds the island of absorbent material
Implementation Method 3
an island of absorbent material... the absorbent material can include a super absorbent acrylate
Data Source
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AI summary
A dressing includes a drape, a pressure-sensitive acrylic-based adhesive on a skin-facing surface of the drape, an island of absorbent material, a silicone gel backing film, and a silicone gel on the silicone gel backing film. The drape is a thin film capable of maintaining a negative pressure underneath the drape upon application of a vacuum. The island of absorbent material has a smaller area than the drape and is applied onto the skin-facing surface of the drape. The silicone gel backing film has a frame shape and a smaller footprint than the drape and a larger footprint than the island of absorbent material.