Two-Layer Wound Dressing With Removable Cover
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Solution Overview
Problem
Frequent removal of wound dressings can be painful and cause damage to the skin, interfering with the healing process, as existing dressings lack a mechanism for non-damaging removal while maintaining adhesion to prevent infection.
Innovation Solution
A two-layer wound dressing design featuring a skin contact layer with a lower adhesive and a removable cover layer with an upper adhesive of lower adhesion factor, allowing the cover layer to be easily removed without disturbing the skin contact layer, which remains adhered to the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wound dressing uses strong adhesive to maintain barrier function and prevent infection, then the adhesion strength is improved, but the skin damage upon removal worsens
Solution Approach 1:
The wound dressing is divided into two distinct layers: a skin contact layer with strong adhesive that remains on the skin, and a removable cover layer with weak adhesive that can be easily removed. This segmentation allows the strong adhesive to provide reliable infection barrier function while the weak adhesive cover layer enables pain-free removal, thus resolving the contradiction between adhesion strength and skin damage.
2Reliability
If a wound dressing uses strong adhesive to ensure secure attachment, then the reliability of the barrier function is improved, but the ease of removal worsens
Solution Approach 1:
The dressing is segmented into a permanent skin contact layer and a temporary removable cover layer. The skin contact layer maintains reliable barrier function through strong adhesive attachment, while the cover layer with weak adhesive allows easy removal for wound evaluation, thus resolving the contradiction between barrier reliability and ease of removal.
3Measurement precision
If frequent removal of wound dressing is performed for wound evaluation, then the measurement precision of wound status is improved, but the skin damage accumulates and worsens
Solution Approach 1:
By segmenting the dressing into a permanent skin contact layer and a removable cover layer, the system allows frequent removal and replacement of the cover layer for wound evaluation without repeatedly removing and reapplying adhesive to the skin. This eliminates cumulative skin damage while maintaining the ability to precisely evaluate wound status.
Solution Approach 2:
The removable cover layer acts as an intermediary between the wound and the external environment, allowing healthcare providers to evaluate the wound by removing only the cover layer while the skin contact layer remains in place. This intermediary approach enables accurate wound assessment without the harmful effects of repeated full dressing removal.
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 pain-free and damage-free removal of the wound dressing, facilitating wound evaluation and dressing changes without interfering with the healing process, while maintaining a barrier against infection.
Implementation Method 1
a lower adhesive disposed on the bottom surface of the lower substrate to adhere the skin contact layer to the skin of an individual
Implementation Method 2
An upper adhesive is positioned between the top surface of the lower substrate and a bottom surface of the backing layer of the cover layer. The upper adhesive has an adhesion factor that is less than an adhesion factor of the lower adhesive.
Data Source
AI summary
Wound dressings including a skin contact layer and a cover layer removably adhered to the top surface of the skin contact layer are described. The skin contact layer includes a lower substrate extending around a central aperture and a lower adhesive. The lower substrate includes a top surface and a bottom surface opposite the top surface. The lower adhesive is disposed on the bottom surface of the lower substrate. The cover layer substantially covers the central aperture of the lower substrate, and includes an upper substrate and a backing layer. An upper adhesive is positioned between the top surface of the lower substrate and a bottom surface of the backing layer. In embodiments, the cover layer can be removed and changed while the skin contact layer remains adhered to the skin around a wound.