Low-Profile Bridge for Negative Pressure and Instillation
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Solution Overview
Problem
Existing tissue treatment systems face challenges in efficiently delivering both negative pressure and instillation therapy to a tissue site, particularly in maintaining an open pathway for fluid flow and preventing unintended siphoning of instillation fluid during negative-pressure therapy.
Innovation Solution
The system employs a low-profile bridge configuration with separate pathways for negative pressure and instillation, where the instillation pathway is collapsible and interacts with the negative-pressure pathway to prevent fluid flow during therapy, ensuring that both therapies can be applied alternately without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bridge is used for both negative pressure and instillation pathways, then device complexity is reduced, but unintended siphoning of instillation fluid occurs during negative-pressure therapy
Solution Approach 1:
The bridge is segmented into separate pathways: a first pathway for negative pressure therapy and a second pathway for instillation therapy. This segmentation prevents fluid from one pathway from interfering with the other, eliminating the siphoning problem while maintaining a relatively simple overall structure.
Solution Approach 2:
A fluid communication valve acts as an intermediary between the two pathways and the tissue site. This valve controls fluid flow direction, allowing the system to switch between negative pressure therapy and instillation therapy without cross-contamination or unintended fluid movement.
2Reliability
If the instillation pathway is made collapsible to prevent siphoning, then fluid flow control improves, but pathway openness may be compromised
Solution Approach 1:
The instillation pathway is designed as a collapsible conduit that dynamically changes its state based on operational mode. During negative-pressure therapy, the pathway collapses to prevent siphoning; during instillation therapy, it opens to allow fluid flow. This dynamic behavior resolves the contradiction between preventing siphoning and maintaining pathway openness.
Solution Approach 2:
The collapsible instillation pathway automatically responds to pressure differentials without external control. When negative pressure is applied to the first pathway, it causes the second pathway to collapse, and vice versa. This self-regulating mechanism ensures proper fluid flow control without requiring active management.
3Reliability
If separate pathways are used for negative pressure and instillation, then unintended siphoning is prevented, but device complexity increases
Solution Approach 1:
The patent combines multiple therapy pathways into a single integrated bridge structure. The first and second pathways are incorporated into one bridge component that interfaces with the tissue site, eliminating the need for separate devices or complex multi-component assemblies.
Solution Approach 2:
The bridge is designed as a multi-functional component that handles both negative pressure therapy and instillation therapy through its separate pathways. This universal design allows one device to perform multiple therapeutic functions without requiring separate specialized components for each therapy type.
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
This configuration maintains an open pathway for both negative pressure and instillation, preventing fluid loss and ensuring effective tissue treatment by allowing for simultaneous or alternating application of both therapies.
Implementation Method 1
application of negative pressure to the negative-pressure pathway may collapse the instillation pathway, preventing or restricting fluid flow through the instillation pathway
Data Source
AI summary
Disclosed embodiments relate to devices and systems for providing both negative-pressure therapy and instillation. In some embodiments, both negative-pressure and instillation may be provided to a tissue site in a low-profile context that may also prevent siphoning of instillation fluid during negative pressure application. For example, a single bridge may include a negative-pressure pathway with supports and an instillation pathway, and the instillation pathway may be configured with respect to the negative-pressure pathway so that at least a portion of the instillation pathway collapses upon application of negative pressure to the negative-pressure pathway. Collapse of at least a portion of the instillation pathway may be sufficient to close the instillation pathway.