Microfluidic Nucleic Acid Analysis Device
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Solution Overview
Problem
Current microfluidic systems for nucleic acid analysis require separate devices for cell capture, lysis, nucleic acid extraction, and amplification, which can lead to contamination and inefficiencies, especially in point-of-care diagnostics where accuracy and sensitivity are critical.
Innovation Solution
A microfluidic system that integrates cell capture, lysis, and nucleic acid amplification in a single device, featuring a binding-lysis chamber, rehydration chambers with nucleic acid amplification reagents, and a flow channel system for integrated fluid flow, including pneumatic control for cell lysis and reagent distribution, allowing for efficient and automated processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for cell capture, lysis, nucleic acid extraction, and amplification, then each process can be optimized independently, but contamination risk increases and operational efficiency decreases
Solution Approach 1:
The patent integrates cell capture, lysis, nucleic acid extraction, and amplification processes into a single microfluidic device with multiple interconnected chambers. This merging eliminates the need for multiple separate devices, reduces contamination risk between processes, and maintains operational efficiency through integrated fluid flow control.
Solution Approach 2:
The microfluidic device performs multiple functions within a single system: cell capture in a binding chamber, lysis in a lysis chamber, nucleic acid extraction, and amplification in an amplification chamber. This multi-functionality resolves the contradiction by allowing one device to replace multiple specialized devices while maintaining process optimization.
2Productivity
If multiple separate devices are used for different nucleic acid processes, then process optimization is easier, but contamination risk and operational time increase
Solution Approach 1:
The microfluidic device enables continuous processing of nucleic acid analysis through integrated fluid flow. Samples automatically progress from cell capture through lysis, extraction, and amplification without interruption or manual transfer between devices, eliminating idle time and maintaining continuous productive action throughout the analysis workflow.
Solution Approach 2:
By combining all nucleic acid processing steps in one device with automated fluid flow, the system eliminates the time losses associated with manual sample transfer between separate devices. The integrated design maintains productivity by allowing simultaneous preparation and processing while reducing total operational time.
3Reliability
If separate devices are used for each nucleic acid process, then device manufacturing is simpler, but contamination risk increases
Solution Approach 1:
The integrated microfluidic device is manufactured using segmentation principles with distinct chambers for cell capture, lysis, extraction, and amplification. Each chamber is designed and fabricated separately using standard microfluidic manufacturing techniques, then assembled into a single integrated device. This approach maintains ease of manufacture while achieving contamination control through physical separation of processes within the integrated system.
Solution Approach 2:
The patent merges multiple process chambers into a single integrated microfluidic device with controlled fluid flow paths. This combining approach prevents contamination by eliminating manual sample transfer between separate devices, while the modular chamber design maintains manufacturing simplicity through standardized fabrication and assembly procedures.
4Ease of operation
If manual operation is used for each nucleic acid process step, then flexibility is maintained, but operational complexity and contamination risk increase
Solution Approach 1:
The microfluidic device implements self-service through automated fluid flow control that automatically progresses samples through cell capture, lysis, extraction, and amplification without manual intervention. The integrated design allows the system to perform all operations autonomously, improving ease of operation by eliminating manual steps while the modular chamber architecture maintains manageable device complexity.
Solution Approach 2:
The patent combines multiple manually operated processes into a single automated microfluidic system. The integration merges cell capture, lysis, extraction, and amplification chambers with automated fluid flow control, improving ease of operation by eliminating manual sample transfer while managing device complexity through standardized microfluidic design and assembly.
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 efficient, automated, and contamination-free nucleic acid analysis by integrating all necessary processes in a single device, enhancing accuracy and sensitivity for point-of-care diagnostics, particularly suitable for infectious disease and cancer diagnostics.
Implementation Method 1
a pneumatic part bonded to a bottom surface of the membrane part, the pneumatic part having a plurality of ports for applying pneumatic pressure at a predetermined position of the membrane part
Data Source
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AI summary
Provided is a microfluidic system for analyzing nucleic acid, the microfluidic system including a reagent supply device including a sample chamber in which a sample as an examination target is injected, a plurality of reagent chambers in which a reagent for extracting nucleic acid from the sample is injected, and a waste chamber in which the used reagent is discarded, a binding-lysis chamber in which cells are captured from the sample and the captured cells are lysed to form a cell lysate containing nucleic acid, a plurality of rehydration chambers in which the cell lysate formed in the binding-lysis chamber is distributed and introduced to form an amplification reaction mixture, a plurality of amplification chambers in which a nucleic acid amplification reaction is performed on the amplification reaction mixture introduced from the plurality of rehydration chambers, and a flow channel system including an outlet and a plurality of inlets connected to the reagent supply device and forming an integrated fluid flow between the binding-lysis chamber, the rehydration chambers, and the amplification chambers.