Ostomy Wafer Radial Space Moisture Management
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Solution Overview
Problem
Existing ostomy wafer constructions face challenges with skin adhesive separation, leading to leakages and skin irritation, particularly in managing moisture evaporation and condensation, and fail to maintain skin respiration and adherence simultaneously.
Innovation Solution
A wafer construction with a central through-going aperture and radially extending layers, where the inner layer is moist vapour permeable and the outer layer is substantially impermeable, creating a radial space for moisture escape and maintaining skin adherence through attachment points, allowing for skin respiration while preventing odour migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a moisture impermeable adhesive layer is used to maintain skin adherence, then adhesive attachment is improved, but skin respiration and moisture evaporation are restricted
Solution Approach 1:
The adhesive layer is divided into multiple functional zones: a central zone with first adhesive properties for strong skin attachment, and an encircling zone with second adhesive properties that are more moisture-permeable. This segmentation allows different regions to serve different functions - the central zone maintains adherence while the encircling zone allows moisture evaporation to prevent skin irritation.
Solution Approach 2:
Different regions of the adhesive layer are assigned different properties. The central zone has higher adhesive strength for reliable attachment, while the encircling zone has higher moisture permeability to allow skin respiration. This local differentiation resolves the contradiction by making each area optimized for its specific function.
2Object-affected harmful factors
If a permeable layer is used to allow skin respiration, then moisture evaporation is improved, but adhesive power and skin attachment are reduced
Solution Approach 1:
The adhesive layer is segmented into a central zone and an encircling zone with different permeability characteristics. The encircling zone uses a more permeable adhesive formulation that allows moisture evaporation and skin respiration, while the central zone maintains stronger adhesive properties for reliable attachment. This segmentation enables both functions to coexist.
Solution Approach 2:
The adhesive layer exhibits local quality variations where the encircling zone is designed with higher moisture permeability to facilitate skin respiration, while the central zone maintains higher adhesive strength. This local differentiation allows the system to simultaneously achieve both skin respiration and reliable attachment without compromising either function.
3Object-affected harmful factors
If adhesive zones with different properties are used to balance adherence and respiration, then both skin attachment and moisture evaporation are improved, but device complexity increases
Solution Approach 1:
Multiple adhesive zones with different properties are merged into a single integrated adhesive layer structure. The central zone and encircling zone are combined in one continuous layer, eliminating the need for separate components or complex assembly. This merging reduces device complexity while maintaining the functional benefits of differentiated adhesive properties.
Solution Approach 2:
The adhesive layer serves multiple functions simultaneously: it provides skin attachment through its adhesive properties, allows moisture evaporation through the permeable encircling zone, and prevents skin irritation. By making the adhesive layer multi-functional, the design avoids the need for additional separate components, thereby reducing overall device 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 solution effectively reduces skin irritation, maintains adhesive attachment, and allows for efficient moisture management, improving comfort and hygiene for active users with increased perspiration.
Implementation Method 1
an inner radially extending layer (220) for attaching the wafer to the peri-stomal skin (002); said inner layer (220) comprising: a moist vapour permeable layer (224)
Implementation Method 2
an outer radially extending layer (230); said outer layer comprising: a substantially moist vapour impermeable film (232)
Implementation Method 3
at least one radial space (270) in fluid communication with the atmosphere (500); said radial space (270) being located between the outer surface of the inner layer (226) and the inner surface of the outer layer (238)
Data Source
AI summary
A wafer construction (200) for applying a collecting system (100) around an ostomy, the wafer construction comprising a central through-going aperture (201) for bringing the ostomy (001) in fluid communication with a collecting reservoir (300), an inner radially extending layer (220) for attaching the wafer to the peri-stomal skin (002), said inner layer (220) comprising a skin contacting surface (221), a moist vapour permeable layer (224), an outer surface (226); an outer radially extending layer (230); said outer layer comprising a substantially moist vapour impermeable film (232), an outer surface (236), an inner surface (238), a bag element (234) for engaging the wafer (200) to a collecting reservoir (300); a central stoma adjacent-area (240) comprising a first area of both the inner layer (220) and the outer layer (230); said central stoma-adjacent-area defined radially as the area of the wafer construction (200) closer to the central through-going aperture (201) than the bag element (234) of the outer layer; an encircling area (250) comprising a second area of at least the inner layer (220); at least one radial space (270) in fluid communication with the atmosphere (500); said radial space (270) being located between the outer surface of the inner layer (226) and the inner surface of the outer layer (238); and at least one attachment point (260); said attachment point attaching the outer layer (230) to the inner layer (220); wherein at least a portion of the radial space (270) is located in the central stoma-adjacent-area (240).