Immunochromatography Lead Detection Kit for Rapid Clinical Screening
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Solution Overview
Problem
Current lead detection methods, such as tungsten boat atomic absorption spectrometry, are complex, costly, and have high instrument requirements, limiting their practical application in clinical settings due to issues like matrix interference, high throughput limitations, and the need for frequent reagent replacement and strict experimental conditions.
Innovation Solution
A detection kit utilizing immunochromatography with a detection card containing a sample pad, glass fiber membrane coated with lead-specific antibodies and fluorescent microspheres, and nitrocellulose membrane with lead-conjugated hapten, allowing for rapid, single-person, high-throughput detection of lead content in blood and urine samples at room temperature with low instrument costs and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional atomic absorption spectrometry with tungsten boat is used for lead detection, then detection accuracy is improved, but device complexity and operational complexity increase
Solution Approach 1:
The patent replaces the complex atomic absorption spectrometry system with an immunochromatography-based detection system. Instead of using tungsten boat atomization and spectral analysis, the invention employs antibody-antigen recognition and fluorescent signal detection, significantly simplifying the device structure while maintaining detection capability.
Solution Approach 2:
The patent creates a simplified detection model by using fluorescent microspheres conjugated with antibodies that mimic the complex atomic absorption process. The fluorescent signal serves as a copy of the lead detection function, eliminating the need for complex instrumentation while preserving measurement accuracy.
2Measurement precision
If traditional atomic absorption spectrometry is used for lead detection, then detection accuracy is improved, but operational complexity and time consumption increase
Solution Approach 1:
The immunochromatography detection system performs self-service through automated capillary action and fluorescent signal generation. The sample automatically migrates through the membrane, and the fluorescent microspheres self-assemble with lead ions, eliminating the need for complex manual operations and instrument adjustments required in atomic absorption spectrometry.
Solution Approach 2:
The patent changes the detection parameters from physical (atomic absorption) to biochemical (antibody-antigen binding and fluorescent emission). This parameter transformation simplifies operations by replacing complex instrumental control with straightforward sample application and signal reading, while maintaining detection accuracy.
3Productivity
If tungsten boat atomic absorption spectrometry is used continuously, then detection throughput is improved, but reliability decreases due to frequent maintenance needs
Solution Approach 1:
The patent employs disposable detection cards with pre-coated antibodies and fluorescent microspheres, eliminating the need for maintainable tungsten boats and element lamps. Each detection card is a single-use component, ensuring consistent reliability across all measurements without degradation from continuous use, while maintaining high detection throughput.
Solution Approach 2:
The system discards the consumable tungsten boat and element lamp after their functional life ends, replacing them with disposable detection cards. This approach maintains continuous operational reliability by eliminating the need to replace and recalibrate complex instrumentation, while preserving high detection throughput through rapid card replacement.
4Measurement precision
If strict experimental conditions are maintained in traditional lead detection, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The detection card is pre-prepared with covalently bound antibodies and fluorescent microspheres during manufacturing, eliminating the need for users to perform complex sample preparation and instrument calibration. The preliminary action of reagent preparation is completed in advance, allowing users to simply apply the sample and read the result without maintaining strict experimental conditions.
Solution Approach 2:
The patent introduces fluorescent microspheres as an intermediary that bridges the sample and detection signal. These microspheres conjugated with antibodies provide a stable, easy-to-apply detection mechanism that maintains measurement precision while eliminating the need for complex instrumental conditions, as the fluorescent signal directly indicates lead presence without requiring controlled atmospheric or electrical parameters.
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 kit provides rapid, accurate, and stable lead detection with high reproducibility, avoiding complex preprocessing and matrix interference, and enabling storage and transportation at room temperature, thus improving clinical usability and reducing detection costs.
Implementation Method 1
A detection kit utilizing immunochromatography with a detection card containing a sample pad, glass fiber membrane coated with lead-specific antibodies and fluorescent microspheres
Implementation Method 2
glass fiber membrane coated with lead-specific antibodies and fluorescent microspheres
Implementation Method 3
nitrocellulose membrane with lead-conjugated hapten
Data Source
AI summary
A detection kit for quickly detecting a lead content lead a sample is provided, and belongs to the technical field of medical in vitro immunoassay. The kit includes a detection card and a quality control; the detection card includes a bottom plate, and a sample pad, a glass fiber membrane, a nitrocellulose membrane and an absorbent paper which are arranged on the surface of the bottom plate sequentially from a loading end. The provided kit has advantages of having simple preprocessing, having no need of digestion, and being economic, fast and convenient, and the like, can realize storage at room temperature, a rapid speed, a high throughout, a low instrument cost, simple and convenient operations, single-person packaging, and detection at any time, which greatly improves the simplicity and convenience of clinical use.