Fenestrated Absorbent Pads for Conformable Wound Dressings
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Solution Overview
Problem
Absorbent pads in wound dressings are rigid and lack extensibility, making them difficult to apply to challenging anatomical areas, leading to premature detachment and increased dressing changes, which are time-consuming and costly.
Innovation Solution
Incorporating a pattern of fenestrations in the absorbent pad with symmetry about cardinal and intercardinal axes, allowing for multi-directional extensibility, conformability, and improved adherence to body contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If absorbent pads are made with laminate structure for high absorption capacity, then absorption performance is improved, but extensibility and conformability deteriorate
Solution Approach 1:
The absorbent pad is divided into multiple segments through fenestrations (cuts) that create independent movable sections. These segmented regions can expand and contract independently, allowing the rigid laminate structure to achieve overall extensibility while maintaining its absorption capacity through the distributed foam and fibrous layers.
Solution Approach 2:
Different regions of the absorbent pad have different properties - the foam layer provides rigidity and absorption in areas requiring structural support, while the fenestrated regions provide extensibility where conformability is needed. This local differentiation allows the pad to simultaneously achieve high absorption capacity and good extensibility.
2Strength
If absorbent pads are made rigid for structural integrity, then durability is improved, but ease of application to difficult anatomical areas deteriorates
Solution Approach 1:
The rigid laminate structure is segmented into multiple sections by fenestrations, creating a series of connected but independently movable regions. This segmentation allows the dressing to be applied to difficult anatomical areas by enabling the material to stretch and conform to complex body contours while maintaining overall structural integrity through the distributed rigid layers.
Solution Approach 2:
The fenestrations create a three-dimensional structure with vertical spacing between the foam and fibrous layers, allowing the pad to expand in the vertical dimension while maintaining horizontal extensibility. This dimensional change enables the rigid structure to adapt to curved and irregular anatomical surfaces.
3Quantity of substance
If wound dressings cannot conform to bodily movements, then absorption capacity is maintained, but reliability of adherence deteriorates
Solution Approach 1:
The absorbent pad transitions from a static rigid structure to a dynamic flexible structure through the fenestrated design. The segmented regions can dynamically adjust and move with bodily movements, maintaining continuous contact with the skin surface while preserving the absorption capacity of the foam and fibrous layers.
Solution Approach 2:
Different regions of the pad have different flexibility characteristics - areas with higher fenestration density provide greater conformability to moving body parts, while areas with lower fenestration density maintain more structural rigidity for absorption. This local quality differentiation enables simultaneous adherence and absorption.
Data Source
AI summary
The present invention concerns extensible absorbent pads for wound dressings. The absorbent pad has a plurality of fenestrations therein, wherein the fenestrations are arranged in a pattern about a central point. The pattern comprises one or more fenestrations having symmetry about a cardinal axis and one or more fenestrations having symmetry about an intercardinal axis, wherein the cardinal and intercardinal axes cross at the central point. The absorbent pads of the present invention can be used in advanced wound care dressing applications where additional stretch and extensibility of the dressing will assist clinicians in applying the dressing to difficult to dress anatomical areas.