Analyte Sensor Pre-Hydration and Biasing for Faster Break-In
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Solution Overview
Problem
Existing analyte sensors, such as continuous glucose monitors, experience a non-linear response during the break-in period due to electrochemical and membrane hydration processes, making it difficult to obtain accurate analyte concentration measurements during this time.
Innovation Solution
The analyte sensor system mitigates break-in by pre-hydrating the membrane and applying a bias potential before insertion, using a self-powered battery for immediate bias application, and accelerating break-in with heat or pulsed overpotential bias, while compensating for non-linear responses through modeling and user interface confidence indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the analyte sensor is inserted immediately without pre-hydration, then the device complexity is reduced, but the break-in time increases and measurement precision deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-hydrating the membrane and applying bias potential to the analyte sensor before insertion into the patient. This is achieved through a hydration chamber that maintains the sensor in a hydrated state during storage and transport, and a bias potential application mechanism that activates the electrochemical reactions before the sensor enters the body. This preliminary preparation eliminates the break-in period and ensures accurate measurements from the first use, directly resolving the contradiction between measurement precision and device complexity.
2Measurement precision
If pre-hydration and bias potential application are implemented, then measurement precision improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges multiple functions into integrated components to ease manufacturing. The hydration chamber is integrated into the sensor assembly, combining storage and hydration functions. The bias potential application mechanism is merged with the sensor electrodes, eliminating separate power supply components. This integration reduces the number of discrete parts and assembly steps while maintaining the sophisticated functionality needed for accurate measurements, thereby resolving the contradiction between measurement precision and ease of manufacture.
3Measurement precision
If break-in time is extended to allow accurate measurements, then measurement precision improves, but loss of time increases
Solution Approach 1:
The patent performs the break-in process in advance through pre-hydration of the membrane and application of bias potential before sensor insertion. The hydration chamber maintains optimal membrane hydration during storage, and the bias potential application mechanism completes the electrochemical stabilization process before the sensor enters the patient's body. This shifts the time-consuming break-in process from the patient use period to the manufacturing/storage period, eliminating the break-in delay during actual measurement and resolving the contradiction between measurement precision and loss of time.
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 approach reduces the break-in time and enables quicker generation of accurate analyte concentration values by minimizing membrane and electrochemical delays, providing immediate and reliable sensor readings post-insertion.
Implementation Method 1
the analyte sensor is exposed to analyte, an electrochemical reaction between the analyte sensor and the analyte causes the analyte sensor to generate a raw sensor signal
Implementation Method 2
accelerating break-in with heat or pulsed overpotential bias
Implementation Method 3
pre-hydrating the membrane and applying a bias potential before insertion
Data Source
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AI summary
Various examples described herein are directed to systems, apparatuses, and methods for mitigating break-in in an analyte sensor. An example analyte sensor system comprises an analyte sensor applicator comprising a needle; an analyte sensor comprising at least a working electrode and a reference electrode, the analyte sensor positioned at least partially within a lumen of the needle; and a hydrating agent positioned within the lumen of the needle to at least partially hydrate the needle.