FET Biosensor Noise Reduction for Accurate Urine Biomarker Detection
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Solution Overview
Problem
Current diagnostic methods for urine analysis, such as urine culture, microscopy, and dipstick tests, are expensive, time-consuming, and prone to inaccuracies due to subjective interpretation, while existing urine analyzers lack sensitivity and reliability for non-invasive detection of biomarkers and pH variations.
Innovation Solution
A biosensing device using a Field-Effect Transistor (FET) with a microfabricated gold electrode and advanced noise reduction methods, incorporating classical signal processing and machine learning techniques, enhances signal-to-noise ratio (SNR) for accurate detection of biomarkers and pH in urine samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic methods (urine culture, microscopy, dipstick tests) are used, then ease of operation and low cost are achieved, but measurement precision and reliability deteriorate due to subjective interpretation and inaccuracies
Solution Approach 1:
The patent replaces manual visual interpretation of dipstick color changes with an automated Field-Effect Transistor (FET) based biosensing system. The FET device electronically detects and quantifies biomarkers, eliminating subjective human interpretation and significantly improving measurement precision while providing objective, reproducible results.
Solution Approach 2:
The patent introduces specialized biorecognition elements (such as antibodies, enzymes, or aptamers) as intermediaries between the urine sample and the FET sensor. These elements specifically bind to target biomarkers, enabling selective and sensitive detection while the FET transducer converts the biological interaction into a measurable electrical signal.
2Reliability
If FET-based biosensing device is used, then measurement precision and sensitivity are improved, but device complexity increases due to microfabricated electrodes and advanced signal processing requirements
Solution Approach 1:
The patent employs a nested structure where biorecognition elements are integrated onto the FET gate electrode surface, which itself is part of a microfabricated sensor chip. This nested arrangement allows the complex functionality of specific biomarker detection to be embedded within the compact FET device structure, improving reliability while managing complexity through integration.
Solution Approach 2:
The patent utilizes the FET's electrical parameters (such as threshold voltage, drain current, or transconductance) as sensing outputs that change in response to biomarker binding events. By monitoring these electrical parameter changes rather than requiring complex mechanical or optical readout systems, the device achieves high reliability with relatively simplified signal processing.
3Measurement precision
If advanced noise reduction methods are implemented, then measurement precision is improved, but device complexity and processing time increase
Solution Approach 1:
The patent implements noise reduction algorithms that process and clean sensor signals in real-time or near-real-time as data is acquired. By applying filtering and signal enhancement techniques during the measurement process rather than requiring extensive post-processing, the system improves signal-to-noise ratio without significant delays in obtaining diagnostic results.
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 device provides high sensitivity and specificity for detecting biomarkers like IgG and pH with improved accuracy, enabling early disease detection and monitoring, with potential applications in medical diagnostics, environmental monitoring, and personalized health management.
Implementation Method 1
A biosensing device utilizing a Field-Effect Transistor (FET) to detect biomarkers in urine samples
Implementation Method 2
by responding to changes in the electrical properties of the transistor's gate
Implementation Method 3
The device employs a microfabricated gold electrode functioning as an extended-gate (EG)
Implementation Method 4
incorporates advanced signal processing techniques to enhance measurement accuracy and reliability
Data Source
Figure 1~3A
Figure 3B~3C
Figure 4~6A
AI summary
The present disclosure relates to a highly sensitive biosensing device based on field-effect transistors (FETs) for the detection and quantification of pH and biomarkers in urine samples. The described biosensing device has applications in medical diagnostics, environmental monitoring, and personalized health management, offering a robust tool for early detection and monitoring of various health conditions.