IoT Portable dPCR System Plasmonic Heating Module
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Solution Overview
Problem
Conventional digital PCR systems are limited in detecting multiple mutants simultaneously due to high costs, complex operation, high power consumption, and lengthy detection times, making them unsuitable for field deployment and efficient diagnosis of infectious diseases like coronavirus.
Innovation Solution
An IoT-based portable digital PCR system incorporating a self-fractionation microfluidic chip, plasmonic heating module, multiplex fluorescence imaging module, and smartphone application for rapid, low-power DNA amplification and simultaneous detection of multiple DNAs, enabling convenient and accurate on-site diagnosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional digital PCR systems are used to detect multiple mutants, then detection accuracy is maintained, but device complexity and cost increase significantly
Solution Approach 1:
The system divides the detection process into distinct functional modules: a microfluidic chip for sample preparation and fractionation, a heating module for PCR amplification, and an imaging module for fluorescence detection. Each module performs a specific function, allowing the system to detect multiple mutants simultaneously while maintaining manageable complexity through modular architecture
Solution Approach 2:
The microfluidic chip serves multiple functions: it performs sample fractionation, nucleic acid amplification, and fluorescence detection in an integrated platform. The heating module provides thermal cycling for PCR while the imaging module captures fluorescence signals from multiple channels, enabling the system to detect multiple different mutants using a single universal device
2Adaptability or versatility
If conventional dPCR systems are deployed for field use, then diagnostic capability is provided, but power consumption becomes excessively high
Solution Approach 1:
The heating module uses optimized thermal parameters including controlled heating rates, hold temperatures, and cycle times to minimize energy consumption while maintaining PCR amplification efficiency. The system adjusts thermal cycling parameters to achieve diagnostic results with lower power requirements compared to conventional dPCR systems
Solution Approach 2:
The system employs periodic thermal cycling with optimized cycle numbers and durations to perform PCR amplification. By using a limited number of thermal cycles with optimized timing, the system reduces cumulative power consumption while still achieving sufficient amplification for field deployment scenarios
3Speed
If conventional dPCR systems are used for rapid diagnosis, then diagnostic speed is improved, but detection time remains too long for urgent cases
Solution Approach 1:
The microfluidic chip performs preliminary sample fractionation and preparation before PCR amplification begins. By pre-separating and concentrating target nucleic acids in the microfluidic device, the system reduces the time required for subsequent amplification and detection steps, enabling faster overall diagnostic turnaround
Solution Approach 2:
The system uses a reduced number of PCR amplification cycles optimized for rapid detection of high-prevalence targets. By skipping unnecessary amplification cycles and using optimized primer/probe sets, the system achieves sufficient detection sensitivity in fewer cycles, significantly reducing total detection time for urgent diagnostic cases
4Ease of operation
If conventional dPCR systems are operated by non-experts, then ease of operation is improved, but operational complexity remains high
Solution Approach 1:
The microfluidic chip performs self-fractionation of samples through integrated microfluidic channels and structures that automatically separate and concentrate target nucleic acids without requiring manual manipulation. The system includes automated controls for thermal cycling and fluorescence imaging, reducing the need for expert operation while maintaining diagnostic accuracy
Solution Approach 2:
The system merges multiple complex functions into a single integrated device: sample fractionation, nucleic acid amplification, and fluorescence detection are combined in one portable platform. This integration simplifies the operational workflow for users, as they need to operate only one unified system rather than multiple separate instruments, making the device more accessible to non-experts
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 allows for rapid diagnosis of infectious diseases, including coronavirus variants, by minimizing detection time and power consumption while enabling non-experts to perform digital PCR analysis, making it suitable for field deployment and on-site use.
Implementation Method 1
a heater located at one side of the microfluidic chip and configured to perform heating to allow a nucleic acid disposed in the microfluidic chip to be amplified
Implementation Method 2
an image capturer located at the other side of the microfluidic chip and configured to capture fluorescence images of the microfluidic chip to detect the amplified nucleic acid
Data Source
AI summary
Disclosed are an IoT-based portable dPCR system and a plasmonic heating module included therein, wherein the IoT-based portable dPCR system is a field-deployable diagnostic technique against the worldwide spread of infectious diseases, such as coronavirus, and is capable of detecting a plurality of viruses at once and being field-deployed through smartphone-based operation.