Asymmetric Decompression Wrap Seal Design
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Solution Overview
Problem
Swelling associated with trauma or certain pathologies can cause discomfort, limit range of motion, and interfere with medical imaging and treatment, necessitating effective swelling reduction methods at tissue sites.
Innovation Solution
A decompression wrap system featuring an occlusive layer, a manifold layer, and a pump to establish negative pressure, creating a sealed chamber that reduces swelling by increasing blood perfusion and facilitating wound healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the occlusive layer extends beyond the manifold layer in both lateral directions, then the seal integrity is improved, but the device complexity and material usage increase
Solution Approach 1:
The occlusive layer is designed to extend beyond the manifold layer asymmetrically - specifically in only one lateral direction rather than both directions. This asymmetric configuration maintains the necessary seal integrity for negative pressure application while reducing material usage and device complexity compared to a symmetric extension design.
2Reliability
If the occlusive layer extends beyond the manifold layer by a large margin, then the seal integrity is improved, but the ease of operation deteriorates due to difficulty in wrapping and sealing
Solution Approach 1:
The asymmetric extension design with a controlled margin (e.g., 2-5 cm) in one lateral direction provides sufficient overlap for reliable sealing while maintaining manageable dimensions for ease of wrapping and application to patient anatomy.
Solution Approach 2:
The extension margin is optimized to specific parameter ranges (e.g., 2-5 cm) that balance seal integrity requirements with operational ease, preventing both insufficient sealing and excessive difficulty in application.
3Reliability
If the adhesive provides a substantially air-tight seal, then the reliability of negative pressure maintenance is improved, but the difficulty of detecting and measuring seal integrity increases
Solution Approach 1:
The adhesive layer acts as an intermediary between the occlusive and manifold layers, providing the air-tight seal necessary for negative pressure maintenance. The adhesive's properties are engineered to achieve reliable sealing while remaining detectable through appropriate inspection methods.
4Adaptability or versatility
If the manifold layer is made of open-celled foam for flexibility, then the adaptability to tissue contours is improved, but the air-impermeability required for sealing deteriorates
Solution Approach 1:
The open-celled foam manifold layer provides local flexibility and adaptability to tissue contours where needed, while the occlusive layer provides the air-impermeable barrier function. Each layer is optimized for its specific function rather than requiring a single material to fulfill both contradictory requirements.
Solution Approach 2:
The system uses composite construction with an open-celled foam manifold layer combined with an air-impermeable occlusive layer. This composite structure allows the foam to provide flexibility and adaptability while the occlusive layer ensures air-tight sealing for negative pressure maintenance.
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 promotes healing by applying negative pressure to tissue sites, potentially reducing swelling to an acceptable level within 3 to 7 days, facilitating access for medical procedures and improving recovery outcomes.
Implementation Method 1
a pump configured to be placed in fluid communication with the manifold layer and operable to remove air from the manifold layer
Implementation Method 2
the manifold layer is configured to collapse toward the occlusive layer when a negative pressure is established at the manifold layer
Implementation Method 3
an adhesive provided on the occlusive layer and configured to seal a first longitudinal section of the occlusive layer to a second longitudinal section of the occlusive layer
Data Source
AI summary
A decompression wrap includes an occlusive layer formed as a first strip having a longitudinal axis, a manifold layer coupled to the occlusive layer and formed as a second strip extending parallel to the longitudinal axis. The occlusive layer extends beyond the manifold layer in a first lateral direction perpendicular to the longitudinal axis. The decompression wrap also includes an adhesive provided on the occlusive layer and configured to seal a first longitudinal section of the occlusive layer to a second longitudinal section of the occlusive layer when the decompression wrap is wrapped around a tissue site.