NPWT Drape Layer Structure for Pump Switching Without Wound Disruption
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Solution Overview
Problem
Existing wound treatment technologies face challenges in efficiently managing wound exudate and maintaining optimal negative pressure therapy across different stages of wound healing, requiring multiple systems and potential disruption of the wound site.
Innovation Solution
A system comprising a drape with a cover layer, support layer, spacer layer, and wound contact layer, along with a suction adapter, allows for fluid-tight sealing and flexible application of negative pressure, enabling seamless transition between different therapy stages without disrupting the wound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a larger pump and canister system is used for initial wound treatment with high exudate, then exudate collection capacity is improved, but device complexity and portability deteriorate
Solution Approach 1:
The drape is divided into multiple functional layers including a cover layer with opening for pump connection, support layer with perforations, spacer layer for pressure distribution, and wound contact layer with adhesive. This segmentation allows each layer to perform its specific function optimally while enabling transition between therapy stages by removing the cover layer and using the support layer as a base for the pump adapter.
Solution Approach 2:
The system is designed to be dynamic and adaptable to different wound healing stages. The cover layer can be removed when exudate production decreases, allowing transition from a larger pump system to a smaller portable device. The support layer remains as a base structure, enabling flexible reconfiguration of the therapy system according to wound progression.
2Adaptability or versatility
If multiple TNP systems are used at different healing stages, then therapy optimization is improved, but disruption of wound site increases
Solution Approach 1:
The drape is pre-assembled with the support layer, spacer layer, and wound contact layer in place before the cover layer is applied. This preliminary configuration allows the wound site to remain covered and protected during transitions between therapy stages. The support layer with its perforations and the spacer layer are already positioned to maintain negative pressure distribution even when the cover layer is removed for pump exchange.
Solution Approach 2:
The support layer acts as an intermediary structure between the wound contact layer and the cover layer. It provides a stable base with integrated perforations that maintain the negative pressure pathway even when the cover layer is removed. This intermediary structure prevents direct disruption to the wound site during system transitions.
3Reliability
If the support layer is positioned immediately below the cover layer with exposed portion, then fluid tight seal is improved, but manufacturing complexity increases
Solution Approach 1:
The support layer is merged with the cover layer positioning system. The support layer is positioned immediately below the cover layer with a specific exposed portion that receives the pump adapter. This merging of positioning functions ensures proper alignment and fluid tight sealing while simplifying assembly through integrated design.
Solution Approach 2:
The support layer has different properties in different regions: the portion immediately below the cover layer provides fluid tight sealing and structural support, while the exposed portion facilitates pump adapter attachment. This local differentiation of function within the support layer achieves reliable sealing without requiring complex 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
Facilitates consistent negative pressure therapy, effectively managing wound exudate and promoting healing by reducing tissue edema, enhancing blood flow, and minimizing bacterial load, while maintaining a stable wound environment.
Implementation Method 1
a source of negative pressure... applying negative pressure to the wound through the suction adapter
Implementation Method 2
The wound contact layer carries an adhesive portion on a lower surface thereof, the adhesive portion for forming a substantially fluid tight seal over a wound site
Implementation Method 3
a spacer layer for distributing negative pressure beneath the cover layer
Implementation Method 4
The cover layer is moisture vapor permeable
Data Source
AI summary
Disclosed embodiments related to a drape for use in a negative pressure wound therapy (NPWT). The drape comprises a cover layer, a spacer layer, and a wound contact layer. The drape further comprises a support layer and a reinforcement member. A negative pressure wound therapy (NPWT) apparatus, such as a suction adapter or a wound dressing may be coupled to the drape applied on a wound. The drape may withstand multiple coupling and decoupling of NPWT apparatuses, and can be stay on the wound during coupling and decoupling of NPWT apparatuses. The drape may be coupled with two or more different types of NPWT apparatuses.