Multi-layered Wound Dressing Shrinkage Reduction
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Solution Overview
Problem
Existing wound dressings often experience shrinkage and wrinkling due to packaging and sterilization methods, leading to inconsistent appearance and reduced shelf life, making it difficult to determine their suitability for use.
Innovation Solution
A multi-layered wound dressing with a fibrous absorbent layer and a support layer configured to reduce shrinkage, featuring a net structure with geometric apertures and a bonding layer to provide mechanical strength and prevent wrinkling, while maintaining gas and vapor permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional packaging and sterilization methods are used, then the wound dressing can be manufactured and stored, but shrinkage and wrinkling occur leading to inconsistent appearance and reduced shelf life
Solution Approach 1:
The support layer is incorporated into the wound dressing structure before sterilization and packaging. This preliminary structural reinforcement prevents shrinkage and wrinkling from occurring during subsequent sterilization processes and storage periods, maintaining appearance consistency throughout the extended shelf life
Solution Approach 2:
The wound dressing combines a fibrous absorbent layer with a support layer made of shrink-resistant material. This composite structure leverages the complementary properties of both materials: the absorbent layer provides wound care functionality while the support layer provides dimensional stability and shrink resistance during storage and sterilization
2Reliability
If the liquid-impermeable top layer is made to prevent leakage, then wound exudate containment is improved, but the layer becomes susceptible to wrinkling and shrinking
Solution Approach 1:
The support layer acts as an intermediary between the liquid-impermeable top layer and the fibrous absorbent layer. It provides structural support to the top layer, preventing it from wrinkling or shrinking while maintaining its liquid-impermeable barrier function for reliable exudate containment
Solution Approach 2:
The support layer is strategically positioned to provide localized reinforcement where needed. It offers dimensional stability and shrink resistance specifically to the liquid-impermeable top layer without compromising the absorbency or other functional properties of the fibrous absorbent layer
3Reliability
If the wound dressing is sterilized using extreme methods, then sterility is achieved, but shrinkage and wrinkling are exacerbated
Solution Approach 1:
The support layer provides beforehand cushioning against the harmful effects of extreme sterilization methods. It acts as a protective framework that absorbs and distributes the thermal or mechanical stress during sterilization, preventing excessive shrinkage and wrinkling while still allowing the dressing to achieve sterility
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 effectively prevents or reduces wrinkling and shrinkage of the wound dressing, ensuring consistency and extended shelf life, thereby maintaining the dressing's aesthetic appeal and usability.
Implementation Method 1
a fibrous absorbent layer for absorbing exudate from a wound site
Implementation Method 2
a support layer configured to reduce shrinkage of at least a portion of the wound dressing
Implementation Method 3
a bonding layer to provide mechanical strength
Data Source
Figure 1~2
Figure 3A~3B
Figure 4
AI summary
A multi-layered wound dressing including a fibrous absorbent layer for absorbing exudate from a wound site. The wound dressing also includes a support layer configured to reduce shrinkage of at least a portion of the wound dressing.