Removable Filter Layer for Light Deactivated Adhesive Drapes
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Solution Overview
Problem
Existing light deactivated adhesive drape systems face issues with premature deactivation due to exposure to visible light, requiring opaque cover layers that obstruct visibility and restricting patient mobility under sunlight, especially during transitions from acute to post-acute settings.
Innovation Solution
A light deactivated adhesive drape system with a removable filter layer that blocks specific light wavelengths using a photosensitive adhesive layer and a flexible film layer, where the filter layer can be dissolved with a solvent like isopropyl alcohol, allowing controlled exposure to deactivation light and maintaining transparency for wound inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an opaque cover layer is used to block visible light and prevent premature adhesive crosslinking, then the adhesive deactivation is prevented, but the transparency for wound inspection is lost
Solution Approach 1:
The cover layer is segmented into multiple layers: a transparent flexible film layer that allows wound visibility and a removable filter layer that blocks deactivation light wavelengths. This segmentation allows each layer to perform its specific function without compromising the other.
Solution Approach 2:
The removable filter layer acts as an intermediary between the adhesive layer and the ambient light. It selectively blocks deactivation light wavelengths while allowing the flexible film layer to maintain transparency for wound inspection. The filter layer can be removed when adhesive deactivation is desired.
2Loss of information
If long wavelength UV light is used to crosslink the adhesive, then opaque cover layers are not needed, but the patient cannot be exposed to sunlight due to UV spectra
Solution Approach 1:
The filter layer is designed to block only specific deactivation light wavelengths (including UV and visible light that activate the adhesive) while allowing other wavelengths to pass through. This selective filtering enables patient mobility and sunlight exposure while maintaining adhesive functionality where needed.
Solution Approach 2:
The system transitions from a static opaque cover to a dynamic removable filter layer. The filter layer can be applied when adhesive protection is needed and removed when adhesive deactivation is desired, providing adaptability to different clinical situations and patient needs.
3Ease of operation
If visible light is used to deactivate the adhesive, then the adhesive transformation is effective, but premature deactivation occurs without opaque protection
Solution Approach 1:
The filter layer is applied in advance to protect the adhesive layer from premature exposure to deactivation light wavelengths. The filter layer remains in place during adhesive application and initial bonding, and is removed only when adhesive deactivation is intentionally desired.
Solution Approach 2:
The system changes the light wavelength parameters that the adhesive responds to. By using an adhesive that deactivates in response to specific visible light wavelengths (400-700nm) rather than only UV wavelengths, and pairing it with a filter layer that blocks these wavelengths, the system achieves both easy visible-light deactivation and protection from premature activation.
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
Enables easier and trauma-reduced removal of the drape without premature deactivation, allowing patients to be exposed to sunlight while preventing adhesive deactivation until intended, thus improving patient mobility and clinician visibility.
Implementation Method 1
a removable filter layer configured to block the plurality of light wavelengths that activate the at least one release agent
Implementation Method 2
The visible light would deactivate the adhesive tack of the drape system by crosslinking the adhesive so that it irreversibly transformed the adhesive composition from a viscoelastic state to an elastic state
Implementation Method 3
the filter layer is configured to be removable upon exposure to a solvent
Data Source
AI summary
Provided herein is a system and method for mitigating premature light deactivation of light deactivated adhesive drapes. One aspect provides a system comprising a drape, a photosensitive adhesive layer, and a release agent, where the system is adapted to be coupled to a tissue site and released therefrom upon or after exposure to an external stimulus such as certain wavelengths of light. The system may have a filter layer to prevent the photosensitive adhesive from being exposed to deactivation wavelengths prematurely. The filter layer may be printed directly onto the drape and may be removable after exposure to a solvent, such as isopropyl alcohol (IPA). The filter layer may also be a filter adhesive layer. Another aspect provides a method for application and removal of a drape using by removing one or more of the filter layer and/or the filter adhesive layer and applying light to the drape to deactivate the photosensitive adhesive layer and promote easy, clean, and less painful removal of the drape.