Ostomy Stomal Sensor Patch With Chamfered Edge for Leak 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 reliable 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, reducing the transition edge and enhancing adhesion, along with electrodes for moisture and adherence detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor patch is attached to the adhesive surface of the base plate, then the detection of adhesive failure and leakage risks is improved, but the adhesion quality between the base plate and skin surface deteriorates due to the edge effect
Solution Approach 1:
The sensor patch is designed with a chamfered edge featuring a decreasing outer rim thickness, creating a smooth curved transition rather than a sharp angle. This curvature eliminates the edge effect that causes adhesive failure, allowing the sensor patch to be attached to the base plate without compromising adhesion quality while maintaining detection precision
2Ease of manufacture
If the outer rim thickness of the adhesive sensor layer is uniform, then the manufacturing process is simpler, but the transition edge between base plate and sensor patch creates adhesion failure
Solution Approach 1:
The adhesive sensor layer is designed with spatially varying thickness: the outer rim portion has a decreasing thickness from the center toward the periphery, creating a chamfered edge. This local variation in geometry addresses the specific adhesion problem at the edge region while maintaining uniformity in other areas, balancing manufacturing complexity with adhesion reliability
3Quantity of substance
If hydrocolloid materials are added to the base plate adhesive, then the moisture absorption capability is improved, but the adhesive material becomes more complex
Solution Approach 1:
The adhesive sensor layer serves multiple functions simultaneously: it provides moisture absorption through hydrocolloid materials, enables electrical conduction for sensor operation, and creates the chamfered edge geometry for improved adhesion. By combining these functions in a single layer, the overall device complexity is reduced despite the enhanced moisture absorption capability
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 sensor patch improves the detection of adhesive failure and leakage risks, ensuring better adhesion to the skin and reducing the occurrence of sudden leaks by providing timely warnings.
Implementation Method 1
adhesives of base plates for ostomy devices include hydrocolloid materials which are capable of absorbing high levels of moisture, thereby stabilizing the polymer matrix of the adhesive material and prolonging the lifetime ('wear time') of the base plate
Implementation Method 2
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, reducing the transition edge and enhancing adhesion, along with electrodes for moisture and adherence detection
Data Source
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AI summary
Disclosed is a sensor patch for attachment to a base plate for an ostomy appliance. 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. 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 is adapted to form a stomal opening with a centre point, the stomal opening being configured to allow passage of output through the stomal opening and into an ostomy pouch attached to the base plate. The sensor patch comprises: a sensor assembly comprising a plurality of electrodes including a first electrode and a second electrode for forming a first sensor, 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 chamfered edge providing a smooth transition between the adhesive surface of a base plate and the sensor patch attached thereto.