Formed 3D Textile Dressing for Negative-Pressure Joint Therapy
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Solution Overview
Problem
Existing negative pressure wound therapy (NPWT) systems struggle to effectively treat joint injuries due to limitations in providing adequate compression and circulation enhancement, particularly in areas with high curvature and mobility, such as knees, elbows, and shoulders.
Innovation Solution
A negative pressure dressing system comprising a compressive layer with varying material properties and channel/rib configurations that collapse vertically and laterally under negative pressure, generating lifting forces to enhance blood and lymph fluid circulation, reducing swelling and inflammation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional NPWT system is used, then wound drainage is achieved, but adequate compression and circulation enhancement cannot be provided to joint areas with high curvature and mobility
Solution Approach 1:
The compressive layer is designed with varying material properties including regions of different compression moduli and thicknesses that allow the dressing to dynamically adapt to joint movement and curvature while maintaining effective compression forces. The material properties vary in different regions to accommodate the dynamic nature of joint areas.
Solution Approach 2:
The compressive layer incorporates regions with different material properties (different compression moduli and thicknesses) tailored to specific anatomical locations. High curvature areas receive appropriate compression through localized material property adjustments, ensuring effective treatment across varying joint geometries.
2Area of stationary object
If uniform compression is applied to a joint area, then coverage is achieved, but circulation enhancement and swelling reduction are insufficient
Solution Approach 1:
The compressive layer features spatially varying material properties including different compression moduli and thicknesses in different regions. This localized variation optimizes circulation enhancement and swelling reduction in specific areas while maintaining overall coverage of the joint region.
Solution Approach 2:
The compressive layer varies properties in multiple dimensions (thickness, compression modulus) to create a three-dimensional structure that enhances circulation through controlled compression gradients, moving beyond simple uniform two-dimensional coverage.
3Force
If the compressive layer is made thicker to increase compression force, then compressive effect is improved, but adaptability to joint movement and curvature is reduced
Solution Approach 1:
The compressive layer uses localized variations in thickness and material properties to provide appropriate compression forces in different regions without requiring uniform thickness throughout. This allows thick regions to provide high compression where needed while thin regions maintain flexibility and adaptability.
Solution Approach 2:
The compressive layer employs composite material construction with varying compression moduli and thicknesses to achieve both high compressive force and adaptability. Different material regions work together to provide the necessary force while maintaining flexibility for joint movement.
4Device complexity
If a simple single-layer dressing is used, then device complexity is reduced, but the ability to provide customized compressive forces and enhance circulation is limited
Solution Approach 1:
The compressive layer is segmented into multiple functional regions with different material properties (different compression moduli and thicknesses) to provide customized compression forces. This segmentation allows each region to be optimized for its specific anatomical location while maintaining overall system integration.
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 effectively reduces swelling and inflammation at joint treatment sites by improving circulation through a combination of vertical and lateral compression, adapting to joint movement and providing customized compressive forces.
Implementation Method 1
a negative pressure source adapted to generate a negative pressure within the negative pressure dressing... The compressive layer is configured to collapse laterally and vertically under the negative pressure
Implementation Method 2
The compressive layer is configured to collapse laterally and vertically under the negative pressure. The compression in the lateral direction is larger than the compression in the vertical direction
Data Source
AI summary
A system for applying negative pressure to a joint positioned in a treatment area. The system includes a negative pressure dressing. The negative pressure dressing includes a compressive layer and a sealing layer. The compressive layer includes a first surface and a second, treatment area-facing. The compressive layer further includes a first elongated portion configured to be positioned proximate the joint. The first elongated portion includes a first end and a second end. The compressive layer further includes a second elongated portion spaced from the first elongated portion and configured to be positioned proximate the joint. The second elongated portion includes a first end and a second end. The compressive layer further includes an interconnecting portion extending between the first elongated portion and the second elongated portion. The interconnecting portion is configured to overlie at least a portion of the joint. The compressive layer further includes a plurality of channels formed in the first surface and extending proximate the second surface. The plurality of channels is formed in at least one of the first end and the second end of the first elongated portion and at least one of the first end and the second end of the second elongated portion. The sealing layer is configured to form a seal around a perimeter of the negative pressure dressing.