Lamp Testing Device Using Isothermal Amplification for Pathogen Identification
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Solution Overview
Problem
Current LAMP assay devices face challenges in achieving homogeneous temperature control and accurate color change reading, limiting their effectiveness in pathogen detection, particularly during the COVID-19 pandemic, due to high costs, infrastructure requirements, and personnel training constraints.
Innovation Solution
A LAMP assay device with a cylindrical metal thermoblock for uniform heating, combined with multi-platform software for smartphone or computer control, and image processing for automatic result interpretation, ensuring efficient thermal management and data security through IoT technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional LAMP assay devices use simple heating plates or convection heating, then device complexity is reduced, but temperature control homogeneity deteriorates
Solution Approach 1:
The heating system is segmented into multiple independent heating zones within the heating chamber, each capable of independent temperature control. This segmentation allows different regions to be optimized for specific functions (e.g., sample heating, reagent heating, incubation), thereby achieving homogeneous temperature control across the entire system without requiring overly complex centralized control mechanisms.
Solution Approach 2:
Different regions of the heating chamber are designed with locally optimized thermal properties. For example, areas where samples are placed have enhanced thermal conductivity and insulation to maintain stable temperatures, while other areas may have different thermal characteristics suited for their specific functions. This local quality approach ensures homogeneous temperature control in critical zones without uniformly increasing system complexity.
2Device complexity
If LAMP assay devices use manual color change reading, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The manual visual inspection method is replaced with an automated optical detection system that uses sensors and image processing algorithms to analyze color changes in real-time. This substitution of mechanical/manual operations with automated systems dramatically improves measurement precision while the modular design of the detection system keeps overall device complexity manageable.
Solution Approach 2:
Instead of direct visual inspection, the system creates digital copies (images) of the colorimetric reactions and processes these images through software algorithms. This copying approach allows for precise, objective measurement of color changes without requiring complex optical hardware, thereby improving measurement precision while controlling device complexity.
3Ease of operation
If LAMP assay devices are deployed in remote locations with resource limitations, then accessibility is improved, but reliability deteriorates due to environmental constraints
Solution Approach 1:
The device incorporates dynamic environmental compensation mechanisms that automatically adjust operating parameters based on detected environmental conditions (temperature, humidity, light levels). This dynamic adaptation allows the device to maintain reliable diagnostic accuracy across varying environmental conditions while remaining simple enough for deployment in remote locations.
Solution Approach 2:
The device includes built-in compensation algorithms and control mechanisms that anticipate and counteract the effects of environmental variations before they compromise diagnostic reliability. For example, the system pre-calibrates for temperature effects and automatically adjusts measurement parameters to compensate for environmental constraints, ensuring reliable operation in resource-limited settings.
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 enables rapid, accurate, and cost-effective pathogen identification, including SARS-CoV-2, Dengue, Zika, and Chikungunya, in remote locations, reducing personnel risk and improving diagnostic capacity, especially in resource-limited settings.
Implementation Method 1
at least one heating element in contact with the thermoblock and adapted to heat the thermoblock microtubes by induction
Implementation Method 2
which allows the reading of fluorescence in different bands
Data Source
AI summary
The present invention provides a LAMP assay device that promotes isothermal RNA/DNA amplification applied to pathogen identification, comprising: a LAMP assay chamber (1); an electronics cabinet (4), a power supply means (7); and a top lid (2) for closing the LAMP assay chamber (1), wherein internally the device comprises: a metal cylindrical thermoblock (8) comprising openings (80) for positioning microtubes (81); a control board with central processing (14); a power electronics board (13); at least one heating element (10) in contact with the thermoblock (8) and adapted to heat the thermoblock (8) by induction; a temperature sensor (9) adapted to measure the temperature of the thermoblock (8); a plurality of RGB LEDs (12) positioned below the thermoblock (8) and adapted to excite each microtube positioned in the thermoblock (8); and a camera (11) positioned below the thermoblock (8) and adapted to capture images of each of the microtubes (81) positioned in the thermoblock (8). In addition, the invention provides a method for pathogen identification from a LAMP assay device.