Moisture-Permeable Support Device with Nonabsorbent Cushioning
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Solution Overview
Problem
Medical devices secured to the skin with rigid securement methods can cause discomfort, irritation, and pressure ulcers, and existing wound dressings are either not comfortable or excessively absorbent, making them unsuitable for long-term use.
Innovation Solution
A support device comprising a backing layer, a cushioning element, and a base layer, where the backing layer is highly moisture vapor permeable and liquid water impermeable, the cushioning element is deformable and nonabsorbent, and the base layer is contiguous with an adhesive, allowing for secure attachment to the skin while preventing fluid absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If foam material is used in wound dressings to provide cushioning, then comfort is improved, but fluid absorption increases requiring frequent changes
Solution Approach 1:
The dressing is segmented into distinct functional layers: a foam cushioning layer for comfort and a separate highly absorbent core layer for fluid management. This segmentation allows each layer to perform its specific function optimally without the foam absorbing excessive fluid.
Solution Approach 2:
A liquid-impermeable membrane acts as an intermediary barrier between the foam cushioning layer and the environment, preventing fluid from reaching and saturating the foam while still allowing the foam to provide its cushioning function.
2Strength
If rigid securement devices are used to attach medical devices to skin, then securement strength is improved, but skin irritation and pressure ulcers increase
Solution Approach 1:
The dressing uses a flexible foam layer and thin film structure that can conform to the skin surface and medical device shape, providing securement through adhesion and conformability rather than rigid mechanical fixation, thereby preventing skin irritation and pressure ulcers.
3Reliability
If transparent film dressings are used to protect insertion sites, then barrier protection is improved, but sufficient cushioning comfort is not provided
Solution Approach 1:
The dressing combines multiple materials with different properties: a transparent or translucent film layer for barrier protection and visibility, a foam layer for cushioning and comfort, and a highly absorbent core for fluid management. This composite structure integrates the benefits of each material while mitigating their individual limitations.
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 support device provides comfort, prevents irritation and pressure ulcers, and allows for easy cleaning without fluid absorption, extending the duration before needing to be changed.
Implementation Method 1
the backing layer is highly moisture vapor permeable and the first surface of the backing layer is liquid water impermeable
Implementation Method 2
The second surface of the base layer comprises an adhesive
Data Source
Figure 1~3
Figure 4
AI summary
The disclosed support device includes a contained cushioning element, which allowing for cleaning of the support device but limiting absorption of fluid into the cushioning element. The support device comprises a backing layer, a cushioning element, and a base layer. The backing layer comprises a first surface and second surface, opposite the first surface, wherein the backing layer is highly moisture vapor permeable and the first surface of the backing layer is liquid water impermeable. The cushioning element is positioned adjacent the second surface of the backing layer. The base layer comprises a first surface adjacent the cushioning element and a second surface, opposite the first surface of the cushioning element. The base layer is highly moisture vapor permeable. The base layer is entirely contiguous. The second surface of the base layer comprises an adhesive. The base layer and backing layer connect entirely around the cushioning element.