Negative-Pressure Therapy Valve Control via Dual Feedback Paths
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Solution Overview
Problem
The cost and complexity of negative-pressure therapy systems pose challenges for manufacturers, healthcare providers, and patients, limiting their widespread application and effective operation.
Innovation Solution
An apparatus for negative-pressure therapy is designed with a negative-pressure source fluidly coupled to a distribution component, incorporating a pressure sensor with feedback paths and control valves, and a controller to manage fluid flow and pressure, enhancing control and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If negative-pressure therapy is implemented to accelerate tissue growth and improve wound healing, then therapeutic effectiveness is improved, but system cost and complexity increase
Solution Approach 1:
The system divides pressure monitoring and control into separate functional paths: a first feedback path for monitoring pressure at the wound site and a second feedback path for monitoring pressure at the negative-pressure source. This segmentation allows independent optimization of each monitoring function, improving overall system reliability while maintaining manageable complexity through modular design
Solution Approach 2:
A controller acts as an intermediary between the pressure sensor, negative-pressure source, and distribution component. The controller receives feedback from both feedback paths and coordinates their operation, enabling sophisticated pressure management without requiring direct complex interconnections between all system components, thus improving reliability while controlling complexity
2Manufacturing precision
If multiple feedback paths and control valves are added to improve pressure control precision, then control precision is improved, but device complexity increases
Solution Approach 1:
The control system is segmented into two distinct feedback paths with separate control valves: a first control valve regulating pressure in the distribution component and a second control valve regulating pressure at the negative-pressure source. This segmentation enables precise control at each critical point independently, achieving high pressure control precision while organizing complexity into manageable, modular components
Solution Approach 2:
The system implements dual feedback loops where pressure sensors monitor conditions at both the wound site and the negative-pressure source, and the controller adjusts the respective control valves based on this feedback. This multi-loop feedback structure enables precise pressure control throughout the system while distributing the control logic across multiple simple, dedicated control elements rather than one complex controller
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 reduces costs, simplifies the system, and improves the effectiveness of negative-pressure therapy by enabling precise control and feedback, thereby accelerating tissue growth and reducing healing times.
Implementation Method 1
a pressure sensor; a first feedback path from the pressure sensor to the negative-pressure source; a second feedback path from the pressure sensor to the distribution component
Data Source
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AI summary
In one example embodiment, an apparatus for providing negative-pressure therapy may comprise a negative-pressure source, a pressure sensor, and a control valve. The negative-pressure source may be configured to be fluidly coupled to a distribution component. The control valve may be fluidly coupled to the pressure sensor and configured to be selectively coupled to the negative-pressure source, the distribution component, or both. A controller may also be configured to operate the control valve to selectively couple the pressure sensor to at least one of the negative-pressure source and the distribution component through the control valve, and the pressure sensor may provide a feedback signal to the controller indicative of pressure in a feedback path associated with the position of the control valve. The controller may also be configured to operate the negative-pressure source based on the feedback signal.