Continuous Potassium Sensor Using Enzyme-Responsive Electrodes
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Solution Overview
Problem
There is a need for in vivo sensors capable of detecting potassium levels, as current technologies do not provide continuous monitoring of this analyte, which is crucial for managing conditions like kidney or heart diseases, and existing implanted sensors are not available for potassium detection.
Innovation Solution
The development of an analyte sensor with multiple working electrodes, each equipped with distinct aspartate oxidases and asparaginases, utilizing mass transport limiting membranes and electron transfer agents, to facilitate continuous potassium monitoring in vivo.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If periodic ex vivo analyte monitoring is used, then the monitoring process is simple and non-invasive, but continuous data cannot be obtained and lost data cannot be recovered
Solution Approach 1:
The patent replaces the mechanical/ex vivo sampling system with an in vivo electrochemical sensing system. The sensor uses electron transfer agents and enzymes to detect analytes continuously within the body, substituting periodic external sampling with continuous internal monitoring, thereby preventing data loss while maintaining operational simplicity through automated sensing.
Solution Approach 2:
The patent introduces electron transfer agents as intermediaries between the analyte and the electrode. These agents facilitate continuous electron transfer reactions that enable ongoing analyte detection without requiring periodic sampling, thus maintaining data continuity while keeping the system simple to operate.
2Loss of information
If in vivo implanted sensors are used, then continuous analyte monitoring is achieved, but the sensor materials must be highly biocompatible and stable for extended periods
Solution Approach 1:
The patent employs composite material structures combining biocompatible polymers, enzymes, and electron transfer agents. This composite approach allows the sensor to maintain high biocompatibility for extended implantation while ensuring stability through the synergistic combination of materials that resist degradation and maintain sensing function over time.
Solution Approach 2:
The patent optimizes physical and chemical parameters of the sensor materials, including pore size, cross-linking density, and enzyme immobilization methods, to enhance both biocompatibility and stability. By carefully controlling these parameters, the sensor achieves extended operational stability while maintaining compatibility with biological systems.
3Loss of information
If enzyme-based amperometric sensors are used for glucose monitoring, then continuous monitoring is achieved, but no suitable sensors exist for potassium detection
Solution Approach 1:
The patent develops a universal sensing platform based on electron transfer agents and enzyme systems that can detect multiple analytes including both glucose and potassium. This multi-functional approach allows the same basic sensor architecture to be adapted for different analyte detections, thereby expanding the detection range while maintaining continuous monitoring capability.
Solution Approach 2:
The patent modifies the enzymatic parameters and electron transfer agents used in the sensor system to enable potassium detection specifically. By changing the enzyme selectivity and electrochemical parameters, the sensor is adapted from glucose-specific detection to potassium detection, thereby expanding analyte versatility while preserving continuous monitoring functionality.
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
Enables accurate and continuous monitoring of potassium levels, providing essential health data for individuals at risk of neurological conditions or diabetes, with the sensor being biocompatible and stable for extended wear.
Implementation Method 1
the first analyte-responsive active area comprises a first aspartate oxidase
Implementation Method 2
a first aspartate oxidase
Implementation Method 3
a first mass transport limiting membrane permeable to potassium
Implementation Method 4
utilizing mass transport limiting membranes and electron transfer agents
Data Source
AI summary
The present disclosure provides an analyte sensor for use in detecting potassium. In certain embodiments, an analyte sensor of the present disclosure includes at least two asparagine-responsive active areas, where each asparagine-responsive active area includes an asparaginase that exhibits a particular potassium dependency. In certain embodiments, an analyte sensor of the present disclosure includes at least two aspartate-responsive active areas, where each aspartate-responsive active area includes an aspartate oxidase that exhibits a particular potassium dependency. The present disclosure further provides methods for monitoring potassium levels, e.g., in vivo potassium levels, using the disclosed analyte sensors.