Conformable Negative-Pressure Wound Therapy with Segmented Chambers
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Solution Overview
Problem
Existing negative-pressure therapy systems lack improvements in components and processes that can enhance tissue growth and healing times, particularly for wounds.
Innovation Solution
A negative-pressure therapy device comprising a negative-pressure source, distribution components, and a controller with sensors to manage pressure and feedback mechanisms, along with a tissue interface and cover, to create a sealed therapeutic environment for enhanced tissue growth and healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid, non-conformable therapy device is used, then structural strength and durability are improved, but the ability to conform to irregular wound surfaces deteriorates
Solution Approach 1:
The therapy device is divided into multiple independently inflatable chambers that can be selectively inflated and deflated. Each chamber can be inflated to a predetermined pressure level, allowing the device to adapt its overall shape and conform to irregular wound surfaces while maintaining structural integrity through the segmented architecture.
Solution Approach 2:
The therapy device transitions from a static rigid structure to a dynamic inflatable structure. The chambers can be inflated and deflated on demand, allowing the device to change its shape and stiffness characteristics. This dynamic capability enables the device to conform to various wound geometries while maintaining sufficient structural strength during the therapy application.
2Adaptability or versatility
If multiple independently inflatable chambers are used, then conformability to irregular surfaces is improved, but device complexity increases
Solution Approach 1:
The therapy device is designed with multiple chambers that can serve multiple functions: each chamber can be independently inflated to different pressure levels, and chambers can be selectively activated based on the wound's geometric requirements. This multi-functionality allows a single device to handle various wound types and shapes without requiring multiple specialized devices.
Solution Approach 2:
The device utilizes controlled pressure changes within each chamber to achieve desired conformability. By adjusting the pressure level in individual chambers, the device can adapt to different wound surfaces. The control system manages these parameter changes systematically, balancing the complexity of multiple chambers with automated pressure regulation.
3Reliability
If high pressure is applied to ensure adequate therapy, then therapeutic effectiveness is improved, but the risk of tissue damage from pressure spikes deteriorates
Solution Approach 1:
The control system is programmed with predetermined pressure levels for each chamber based on the wound's geometric characteristics. Before applying pressure, the system pre-calculates and sets appropriate pressure targets, preventing excessive pressure application. This preliminary action ensures that pressure is applied at safe, effective levels from the start, avoiding pressure spikes that could cause tissue damage.
Solution Approach 2:
The control system continuously monitors pressure levels within each chamber and adjusts inflation/deflation operations accordingly. When a chamber approaches its predetermined pressure limit, the feedback mechanism automatically stops or reduces pressure application. This real-time feedback prevents pressure spikes and ensures therapeutic pressure is maintained within safe ranges throughout the therapy duration.
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 device promotes tissue growth and reduces healing times by applying controlled negative pressure, enhancing wound healing through improved fluid management and tissue interaction.
Implementation Method 1
The therapy device includes a plurality of inflatable chambers that can be selectively inflated and deflated
Implementation Method 2
A pump system can be used to inflate and deflate the chambers to a desired pressure level
Data Source
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AI summary
A negative-pressure therapy device includes a formed front layer, a pump, a pressure transducer, a formed rear layer, an exhaust port, a negative-pressure port, and an atmospheric pressure measurement port. The pump has a fluid inlet and a fluid outlet. The pressure transducer is fluidly coupled to the ambient environment and the pump. The formed rear layer is configured to be coupled to the formed front layer to form an interior space having the pressure transducer and the pump disposed therein. The exhaust port is fluidly coupled to the fluid outlet of the pump. The negative-pressure port is fluidly coupled to the fluid inlet of the pump.