Wound Dressing Adhesive Border and Superabsorbent Core
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Solution Overview
Problem
Existing wound dressings face challenges with adhesives that cause trauma during removal, poor breathability leading to increased healing time, and reduced absorbency due to silicone adhesives, as well as issues with superabsorbent materials that can be uncomfortable and prone to swelling, which affects their effectiveness and comfort.
Innovation Solution
A wound dressing design featuring a semi-self adhering adhesive border, a superabsorbent material configuration between a wound contact portion and a foam layer, and a liquid impervious backing layer, with a cushion layer for comfort and high moisture vapor transmission rate, minimizing trauma and maximizing absorbency and breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If silicone adhesive is applied continuously to secure the dressing, then adhesion strength is improved, but moisture vapor transmission rate deteriorates
Solution Approach 1:
The adhesive is applied in discontinuous patterns (islands, borders, or selective areas) rather than as a continuous layer. This segmentation allows moisture vapor to pass through non-adhesive areas while maintaining sufficient attachment strength at the adhesive locations.
Solution Approach 2:
Different regions of the dressing have different adhesive properties. The adhesive is strategically placed in specific locations (borders, corners, or selective zones) rather than uniformly across the entire surface, creating local variations in both adhesion and breathability.
2Strength
If silicone adhesive is applied to the wound contact portion, then adhesion is improved, but absorbency rate deteriorates
Solution Approach 1:
The adhesive application is segmented to exclude the central wound contact area or reduce adhesive coverage in high-absorbency zones, allowing the absorbent material to perform optimally while still providing attachment at the periphery.
Solution Approach 2:
The adhesive is applied with varying density or absence across different regions of the dressing, with reduced or no adhesive in the wound contact portion to maximize absorbency, and increased adhesive at borders for securement.
3Quantity of substance
If superabsorbent material is used to increase fluid retention, then absorbency is improved, but user comfort deteriorates
Solution Approach 1:
The dressing combines superabsorbent particles with a foam matrix or carrier material. This composite structure provides the high fluid retention of superabsorbent material while the foam provides a softer, more comfortable interface with the skin.
Solution Approach 2:
A foam layer or barrier material is introduced between the superabsorbent material and the skin to mediate the interaction, preventing direct contact with the coarse superabsorbent particles while still allowing fluid absorption to occur.
4Duration of action of stationary object
If adhesive strength is increased to secure the dressing for extended periods, then duration of action is improved, but trauma during removal worsens
Solution Approach 1:
The adhesive properties are made dynamic or gradient-based, with different adhesive strengths in different regions. Border areas have stronger adhesion for securement, while areas near the wound or skin contact zones have reduced adhesion to minimize trauma during 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
The solution provides a comfortable, non-traumatizing dressing with high absorbency and breathability, reducing healing time and the risk of infection while maintaining structural integrity when wet, promoting accelerated healing and improved user comfort.
Implementation Method 1
superabsorbent material, which can increase the amount of fluid retainable by the dressing
Implementation Method 2
superabsorbent particles, tend to swell exuberantly, in particular the superabsorbent particles loosen from the carrier as they fill with exudates
Implementation Method 3
high moisture vapor transmission rate
Implementation Method 4
moisture vapor transmission rate (MVTR) of the dressing
Implementation Method 5
adhesive to secure the dressing to the wound. The adhesive portion allows the absorbent material to stay substantially in contact with the wound by adhering to the region of the body surrounding the wound
Data Source
AI summary
A composite wound dressing includes an absorbent portion coupled to the vapor permeable backing with a first adhesive and a wound contact portion having a first portion coupled to the absorbent portion with a second adhesive, and the wound contact portion having a second portion coupled to the vapor permeable backing with the first adhesive is disclosed. Further a skin securement portion coupled to the backing portion with the first adhesive, the skin securement portion including a semi-self adherent adhesive, and a void having a first size, wherein at least a portion of absorbent is accessible through the void. The wound contact portion has a size greater than the first size of the void.