Stomal Sensor Patch With Chamfered Edges for Adhesive Failure Detection
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Solution Overview
Problem
Existing ostomy appliances face issues with adhesive failure and leakage due to stomal output and skin moisture, leading to embarrassing and stigmatizing incidents, with current detection methods failing to provide timely warnings of impending failure.
Innovation Solution
A sensor patch with a chamfered edge is attached to the base plate, featuring a first adhesive sensor layer with a decreasing outer rim thickness and increasing inner rim thickness, facilitating a smooth transition and reducing the risk of adhesive failure by enhancing adhesion to the skin surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor patch is attached to the adhesive surface of the base plate, then detection capability of adhesive failure and leakage risk is improved, but the adhesion quality between the base plate and skin surface deteriorates due to the edge effect
Solution Approach 1:
The patent applies curvature by providing the sensor patch with a chamfered edge (beveled edge) instead of a sharp 90-degree corner. This curved/angled transition reduces the edge effect and creates a smoother surface profile, thereby improving adhesion quality while maintaining the sensor patch's detection functionality.
Solution Approach 2:
The patent modifies only the local edge region of the sensor patch by providing a chamfered edge, while the rest of the sensor patch maintains its original properties. This localized modification addresses the adhesion problem at the edge without affecting the overall sensor functionality or the central adhesion areas.
2Shape
If the outer rim thickness of the adhesive sensor layer is reduced, then the transition smoothness between base plate and sensor patch is improved, but the structural strength of the sensor patch deteriorates
Solution Approach 1:
The chamfered edge creates a gradual thickness transition from the center to the edge of the sensor patch, avoiding abrupt changes. This curved profile improves surface smoothness and adhesion while distributing mechanical stresses more evenly, thereby maintaining structural strength despite the reduced outer rim thickness.
Solution Approach 2:
The patent changes the geometric parameters of the adhesive sensor layer by defining a specific thickness profile that decreases from the center to the edge. This parameter modification optimizes both the transition smoothness and structural integrity by creating an intermediate thickness distribution.
Data Source
AI summary
Disclosed is a sensor patch for attachment to a base plate for an ostomy appliance, and a method for manufacturing such sensor patch. The sensor patch having a proximal side and a distal side. The distal side being adapted for attachment to an adhesive surface of the base plate, wherein the adhesive surface of the base plate is adapted for attachment of the base plate to the skin surface of a user. The sensor patch comprises: a sensor assembly comprising a plurality of electrodes, and a first adhesive sensor layer forming the proximal side of the sensor patch and being adapted for attachment of the sensor patch to the skin surface of the user. The first adhesive sensor layer comprises a first centre portion having a first centre thickness and a first outer rim portion surrounding the first centre portion. The first outer rim portion has a first outer rim thickness decreasing along a radial direction from adjacent the first centre portion to a first outer periphery of the first adhesive sensor layer.