Ostomy Adhesive Wafer with Neutralizer Matrix for Skin Protection
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Solution Overview
Problem
Existing ostomy appliances fail to effectively neutralize the aggressive components in stoma output, leading to skin maceration and adhesive degradation, particularly due to peristaltic movements and intermittent output flow.
Innovation Solution
An adhesive wafer with a release layer containing a neutralizer matrix on the distal side, which releases a neutralizing substance to neutralize harmful components of stoma output before they come into contact with the skin or adhesive, using materials like organophilic clay or potato-derived inhibitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional adhesive wafer without neutralizer is used, then the structure is simple and manufacturing is easy, but the adhesive degrades and skin macerates due to aggressive stoma output
Solution Approach 1:
The wafer is divided into distinct functional zones: a central portion with the adhesive layer for skin attachment, and a peripheral portion with the neutralizer matrix for chemical protection. This segmentation allows each zone to perform its specific function optimally without interfering with the other, resolving the contradiction between maintaining adhesive integrity and managing structural complexity.
Solution Approach 2:
The neutralizer matrix acts as an intermediary substance between the aggressive stoma output and the adhesive layer/skin. It chemically neutralizes harmful components (enzymes, acids, bases) before they can degrade the adhesive or macerate the skin, thereby protecting the adhesive integrity without requiring fundamental changes to the wafer structure.
2Object-affected harmful factors
If the release layer covers the entire distal surface, then protection is maximized, but material consumption and manufacturing complexity increase
Solution Approach 1:
The release layer covering the neutralizer matrix is applied selectively only to the peripheral portion of the wafer's distal surface, not the entire surface. This localized application concentrates the neutralizer exactly where stoma output contacts the wafer first, maximizing protective effect while minimizing neutralizer material consumption and simplifying manufacturing processes.
3Reliability
If the neutralizer is released continuously, then protection is constant, but the neutralizer depletes quickly and material is wasted
Solution Approach 1:
The neutralizer release occurs periodically rather than continuously - it activates when stoma output contacts the release layer, neutralizes the harmful components, and then enters a dormant state until the next exposure. This periodic action maintains reliable protection during critical moments while conserving neutralizer material during periods when output is not present.
Solution Approach 2:
The neutralizer release mechanism is self-regulating and responds automatically to the presence of stoma output. The release layer detects contact with output and triggers neutralizer release only when needed, eliminating the need for external control systems and preventing unnecessary neutralizer depletion while maintaining protection reliability.
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 release layer effectively neutralizes harmful components, reducing skin irritation and adhesive degradation, maintaining the integrity of the ostomy appliance and user comfort.
Implementation Method 1
a release layer configured to releasing a neutralizer on the distal side of the backing layer wherein at least a part of the distal surface of the central portion is provided with a release layer
Data Source
Figure 1~2
Figure 3a~3c
Figure 3d
AI summary
An adhesive wafer (10) for an ostomy device, the wafer comprising a skin-facing adhesive layer (40), a backing layer (30) on the non-skin-facing side of the adhesive layer, and a hole (60) for accommodating a stoma. On the central portion of the backing layer is located a release layer (110) being configured to release a neutralizer. The neutralizer is capable of neutralizing or at least minimizing the level of skin or adhesive aggressiveness of the output.