Multi-Layer NPWT Fluidic Connector for Pressure and Flow Control
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Solution Overview
Problem
Existing wound dressings for negative pressure wound therapy (NPWT) systems face challenges in effectively managing fluid flow and maintaining optimal pressure levels, which can impact wound healing and infection control.
Innovation Solution
A fluidic connector for NPWT systems is designed with multiple layers and passages, including an upper and lower fluid passage with spacer materials, allowing for controlled fluid flow and pressure management, ensuring that fluid is aspirated through the wound while maintaining a sealed environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fluidic connector uses a simple single-layer structure, then the device complexity is reduced, but the ability to control fluid flow and maintain pressure levels deteriorates
Solution Approach 1:
The fluidic connector is divided into multiple layers (first layer, second layer, third layer) with distinct functions. The first layer provides structural support and defines the lower fluid passage, the second layer contains spacer material to define the upper fluid passage, and the third layer provides sealing. This segmentation allows each layer to be optimized for its specific function, improving overall fluid flow control while keeping individual layers relatively simple.
Solution Approach 2:
The invention transitions from a single-layer planar structure to a multi-layer three-dimensional structure. By adding the vertical dimension with multiple layers separated by spacer material, the connector can independently control fluid flow paths, maintain pressure differentials, and provide sealing without requiring complex in-plane features.
2Reliability
If the connector uses multiple layers with spacer materials, then fluid flow control is improved, but the device complexity increases
Solution Approach 1:
The connector layers are made from flexible materials that can be formed into thin-film structures. The first layer, second layer, and third layer are all flexible membranes that can be sealed together, while the spacer material provides the necessary dimensional separation. This approach allows complex three-dimensional fluid passage control using relatively simple thin-film fabrication techniques.
3Strength
If the lower fluid passage is completely enclosed by spacer material, then structural integrity is improved, but the ability to aspirate fluid through the wound deteriorates
Solution Approach 1:
The spacer material is positioned to provide structural support in specific locations rather than completely enclosing the lower fluid passage. The distal end of the upper channel spacer extends beyond the lower channel spacer to provide local reinforcement where needed, while leaving the lower fluid passage open at critical areas to allow fluid aspiration through the wound. This localized approach maintains structural integrity without compromising fluid flow.
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 fluidic connector enhances the effectiveness of NPWT by optimizing fluid management, reducing bacterial load, and promoting wound healing by maintaining optimal pressure levels and minimizing wound disturbance.
Implementation Method 1
When negative pressure from the source of negative pressure is applied to the lower fluid passage, the portion in the lower fluid passage can collapse blocking fluid flow between the lower channel spacer material and the upper channel spacer material through the portion in the lower fluid passage
Data Source
AI summary
Disclosed herein are negative pressure appliances and methods of operating the same in the treatment of wounds with negative pressure. Also disclosed are improved fluidic connectors or suction adapters for connecting a negative pressure source to a wound, having an air leak channel separated from a suction channel.