Microfluidic PCR Chip for Integrated Nucleic Acid Processing
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Solution Overview
Problem
PCR-based assays are tedious, time-consuming, resource-intensive, prone to contamination, and require high operator skill, necessitating the development of devices and methods for efficient nucleic acid amplification and detection.
Innovation Solution
Microfluidic chips with a chamber and a nucleic acid concentrator capable of preferentially and reversibly binding nucleic acids, integrated with a method for sample processing that includes lysis, nucleic acid isolation, and amplification, allowing for efficient PCR-based processes and multiplexed detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional PCR-based assays are used, then nucleic acid amplification can be achieved, but the process is tedious, time-consuming, and resource-intensive
Solution Approach 1:
The patent combines multiple PCR-based assays into a single integrated microfluidic chip, allowing simultaneous amplification of multiple nucleic acid targets. This merging of functions reduces the total time and resources required compared to performing separate PCR assays sequentially, directly addressing the contradiction between productivity and time loss.
Solution Approach 2:
The microfluidic chip is designed as a universal platform that can perform multiple PCR-based detection functions within a single device. The chip includes multiple chambers and channels that enable concurrent amplification and detection of different nucleic acid sequences, thereby improving productivity while reducing the time investment required for comprehensive analysis.
2Ease of operation
If conventional PCR-based assays are used, then nucleic acid amplification can be achieved, but they require high operator skill and experience
Solution Approach 1:
The microfluidic chip is designed to automate the PCR process, with reagents and samples automatically mixed, heated, and processed through integrated heating elements and fluid control mechanisms. This self-service capability reduces the skill level required from the operator while maintaining reliable and consistent assay results through precise automated control of reaction conditions.
Solution Approach 2:
The patent replaces manual mechanical operations (pipetting, heating, mixing) with integrated microfluidic systems that use controlled fluid flow and electric heating. This substitution of mechanical manual operations with automated microfluidic control simplifies the user interface and reduces the skill required while ensuring consistent and reliable PCR results through precise digital control of parameters.
3Reliability
If conventional PCR-based assays are used, then nucleic acid amplification can be achieved, but they are prone to contamination
Solution Approach 1:
The microfluidic chip divides the PCR process into separate, isolated chambers and channels, with physical barriers between different reaction zones. This segmentation prevents cross-contamination between different nucleic acid targets and between sample and reagent areas, improving reliability while the integrated design keeps the overall system manageable in complexity.
Solution Approach 2:
The microfluidic chip creates a closed, controlled environment for the PCR reaction, isolating the amplification process from external contaminants. The sealed channels and chambers maintain a controlled internal atmosphere that prevents contamination from the external environment, thereby improving reliability without significantly increasing operational complexity.
4Productivity
If conventional PCR-based assays are used, then nucleic acid amplification can be achieved, but they are labor intensive
Solution Approach 1:
The patent integrates multiple PCR reactions and sample processing steps into a single microfluidic chip that can be processed simultaneously. This merging allows parallel processing of multiple samples and targets, dramatically increasing productivity while reducing the total labor required compared to performing each step manually and sequentially.
Solution Approach 2:
The microfluidic chip automates the PCR process through integrated pumping, heating, and mixing systems that operate without continuous manual intervention. The self-service automation handles reagent dispensing, temperature cycling, and sample processing, thereby increasing processing speed while significantly reducing the labor input required from the operator.
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 solution simplifies and streamlines PCR processes, reducing resource and labor requirements, enabling efficient nucleic acid amplification and detection while minimizing contamination and operator skill needs.
Implementation Method 1
a nucleic acid concentrator disposed within the chamber, the nucleic acid concentrator being porous, the nucleic acid concentrator being positioned within the chamber such that the nucleic acid concentrator is in fluid communication with the inlet, the outlet, or both; and the nucleic acid concentrator being capable of preferentially and reversibly binding a nucleic acid
Data Source
AI summary
Disclosed are integrated devices capable of performing a polymerase chain reaction within a single vessel. Also disclosed are related methods of sample analysis.