Full-Surround Antimicrobial Dressing for Catheter Site Inspection

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Solution Overview

Problem

Existing medical dressings for skin insertion sites of medical devices like catheters often fail to fully surround the site, leading to partial separation and inadequate protection against infection, and lack transparency for visual inspection.

Innovation Solution

A full-surround contact antimicrobial dressing with a transparent body and a slit extending from a central hole, featuring an antimicrobial adhesive, ensures complete coverage of the skin insertion site and allows visual inspection, using materials like polyurethane film and silicone-based adhesive with chlorhexadine gluconate and silver for infection prevention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing medical dressings are used, then the dressing can be applied to the skin insertion site, but the dressing fails to fully surround the site leading to partial separation and inadequate protection

Engineering Contradiction:

Improveprotection against infectionVSAvoidfull surround contact

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The dressing body includes a slit that divides the continuous structure into segments that can be separated and reconfigured. This segmentation allows the dressing to be placed around the medical device and then brought together to form a complete surround, ensuring full contact with the skin insertion site without partial separation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dressing transitions from a two-dimensional flat structure to a three-dimensional enveloping structure through the use of the slit. The slit allows the dressing to be opened, placed around the device, and then closed to create a three-dimensional full-surround configuration that completely encircles the insertion site

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Difficulty of detecting and measuring

If existing medical dressings are used, then the dressing can cover the insertion site, but the dressing lacks transparency for visual inspection

Engineering Contradiction:

Improvevisual inspection capabilityVSAvoidmicrobial colonization

Core Design Contradiction:

Difficulty of detecting and measuringVSObject-affected harmful factors

Solution Approach 1:

The dressing body is made transparent, allowing visual inspection of the skin insertion site through the dressing material. This transparency enables healthcare providers to detect signs of infection or complications without removing the dressing, while the antimicrobial adhesive simultaneously prevents microbial colonization

Inventive Principle:

Principle #32Color changes

3Shape

If a slit is added to enable full surround contact, then the dressing can fully surround the device, but the device complexity increases

Engineering Contradiction:

Improvefull surround contactVSAvoiddressing structure

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The slit provides a simple segmentation of the dressing body that enables full surround contact. The segmentation is achieved through a single continuous slit rather than multiple complex components, maintaining simplicity while achieving the desired three-dimensional configuration

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dressing body is constructed as a flexible thin film that can be easily opened along the slit, placed around the medical device, and then closed to form a complete surround. The flexibility and thinness of the material simplify the overall structure while enabling the full-surround configuration

Inventive Principle:

Principle #30Flexible shells and thin films

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 microbial colonization and enables direct observation of the skin insertion site, ensuring comprehensive infection protection and visibility for early detection of infections.

Implementation Method 1

an antimicrobial adhesive substance configured to prevent microbial colonization at the skin insertion site

Methodology Applied

Scientific EffectAntimicrobial action:

Implementation Method 2

The transparence of the dressing body enables inspection of the skin insertion site to determine whether any infection is present

Methodology Applied

Scientific EffectLight transmission: Light

Data Source

PatentEP3681545B1Antimicrobial dressing with liner for a medical device

Publication Date: 2025.10.29 BARD ACCESS SYSTEMS INC

Figure 1~2A
Figure 2B~2C
Figure 3A~3B

AI summary

A full-surround contact antimicrobial dressing is disclosed. The dressing includes a transparent body that covers a skin insertion site through which a catheter assembly passes for disposal within the body of a patient. The transparency of the dressing body enables inspection of the skin insertion site. In one embodiment, therefore, an antimicrobial full-surround contact dressing for use with a medical device inserted into a skin surface of a patient via a skin insertion site is disclosed and comprises a transparent flat body, an antimicrobial adhesive substance disposed on a bottom surface of the body, and a slit defined in the body. The slit is configured to enable the body to be placed fully around a perimeter of the medical device on the skin surface at the skin insertion site such that the bottom surface of the body fully surrounds and contacts the skin insertion site.