Reduced Pressure Dressing with Liquid-Air Separator
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Solution Overview
Problem
Current reduced pressure treatment systems for wounds are complex, costly, and require trained personnel, making them unsuitable for low-severity wounds and limiting mobility due to the need for separate canisters and electrical components, while existing dressings fail to optimize fluid storage and pressure transmission.
Innovation Solution
A reduced pressure dressing system with an interface layer, absorbent layer, diverter layer, and non-motor-driven pump that maintains pressure and inhibits liquid entry into the pump, allowing for efficient fluid absorption and pressure distribution without the need for external canisters or electrical components, enabling self-administration and improved mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a non-motor-driven pump is integrated into the dressing, then device complexity is reduced and mobility is improved, but the pump becomes susceptible to liquid damage requiring additional protective components
Solution Approach 1:
A liquid-air separator is introduced as an intermediary component between the absorbent layer and the pump. This separator mediates the interaction between liquid and the pump, allowing the pump to be protected from liquid damage while maintaining the integrated design that reduces system complexity and improves mobility.
Solution Approach 2:
The dressing is segmented into distinct functional layers: an absorbent layer for fluid absorption, a liquid-air separator for protecting the pump, and the pump itself for generating reduced pressure. This segmentation allows each component to perform its specific function while collectively reducing overall system complexity compared to external canister systems.
2Reliability
If a liquid-air separator is added to protect the pump, then pump reliability is improved, but device complexity increases
Solution Approach 1:
The liquid-air separator is merged with the absorbent layer and pump assembly, combining multiple functions (absorption, separation, and pressure generation) into a single integrated unit. This merging approach minimizes the increase in device complexity by eliminating the need for separate external canisters and components.
3Ease of operation
If the dressing is made self-contained without external canisters, then ease of operation is improved for self-administration, but fluid storage capacity is limited
Solution Approach 1:
The pump is nested within the dressing structure, with the liquid-air separator positioned between the absorbent layer and the pump. This nested arrangement creates a self-contained unit that can be easily applied and operated by patients while maximizing fluid storage capacity within the compact design.
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 system facilitates efficient fluid absorption and pressure distribution, reducing treatment complexity and cost, allowing for self-administration and improved mobility, while maintaining effective tissue treatment for a variety of wound severities.
Implementation Method 1
An absorbent layer is in fluid communication with the interface layer to absorb liquid from at least one of the interface layer and the tissue site
Implementation Method 2
A non-motor-driven pump is in fluid communication with the absorbent layer to deliver a reduced pressure to the tissue site
Data Source
AI summary
A reduced pressure dressing for applying reduced pressure treatment to a tissue site includes an interface layer adapted to be positioned at the tissue site. An absorbent layer is in fluid communication with the interface layer to absorb liquid from at least one of the interface layer and the tissue site. A non-motor-driven pump is in fluid communication with the absorbent layer to deliver a reduced pressure to the tissue site. A cover is positioned over the non-motor-driven pump, the absorbent layer, and the interface layer to maintain the reduced pressure at the tissue site, and a liquid-air separator is positioned between the absorbent layer and the non-motor-driven pump to inhibit liquid from entering the non-motor-driven pump.