Multilayered Bioresorbable Wound Dressing with Fluid Channels
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Solution Overview
Problem
Conventional wound dressings often adhere to the wound bed due to tissue ingress, making them difficult to remove and causing patient discomfort, and frequent changes can disrupt the wound bed and lead to discomfort.
Innovation Solution
A multi-layered wound dressing featuring bioresorbable sponges with fluid channels and collagen-based films that degrade over time, providing a spacing between the wound bed and secondary dressings, reducing adhesion and tissue ingress, and allowing for extended wear without the need for frequent changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If wound dressings are used for extended periods of time, then patient comfort and wound bed stability improve, but tissue ingress occurs causing adhesion and difficulty in removal
Solution Approach 1:
The wound dressing is divided into multiple functional layers: a primary contact layer with bioresorbable sponge and collagen film that interfaces with the wound bed, and a secondary layer that provides structural support. This segmentation allows the primary contact layer to degrade and be absorbed over time, eliminating adhesion issues upon removal while maintaining extended wear capability.
Solution Approach 2:
A collagen-based film is introduced as an intermediary layer between the bioresorbable sponge and the wound bed. This collagen film acts as a barrier that prevents tissue ingress into the sponge while allowing the sponge to provide spacing and absorb exudate, thereby maintaining ease of removal even after extended wear.
2Ease of operation
If wound dressings are replaced regularly to prevent tissue ingress, then adhesion and patient discomfort are reduced, but wound bed disruption and patient discomfort increase
Solution Approach 1:
The primary contact layer of the wound dressing is designed to be bioresorbable, meaning it automatically degrades and is absorbed by the body over time. This self-service mechanism eliminates the need for manual removal of the primary contact layer, thereby preventing wound bed disruption and patient discomfort associated with frequent dressing changes.
Solution Approach 2:
The dressing utilizes materials with different degradation rates: the bioresorbable sponge degrades over a longer period to maintain spacing, while the collagen film degrades more quickly to prevent adhesion. This parameter change in degradation timing allows the dressing to remain in place for extended periods without causing wound bed disruption.
3Device complexity
If a single-layer wound dressing is used, then device complexity is reduced, but ability to prevent tissue ingress and provide spacing is insufficient
Solution Approach 1:
The wound dressing is divided into multiple functional layers: a primary contact layer with bioresorbable sponge and collagen film that interfaces with the wound bed, and a secondary layer that provides structural support. This segmentation allows the primary contact layer to degrade and be absorbed over time, eliminating adhesion issues upon removal while maintaining extended wear capability.
Solution Approach 2:
The dressing combines different materials with complementary properties: bioresorbable sponge for spacing and exudate absorption, collagen-based film for preventing tissue ingress through its barrier function, and potentially non-bioresorbable components for structural integrity. This composite structure achieves reliable tissue ingress prevention while maintaining manageable complexity.
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 bioresorbable wound dressing minimizes tissue disruption and patient discomfort by allowing the dressing to be absorbed by the body over time, reducing adhesion and tissue ingress, and enabling extended wear without the need for frequent changes.
Implementation Method 1
The first bioresorbable sponge can be configured to degrade over a first predetermined amount of time
Implementation Method 2
The first plurality of fluid channels through the first bioresorbable sponge
Data Source
AI summary
The wound dressing described herein can be used as a contact layer dressing. The wound dressing can be positioned between a wound bed and a secondary dressing. The wound dressing can include a layered construction. Each of the layers can include a bioresorbable sponge enclosed within a collagen-based film. The wound dressing can include a plurality of fluid channels that enable fluid flow from the wound bed toward the environment-face side of the wound dressing.