Microfluidic PCR Thermal Zones for Faster Thermocycling
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Solution Overview
Problem
The thermocycling rate in microfluidics processes is limited, which hampers the overall processing time, particularly in point-of-care applications.
Innovation Solution
A microfluidics system with thermal control mechanisms and techniques that include closely spaced thermal zones and electrodes, allowing for rapid droplet transitions and movements across steep temperature gradients, minimizing the number of operations required for PCR protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional thermocycling rates are used in microfluidics processes, then the system is easier to control and maintain, but the overall processing time increases
Solution Approach 1:
The device divides the thermocycling process into distinct spatial zones (hot zone at 95°C, cold zone at 4°C) along the fluidic pathway, allowing different temperature conditions to occur simultaneously at different locations rather than sequentially, thereby reducing total processing time
Solution Approach 2:
The patent transitions from temporal thermocycling (heating and cooling sequentially over time) to spatial thermocycling (multiple temperature zones arranged along the flow path), adding a spatial dimension to the temperature control strategy and enabling parallel temperature processing
2Loss of time
If closely spaced thermal zones are implemented, then temperature gradient times are shortened, but device complexity increases
Solution Approach 1:
The device uses fluid flow dynamics to transport samples through the thermal zones, leveraging the hydraulic system to move samples rapidly between temperature regions without requiring complex mechanical actuators or moving parts, thus reducing device complexity while maintaining fast thermal cycling
Solution Approach 2:
Multiple thermal zones and their control functions are integrated into a single continuous fluidic pathway, combining what could be separate heating/cooling devices into one unified microfluidic system, thereby reducing overall device complexity while achieving rapid thermocycling
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 system enables rapid PCR protocols by shortening temperature gradient times, thereby reducing overall processing time and enhancing efficiency in microfluidics systems.
Implementation Method 1
allowing for rapid droplet transitions and movements across steep temperature gradients
Implementation Method 2
closely spaced thermal zones and electrodes, allowing for rapid droplet transitions
Data Source
AI summary
The subject matter relates generally to performing polymerase chain reaction (PCR) in microfluidics devices and more particularly to a microfluidics system, device, and methods for performing rapid polymerase chain reaction (PCR) protocols. In some embodiments, the presently disclosed subject matter provides a microfluidics system including a microfluidics instrument housing a microfluidics cartridge (or device) along with any supporting components. Further, the microfluidics cartridge may be, for example, any fluidics device or cartridge, microfluidics device or cartridge, DMF device or cartridge, droplet actuator, flow cell device or cartridge, and the like.