LAMP PCR Device Using Phase Change Material and Thermochromic Indicator
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Solution Overview
Problem
Traditional loop-mediated isothermal amplification polymerase chain reaction (LAMP PCR) methods require circuitry for temperature monitoring and control, limiting their applicability, especially in low-resource settings.
Innovation Solution
A LAMP PCR device utilizing an isothermal ballast material and chromogenic agent that changes color at a specific temperature, eliminating the need for monitor and control circuitry, and allowing for low-cost, point-of-care use in settings like water quality assessment and infectious disease detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional LAMP PCR methods use circuitry for temperature monitoring and control, then temperature control precision is improved, but device complexity increases
Solution Approach 1:
The phase change material automatically maintains isothermal conditions through its own phase transition properties, eliminating the need for external temperature monitoring and control circuitry. The system self-regulates temperature without requiring active control mechanisms.
Solution Approach 2:
The invention utilizes the phase transition of a material (from solid to liquid) at a specific temperature to maintain isothermal conditions. This phase change absorbs excess heat and releases heat during solidification, naturally stabilizing the temperature without requiring electronic control.
2Measurement precision
If traditional LAMP PCR methods use temperature monitoring circuitry, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The invention uses thermochromic materials that change color at the target temperature, providing a simple visual indication that the temperature has been reached. This eliminates the need for electronic displays or complex monitoring interfaces while maintaining temperature verification.
Solution Approach 2:
The system automatically indicates when the target temperature is reached through the color change of the thermochromic material, requiring no user interpretation or complex operation. The visual signal is self-evident and requires minimal training to use.
3Ease of manufacture
If LAMP PCR device uses low-cost raw materials and simple design, then ease of manufacture is improved, but reliability may deteriorate
Solution Approach 1:
The phase change material provides inherent temperature stabilization through its phase transition properties, which is a physical phenomenon that cannot fail due to electronic component failure. This physical mechanism ensures reliable isothermal conditions without requiring complex electronic systems.
Solution Approach 2:
The invention combines phase change material with thermochromic indicators in a composite structure that provides both temperature stabilization and visual feedback. This composite approach maintains reliability while using simple, low-cost materials that can be manufactured locally.
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 LAMP PCR to be performed without complex equipment, facilitating point-of-care diagnostics in low-resource settings through a simple, reusable design that uses a wax-like substance with thermochromic pigment for visual temperature indication, thus enhancing accessibility and usability.
Implementation Method 1
chromogenic agent that melts at a specific temperature and displays a color change
Implementation Method 2
wax-like substance that has been designed to melt at a predetermined temperature
Data Source
AI summary
The present invention provides a device and method for testing a material for the presence of DNA. The system includes a centrifuge, a microchip performing cell lysis and an enclosure that contains an isothermal ballast material and chromogenic agent that melts at a specific temperature and displays a color change, respectively.