Sensor Adhesive Segmentation for Reattachment and Breathability
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Solution Overview
Problem
Existing medical monitoring sensors face challenges with adhesive strength loss due to skin irritation, patient movement, and moisture accumulation, leading to discomfort and reduced accuracy.
Innovation Solution
The sensor design incorporates a body with multiple adhesive regions, including a first bandage with a first type of adhesive for self-attachment and re-attachment, and a second bandage with a second type of adhesive for patient adherence, along with a porous backing for breathability and tear protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single adhesive is used for sensor application, then initial adhesion is achieved, but adhesive strength is lost after removal due to skin irritation, moisture, and movement
Solution Approach 1:
The adhesive system is divided into two separate bandages, each with its own adhesive type. The first bandage provides initial secure attachment, while the second bandage enables reapplication after removal. This segmentation allows each adhesive to be optimized for its specific function, resolving the contradiction between initial adhesion strength and reusability.
Solution Approach 2:
Different adhesive parameters (chemical composition, tackiness, flexibility) are used in the two bandages to suit different functional requirements. The first adhesive is optimized for strong initial bonding, while the second adhesive is optimized for gentle reapplication, changing the adhesive parameters to resolve the contradiction.
2Reliability
If adhesive is applied continuously to skin, then sensor remains attached, but skin irritation and moisture accumulation occur reducing comfort
Solution Approach 1:
The continuous adhesive contact is segmented into two separate adhesive regions. The first bandage provides initial attachment, then the sensor can be removed and reapplied using the second bandage. This segmentation reduces continuous skin exposure to a single adhesive, minimizing irritation and moisture accumulation while maintaining attachment reliability.
Solution Approach 2:
The porous backing material acts as an intermediary between the adhesive and the skin, allowing breathability and reducing moisture accumulation. This intermediary layer maintains sensor attachment while mitigating the harmful effects of continuous adhesive contact.
3Ease of operation
If sensor is removed and reapplied multiple times, then flexibility is improved, but adhesive strength is lost leading to reduced accuracy
Solution Approach 1:
The adhesive system is segmented into two bandages, allowing the sensor to be removed and reapplied using the second bandage while the first bandage remains intact. This segmentation preserves adhesive strength for accurate measurements even after multiple removals and reapplications, while maintaining ease of repositioning.
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
This design enhances comfort, breathability, and repositionability of the sensor while maintaining adhesive strength, even after multiple removals and reapplications, thereby improving measurement accuracy.
Implementation Method 1
a porous backing for breathability
Implementation Method 2
a first bandage including a respective surface with a first type of adhesive and a second bandage coupled to a portion of the first bandage and including a respective surface with a second type of adhesive
Data Source
AI summary
A sensor includes a light-emitting diode (LED), a detector to detect light emitted by the LED, and a body that supports the LED and the detector. The body includes a first bandage including a respective surface with a first type of adhesive and a second bandage coupled to a portion of the first bandage and including a respective surface with a second type of adhesive.