Concentric Barrier Dressing with Gap Indicator
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Solution Overview
Problem
Central line associated bloodstream infections and other transcutaneous or percutaneous device-related infections pose significant health risks and costs due to liquid infiltration, particularly during bathing or showering, where existing dressings fail to effectively prevent contamination.
Innovation Solution
A dressing comprising a liquid-resistant sheet with concentric liquid barrier/adhesive strips separated by a gap, optionally filled with an absorbent or liquid indicator, to prevent and detect liquid infiltration around medical devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single liquid barrier strip is used in existing dressings, then the structure is simple, but the detection of liquid infiltration is delayed or missed
Solution Approach 1:
The liquid barrier is divided into multiple concentric strips (first liquid barrier strip and second liquid barrier strip) separated by a gap. This segmentation allows independent detection zones, enabling reliable detection of liquid infiltration at different stages and locations, thereby improving detection reliability while maintaining manageable structural complexity.
Solution Approach 2:
A liquid indicator is placed in the gap between the first and second liquid barrier strips. This intermediary element provides visual feedback when liquid infiltrates through the first barrier, enabling timely detection and alerting users to replace the dressing before infection can occur, thus improving reliability without requiring complex electronic sensors.
2Reliability
If the liquid barrier strips are placed close together, then the dressing structure is compact, but the liquid indicator cannot effectively detect infiltration
Solution Approach 1:
The liquid indicator is positioned in the radial dimension between concentric circular barrier strips, creating a dedicated detection zone in the gap area. This dimensional arrangement allows the indicator to effectively detect liquid infiltration from the center outward without requiring excessive overall dressing area, maintaining compactness while ensuring reliable detection.
3Reliability
If existing dressings are used during bathing, then patients can maintain hygiene, but liquid infiltration occurs leading to infection
Solution Approach 1:
The dressing is applied with multiple liquid barrier strips and a liquid indicator in place before bathing or potential liquid exposure. The concentric barriers are positioned to prevent liquid infiltration at the source, and the indicator is pre-positioned to detect any breaches beforehand, enabling proactive protection and timely replacement before infection can develop.
Solution Approach 2:
The dual concentric liquid barrier strips create redundant protection layers that cushion against liquid infiltration. If the first barrier is compromised, the second barrier provides additional protection, and the liquid indicator in the gap alerts users to the breach, allowing replacement before harmful liquid reaches the wound or insertion site.
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 quickly indicates when the barrier is compromised, allowing timely replacement and reducing the risk of infection, thereby improving patient safety and healthcare costs.
Implementation Method 1
disposed within the gap is a liquid indicator
Data Source
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.