Dual Lactate Sensor Variance Detection
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Solution Overview
Problem
Current implantable sensors for continuous analyte monitoring, such as lactate sensors, often experience inaccuracies due to factors like insertion trauma, bleeding, and signal variation during wear, leading to early and late signal variations.
Innovation Solution
The development of an analyte-responsive sensor with two analyte-responsive sensing areas (channels) that detect the same analyte, allowing for independent signal production and variance detection to provide accurate analyte concentration data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-channel sensor is used for continuous analyte monitoring, then the device complexity is low, but measurement precision deteriorates due to inaccuracies from insertion trauma, bleeding, and signal variation
Solution Approach 1:
The sensor is divided into multiple independent sensing areas (first sensing area and second sensing area) on separate working electrodes, each capable of independently detecting analyte concentration. This segmentation allows the system to compare signals from different locations and identify anomalies caused by insertion trauma or signal variation, thereby improving measurement precision without requiring a completely complex system architecture.
Solution Approach 2:
The system continuously monitors signals from multiple sensing areas and uses feedback mechanisms to detect variance between channels. When signal variation is detected (such as early signal variation or late signal variation), the system can identify whether the variation is due to anatomical changes, insertion trauma, or actual analyte concentration changes, and adjust measurements accordingly to maintain precision.
2Manufacturing precision
If a single sensing area is used, then the manufacturing precision is simple, but reliability deteriorates due to early and late signal variation during wear
Solution Approach 1:
Multiple sensing areas are fabricated on separate working electrodes within the same sensor device. Each sensing area can be independently optimized and fabricated with high precision, while the presence of multiple areas provides redundancy that improves reliability during wear by allowing comparison of signals over time to detect degradation or anatomical changes.
Solution Approach 2:
The sensor is designed with multiple sensing areas from the beginning, allowing preliminary detection of signal characteristics during the wear period. By establishing baseline signals from multiple locations at insertion, the system can later detect deviations that indicate early signal variation or late signal variation, enabling proactive adjustment or alerting before inaccurate measurements are reported.
3Device complexity
If only one signal channel is used, then the device complexity is minimal, but loss of information increases due to inability to detect variance from insertion trauma or movement
Solution Approach 1:
The sensing system is segmented into multiple independent channels (first channel and second channel), each monitoring analyte concentration at different locations. This segmentation enables the system to detect variance between channels that may indicate insertion trauma, sensor movement, or anatomical changes, thereby preventing loss of information about the true analyte concentration.
Solution Approach 2:
The system uses the variance between multiple signal channels as an intermediary indicator to detect non-analyte-related factors such as insertion trauma or sensor movement. By treating the difference between channels as a diagnostic signal, the system can filter out false information and maintain accurate analyte concentration data even in the presence of complicating factors.
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 dual-channel sensor system enables continuous, accurate monitoring of lactate levels by minimizing inaccuracies associated with early and late signal variations, thereby providing reliable real-time data.
Implementation Method 1
a membrane that is permeable to the analyte overcoating the first and second analyte-responsive sensing areas
Implementation Method 2
the first and second analyte-responsive sensing areas are configured to independently produce first and second signals indicative of analyte concentrations measured at the first and second working electrodes
Data Source
AI summary
The present disclosure describes lactate-responsive sensors having first and second lactate-responsive sensing areas, sensing systems incorporating the lactate-responsive sensor, and methods of using the same that for continuously monitoring lactate levels and determining variance between lactate concentrations derived from signals independently obtained from the first and second lactate-responsive areas.