Intracorporeal Sensor Layering for Fluorescence Stability
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Solution Overview
Problem
Conventional embedded-in-body type sensors for continuous blood sugar measurement face challenges such as short durability and low accuracy due to deterioration of the fluorescent indicator substance and interference from living body components.
Innovation Solution
An intracorporeal substance measuring assembly with a detection layer containing a fluorescent indicator and an optically opaque optical separation layer that prevents direct contact with the analyte, allowing stable measurement over time while preventing light leakage and interference from living body substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the fluorescent indicator is directly exposed to the analyte in conventional embedded sensors, then the measurement response is immediate, but the fluorescent indicator deteriorates rapidly and measurement accuracy decreases
Solution Approach 1:
The sensor is divided into distinct functional layers: a detection layer containing the fluorescent indicator and an optical separation layer. This segmentation allows the detection layer to be protected from direct contact with the analyte while maintaining measurement capability through optical interaction.
Solution Approach 2:
The optical separation layer acts as an intermediary between the analyte and the fluorescent indicator. It permits analyte penetration for detection while simultaneously protecting the indicator from deterioration-causing substances in the living body environment.
2Reliability
If the detection layer is protected from direct contact with the analyte, then the fluorescent indicator durability is improved, but light leakage and interference from living body components may occur
Solution Approach 1:
The optical separation layer is designed with specific local properties: it is optically opaque to block harmful light and interference from living body components, yet it is permeable to the analyte molecules. This localized quality differentiation resolves the contradiction between protection and detection.
Solution Approach 2:
The optical separation layer exhibits selective optical properties - it is opaque to certain wavelengths of light that cause interference or damage, while remaining transparent to the analyte molecules and allowing optical interaction with the fluorescent indicator at specific wavelengths.
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 enables stable, long-term measurement of intracorporeal analytes by protecting the detection layer from deterioration and minimizing interference, ensuring accurate and continuous monitoring.
Implementation Method 1
a detection layer containing at least one fluorescent indicator for generating fluorescence according to the concentration of the analyte
Implementation Method 2
an optical separation layer being provided on one side of the detection layer, being optically opaque, and permitting the analyte to penetrate therethrough
Data Source
AI summary
An intracorporeal substance measuring assembly to be provided in an embedded-type substance sensor for detecting and measuring an intercorporeal analyte includes: a detection layer containing at least one fluorescent indicator for generating fluorescence according to the concentration of the analyte; and an optical separation layer which is provided on the detection layer, is optically opaque, permits the analyte to penetrate therethrough, and prevents the penetration therethrough of at least one of living body substances possibly deteriorating the detection layer and/or obstructing the fluorescence.