Dual-Electrode Analyte Sensor Signal Isolation
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Solution Overview
Problem
Conventional methods for monitoring blood glucose levels in diabetic patients are invasive, inconvenient, and often fail to detect hyperglycemic or hypoglycemic conditions in a timely manner, leading to dangerous side effects due to the lack of continuous and accurate glucose monitoring.
Innovation Solution
A dual-electrode continuous analyte sensor system is applied to a host, featuring a first working electrode beneath an enzymatic membrane portion and a second working electrode beneath a non-enzymatic membrane portion, which processes signals to isolate analyte-related signals from non-analyte related electroactive compounds using a scaling factor, allowing for continuous and accurate glucose monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single point blood glucose meter is used for testing, then the device simplicity is maintained, but the measurement frequency and reliability of glucose monitoring deteriorates
Solution Approach 1:
The patent implements continuous glucose monitoring by maintaining a sensor in the bloodstream that continuously measures glucose levels, eliminating the need for repeated discrete measurements. The sensor provides uninterrupted data flow, ensuring reliable detection of hyperglycemic and hypoglycemic events at all times.
Solution Approach 2:
The patent replaces mechanical finger-pricking methods with an electrochemical sensor system that uses enzymatic reactions and electrical signal detection. This substitution eliminates the need for physical blood sampling while providing continuous, reliable glucose measurements through electrochemical detection mechanisms.
2Ease of operation
If conventional electrochemical sensors are used, then the ease of operation is maintained, but the measurement precision deteriorates due to interference from non-analyte related electroactive compounds
Solution Approach 1:
The patent divides the sensing function into two separate working electrodes: one optimized for detecting the analyte (glucose) and another for detecting interfering electroactive compounds. This segmentation allows independent optimization of each electrode's detection capabilities and enables computational differentiation of analyte signals from interference signals.
Solution Approach 2:
The patent introduces a computational processing system that acts as an intermediary between the raw sensor signals and the final glucose measurement. This intermediary processes signals from both working electrodes, applies algorithms to distinguish analyte-related signals from non-analyte related electroactive compounds, and produces corrected glucose concentration values.
3Reliability
If continuous monitoring is implemented, then the reliability of glucose monitoring is improved, but the device complexity increases due to dual-electrode configuration and signal processing requirements
Solution Approach 1:
The patent designs the sensor system with multi-functionality, where the same sensor platform performs both analyte detection and interference detection simultaneously. The dual-electrode configuration allows the system to execute multiple detection functions without requiring separate devices, and the signal processing system handles multiple signal types through a unified computational framework.
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 system provides continuous, accurate monitoring of blood glucose levels, reducing the risk of undetected hyperglycemic or hypoglycemic events and enabling more informed insulin therapy decisions.
Implementation Method 1
an enzyme is provided that reacts with the analyte to be measured, and the byproduct of the reaction is qualified or quantified at the electrode
Implementation Method 2
quantified by amperometric measurement (for example, change in electrical current) through a polarized electrode
Implementation Method 3
an analyte (or a species derived from it) that is electro-active generates a detectable signal at an electrode
Data Source
AI summary
Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host's circulatory system.