ROS-Quenching Membrane for Glucose Sensor Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing glucose sensors face interference from reactive oxygen species (ROS) such as hydrogen peroxide, which can oxidize analytes like glucose, leading to inaccurate readings, especially in conditions of oxidative stress like ischemic events or diseases like atherosclerosis.
Innovation Solution
Incorporating a ROS-quenching agent into the sensor's membrane, which is designed to selectively quench ROS while allowing analytes to pass through, thereby minimizing interference and maintaining accurate glucose detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ROS-quenching agent is included in the sensor to eliminate interferent effects, then sensor reliability is improved, but analyte oxidation occurs leading to measurement precision deterioration
Solution Approach 1:
A barrier layer is introduced as an intermediary component between the sample and the sensing region. This barrier layer selectively quenches ROS while allowing analytes to pass through, thereby protecting the sensor chemistry from ROS interference without causing analyte depletion. The barrier layer acts as a mediator that filters harmful ROS molecules while permitting glucose and other analytes to reach the sensing region intact.
Solution Approach 2:
The ROS-quenching agent is localized specifically within the barrier layer rather than being distributed throughout the entire sensor. This localized placement ensures that ROS are quenched at the interface where they enter the sensor, while the sensing region maintains its original chemistry unchanged. The local quality approach allows different regions of the sensor to have specialized functions: the barrier layer handles ROS quenching while the sensing region handles analyte detection.
2Object-affected harmful factors
If the membrane selectively quenches ROS over analyte, then ROS interference is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The selective quenching capability is achieved by adjusting parameters of the barrier layer including pore size, porosity, and the concentration and type of ROS-quenching agent incorporated. By optimizing these parameters, the membrane can be tuned to selectively remove ROS while permitting analytes of specific sizes and properties to pass through. The parameter changes approach allows customization of the barrier layer for different analyte and ROS combinations.
Solution Approach 2:
The barrier layer is constructed as a composite material combining a porous membrane matrix with incorporated ROS-quenching agents. This composite structure integrates the physical filtering capability of the porous membrane with the chemical quenching capability of the ROS-quenching agent. The composite material approach enables simultaneous size-based selection and chemical-based quenching, enhancing selectivity while managing manufacturing complexity.
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 ROS-quenching membrane effectively reduces hydrogen peroxide concentrations and prevents significant analyte depletion, ensuring reliable glucose monitoring even under oxidative stress conditions.
Implementation Method 1
a barrier layer including a reactive oxygen species (ROS)-quenching, analyte-permeable membrane having an ROS-quenching agent adsorbed thereto
Implementation Method 2
a reactive oxygen species (ROS)-quenching, analyte-permeable membrane
Implementation Method 3
contacting a barrier layer with a ROS-quenching precursor and a reducing agent; reducing the ROS-quenching precursor to form a ROS-quenching agent on or in the barrier layer
Implementation Method 4
having an ROS-quenching agent adsorbed ther_to
Data Source
AI summary
A sensor for detecting and/or quantifying the amount of analyte in a sample, the sensor including:a sensing region; anda barrier layer including a reactive oxygen species (ROS)-quenching, analyte-permeable membrane having an ROS-quenching agent adsorbed thereto;wherein the sensor is adapted so that the sample enters the sensing region of the sensor through the barrier layer.