Low-Profile Wound Therapy Connector With Isolated Pressure Pathways
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Solution Overview
Problem
Existing negative-pressure therapy systems lack efficient integration of pressure feedback and fluid pathways, leading to potential blockages and suboptimal wound healing outcomes.
Innovation Solution
A low-profile, breathable conduit system with pneumatically isolated fluid pathways for negative-pressure delivery and feedback, utilizing hydrophobic materials to prevent exudate ingress and blockage, and differentiated materials for each pathway to manage pressure and fluid flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single integrated conduit system is used for negative-pressure therapy, then device complexity is reduced, but fluid pathway blockage risk increases due to lack of pneumatic isolation
Solution Approach 1:
The conduit system is divided into multiple pneumatically isolated fluid pathways (first fluid pathway for negative pressure delivery, second fluid pathway for pressure feedback) within a single conduit structure. This segmentation allows independent operation of each pathway, preventing blockage in one pathway from affecting the other, thus maintaining reliability while keeping the overall device structure integrated and relatively simple.
Solution Approach 2:
A hydrophobic barrier layer is introduced as an intermediary element between the fluid pathways and exudate sources. This barrier layer selectively prevents exudate ingress into the fluid pathways while allowing pressure transmission, thereby reducing blockage risk without requiring complex isolation mechanisms for each pathway.
2Reliability
If hydrophobic materials are used to prevent exudate ingress, then pathway blockage resistance improves, but material selection complexity increases
Solution Approach 1:
Hydrophobic materials are applied locally only at specific interfaces where exudate ingress is most likely (such as at the tissue interface and pathway entrances), rather than throughout the entire conduit system. This localized application maintains effective exudate prevention while minimizing the overall material selection complexity and manufacturing burden.
Solution Approach 2:
The system utilizes porous hydrophobic materials that allow pressure transmission while blocking exudate based on surface tension properties. These materials provide effective exudate ingress prevention through their inherent physical properties, simplifying the overall material selection process compared to requiring multiple different materials with varying properties.
3Device complexity
If pressure feedback pathway is integrated into the same conduit, then device complexity is reduced, but pressure measurement accuracy decreases due to fluid contamination risk
Solution Approach 1:
The conduit system is segmented into pneumatically isolated pathways, with the pressure feedback pathway physically separated from the negative pressure delivery pathway. This segmentation prevents fluid contamination from affecting the pressure sensor while maintaining an integrated conduit structure, thereby preserving measurement precision without requiring completely separate conduits.
Solution Approach 2:
A hydrophobic barrier serves as an intermediary element that allows pressure transmission from the tissue site to the feedback pathway while blocking exudate and other contaminants. This intermediary protection maintains pressure measurement accuracy even though the feedback pathway is integrated within the same conduit structure.
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
Enhances wound healing by maintaining consistent negative pressure and fluid management, reducing blockages, and promoting tissue growth through improved pressure feedback and fluid distribution.
Implementation Method 1
utilizing hydrophobic materials to prevent exudate ingress and blockage
Data Source
AI summary
Systems, apparatuses, and methods for providing negative pressure to a tissue site are disclosed. Illustrative embodiments may include an apparatus or system for delivering negative-pressure to a tissue site, which can be used in conjunction with low-profile distribution components for wound therapy. Such apparatus may include a low-profile dressing interface or connector comprising at least two side-by-side fluid pathways fluidly coupled to a recessed space of the connector, one for providing negative pressure to a tissue interface or manifold and the other for sensing the negative pressure within the recessed space adjacent the tissue interface. In some embodiments, for example, the apparatus may comprise a first layer of polymeric film having an outer surface, an inner surface, and a plurality of features extending from the inner surface, and a second layer of polymeric film coupled to the first layer. The second layer may have an outer, tissue-facing surface and an inner surface coupled to the first layer and covering the plurality of features to form an enclosed space with the inner surface of the first layer and a plurality of flow channels within the enclosed space. The second layer also includes an aperture defining the recessed space adapted to fluidly coupling the enclosed space to the tissue interface.