Handheld Nucleic Acid Detection via Microfluidic Chip Integration
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Solution Overview
Problem
Conventional nucleic acid detection methods are cumbersome, complex, and require professional personnel and specialized equipment, limiting their accessibility and usability outside of tertiary hospitals.
Innovation Solution
A hand-held nucleic acid detection apparatus equipped with a microfluidic chip that integrates sample collection, reagent reaction, and detection processes, allowing for simplified operation and use without the need for dedicated training or specialized sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional nucleic acid detection methods are used, then detection accuracy can be maintained, but the operation becomes cumbersome and complex requiring professional personnel
Solution Approach 1:
The patent integrates multiple detection functions (sample collection, nucleic acid extraction, PCR amplification, and detection) into a single handheld device with a unified structure. The device combines a sample collection tube, chip connector, and detection chip with integrated flow channels and reaction chambers, eliminating the need for separate equipment and complex operational procedures across multiple devices.
Solution Approach 2:
The handheld device performs multiple functions including sample collection, nucleic acid extraction, PCR amplification, and fluorescence detection within a single integrated system. The detection chip incorporates multiple reaction chambers that can handle different sample types and detection protocols, making the device versatile for various nucleic acid detection applications without requiring specialized equipment for each function.
2Reliability
If conventional nucleic acid detection equipment is used, then reliable detection results can be obtained, but the device size becomes large requiring specialized laboratories
Solution Approach 1:
The device employs a nested structure where the detection chip with integrated flow channels and reaction chambers is inserted into the chip connector, which is then placed within the handheld device housing. The sample collection tube nests within the device body, and the entire system is compacted into a portable handheld format that maintains laboratory-grade detection capabilities in a field-deployable size.
Solution Approach 2:
The patent combines previously separate components (sample collection system, nucleic acid extraction module, PCR amplification system, and fluorescence detector) into a single integrated handheld device. This consolidation reduces the overall device volume from laboratory-scale equipment to a portable format while maintaining detection reliability through integrated fluidic pathways and controlled reaction environments.
3Productivity
If conventional detection procedures are followed, then accurate results can be achieved, but the detection time becomes long due to multiple steps
Solution Approach 1:
The detection process is segmented into distinct functional zones within the detection chip, including separate reaction chambers for different PCR stages and integrated flow channels for automated sample transport. This segmentation allows parallel processing of multiple samples and reagents simultaneously through the microfluidic system, reducing total detection time compared to sequential manual operations.
Solution Approach 2:
The device pre-loads reagents into the detection chip chambers before sample analysis. The microfluidic system is pre-configured with integrated flow channels that automatically transport samples and reagents through the detection process without manual intervention. This preliminary preparation eliminates time-consuming manual setup and reagent handling steps during actual detection.
4Measurement precision
If traditional nucleic acid detection is performed, then comprehensive analysis can be conducted, but the cost of reagents and instruments becomes high
Solution Approach 1:
The device utilizes microfluidic hydraulic principles to precisely control and transport minute volumes of samples and reagents through integrated flow channels. The microfluidic system delivers exact reagent amounts to reaction chambers, minimizing waste and reducing overall reagent consumption while maintaining detection sensitivity through precise fluid control and optimized reaction conditions.
Solution Approach 2:
The detection chip incorporates optimized reaction chamber geometries and microfluidic flow rates that enhance detection sensitivity without requiring large reagent volumes. The system adjusts fluid flow parameters and reaction conditions within the micro-scale chambers to achieve high measurement precision with minimal reagent input, reducing costs while maintaining analytical performance.
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 apparatus enables rapid, efficient, and sensitive nucleic acid detection with simplified operation, making it suitable for use in communities, hospitals, home settings, and public places, facilitating real-time screening and self-health monitoring during epidemic prevention and control.
Implementation Method 1
the reaction solution in the sample collection tube flows, through the pierce tube, into a reaction and detection chamber via the sample inlet channel on the detection chip under a gravitational force
Data Source
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AI summary
The present disclosure pertains to the technical field of microfluidic chips, and relates to a hand-held nucleic acid detection apparatus equipped with microfluidic chip, and a use method thereof. The detection apparatus includes a sample collection tube, a chip connector, and a detection chip. The chip connector is provided with a pierce tube configured to pierce the sample collection tube. The detection chip is connected to the chip connector. The detection chip is provided with a plurality of chambers and a plurality of flow channels. The flow channels are in communication with the pierce tube and the chambers. The reaction reagent and all the reaction processes are integrated on a chip, with no need of solution injection by virtue of an external instrument, solution transfer or the like operations, and the nucleic acid detection may be carried out even in the case of no dedicated experiment sites or special conditions. Therefore, the detection apparatus may be applied to communities, hospitals, home self-detection, and public places, such that real-time screening and detection, and self-health state monitoring are achieved during epidemic prevention and control.