Concentric Adhesive Strips with Gaps for Liquid Infiltration Detection
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Solution Overview
Problem
Central line associated bloodstream infections and other infections caused by transcutaneous or percutaneous medical devices are prevalent, leading to significant morbidity and healthcare costs, with existing dressings failing to effectively prevent liquid infiltration and contamination.
Innovation Solution
A dressing featuring a liquid-resistant sheet with concentric, impermeable adhesive strips and a gap filled with a liquid indicator or absorbent material, which prevents liquid infiltration and alerts caregivers to dressing compromise through visible changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard dressing is used to cover a transcutaneous medical device, then the dressing provides basic wound coverage, but it fails to prevent liquid infiltration and contamination leading to infection
Solution Approach 1:
The adhesive portion of the dressing is segmented into multiple concentric strips with gaps between them. These gaps create channels that allow visual inspection of the skin beneath the dressing without removing it, enabling early detection of liquid infiltration or infection while maintaining overall dressing integrity and protection.
Solution Approach 2:
The dressing incorporates regions with different properties: the adhesive strips provide secure attachment and barrier protection, while the gaps between strips provide visual access to the skin. This local differentiation allows the dressing to simultaneously maintain protection and enable monitoring of the skin condition.
2Reliability
If the dressing is made completely impermeable to liquids, then liquid infiltration is prevented, but the dressing cannot allow visual inspection of the skin beneath without removal
Solution Approach 1:
The adhesive barrier is divided into segmented concentric strips with intentional gaps. The strips maintain liquid barrier functionality while the gaps provide visual access channels, allowing the dressing to simultaneously provide protection and enable skin inspection without removal.
Solution Approach 2:
The gaps between adhesive strips serve as intermediary zones that allow light to pass through to the skin and reflect back to the observer's eye. This intermediary structure enables visual inspection of the skin condition without compromising the liquid barrier provided by the adhesive strips.
3Reliability
If adhesive strips are placed close together to maximize coverage, then protection is improved, but the ability to detect liquid infiltration is reduced
Solution Approach 1:
The adhesive coverage is segmented into concentric strips with controlled gaps between them. This segmentation maintains sufficient adhesive coverage for protection while creating visual access points that enable detection of liquid infiltration through the gaps without removing the dressing.
Solution Approach 2:
The dressing structure alternates between adhesive regions ( providing protection) and gap regions (enabling detection). This local quality differentiation allows simultaneous achievement of prophylactic protection and infiltration detection capabilities.
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 dressing effectively prevents liquid infiltration and contamination, providing extended prophylactic protection and facilitating timely dressing replacement, thereby reducing infection risks and healthcare costs.
Implementation Method 1
the gap is filled with a liquid indicator
Data Source
Figure 1
Figure 2A
Figure 2B~3
AI summary
Wounds and temporary appliances can be protected against liquid contamination using a prophylactic dressing. The dressing includes a liquid resistant sheet and disposed thereon a first liquid barrier/adhesive strip and a second liquid barrier/adhesive strip wherein the first and second liquid barrier/adhesive strips are concentric; located at or near the periphery of the liquid resistant sheet; and are separated from one another by a gap. Adsorbent's and liquid indicators can be employed within the gap to add further functionality to the dressing. Also disclosed herein is a support useful for stabilizing leads to transcutaneous or percutaneous devices.