Colorimetric Nucleic Acid Amplification Assay Heating
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Solution Overview
Problem
Current LAMP colorimetric methods are limited to end-point measurements due to difficulties in real-time visual monitoring, as the heating process causes sample evaporation, obstructing visibility from the top of the reaction vessel, making real-time monitoring impossible.
Innovation Solution
A method where the bottom of the reaction tube is brought into thermal contact with a heating element, allowing for efficient heating without immersion, enabling visual monitoring through the side wall and using a digital camera for real-time colorimetric nucleic acid amplification assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reaction vessel is immersed in a heating block for efficient heating, then amplification efficiency is improved, but real-time visual monitoring becomes impossible due to vapor obstruction
Solution Approach 1:
A transparent or translucent heat-resistant film is introduced as an intermediary between the heating block and the reaction vessel. This film allows thermal energy to pass through while preventing vapor from reaching and obstructing the viewing path, thus enabling both efficient heating and real-time visual monitoring simultaneously
Solution Approach 2:
The monitoring approach is shifted from vertical viewing (through the top of the vessel where vapor accumulates) to horizontal viewing (through the side wall of the vessel). This dimensional change in observation perspective allows visualization without interference from vapor, as the film blocks vapor only in the vertical path between the heating block and vessel top
2Device complexity
If end-point measurement is used for colorimetric detection, then equipment complexity is reduced, but measurement precision and quantitative capability are limited
Solution Approach 1:
The system enables continuous real-time monitoring of color changes throughout the amplification process rather than single end-point measurement. This continuous observation allows tracking of the amplification kinetics and provides multiple data points for more precise quantitative analysis, while still using simple colorimetric detection without complex equipment
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 real-time monitoring of color changes during the amplification process, reducing the time required for assays and improving energy efficiency, while maintaining effective heating, suitable for point-of-care applications.
Implementation Method 1
heating the liquid phase by bringing the bottom of the tube containing the liquid phase in thermal contact with a heating element
Implementation Method 2
colorimetric nucleic acid amplification assay
Data Source
AI summary
Method and apparatus for performing a real-time colorimetric nucleic acid amplification assay wherein the heating of the liquid sample comprised in a reaction tube is carried out by bringing the bottom of the tube in thermal contact with a heating element. The real-time monitoring of the content of the reaction tube is carried out visually through the side wall of the tube, preferably by using a camera.