Isothermal Nucleic Acid Analysis on Portable Microfluidic Chip
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Solution Overview
Problem
Conventional methods for extracting, amplifying, and detecting nucleic acids are not robust enough for field deployment, requiring specialized lab infrastructure, skilled labor, and specific environmental conditions, making them inefficient and impractical for mobile or point-of-care applications.
Innovation Solution
A portable system using a compact integrated chip for nucleic acid extraction, amplification, and detection, which is compact, robust, and can operate outside traditional lab settings, employing non-thermal amplification methods and wireless communication for rapid analysis and data distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional extraction and amplification methods are used, then measurement precision and accuracy are maintained, but the process takes hours to weeks and requires specialized lab infrastructure
Solution Approach 1:
The patent applies parameter changes by transitioning from conventional thermal cycling PCR to isothermal amplification methods (such as LAMP, RPA, or NASBA) that operate at constant temperatures. This fundamental parameter change in the amplification process enables rapid analysis within minutes to hours while maintaining detection accuracy, and eliminates the need for complex thermal cyclers and specialized lab infrastructure.
Solution Approach 2:
The patent replaces the mechanical thermal cycling system with isothermal amplification chemistry that does not require repeated heating and cooling cycles. This substitution eliminates the need for thermocyclers, reduces equipment complexity, and dramatically decreases analysis time while preserving nucleic acid detection precision through alternative amplification mechanisms.
2Reliability
If conventional PCR with thermal cycling is used, then amplification fidelity is maintained, but the system becomes complex and requires electricity and refrigeration
Solution Approach 1:
The patent replaces the mechanical thermal cycling system with isothermal amplification chemistry that does not require repeated heating and cooling cycles. This substitution eliminates the need for thermocyclers, reduces equipment complexity, and dramatically decreases analysis time while preserving nucleic acid detection precision through alternative amplification mechanisms.
Solution Approach 2:
The patent applies parameter changes by transitioning from conventional thermal cycling PCR to isothermal amplification methods (such as LAMP, RPA, or NASBA) that operate at constant temperatures. This fundamental parameter change in the amplification process enables rapid analysis within minutes to hours while maintaining detection accuracy, and eliminates the need for complex thermal cyclers and specialized lab infrastructure.
3Measurement precision
If skilled labor and specialized infrastructure are required, then measurement precision is maintained, but ease of operation and field deployability are reduced
Solution Approach 1:
The patent implements self-service through pre-packaged, single-use assay cartridges that contain all necessary reagents, primers, and controls in pre-measured quantities. The system automatically performs sample processing, amplification, and detection through integrated microfluidic channels and optical detection, eliminating the need for skilled laboratory technicians while maintaining quantitative accuracy. Users simply load the cartridge and insert the sample.
Solution Approach 2:
The patent applies preliminary action by pre-preparing and pre-quantifying all reagents, primers, and controls in the disposable cartridges before use. The microfluidic system is pre-configured with all necessary channels, valves, and detection elements. This preliminary preparation eliminates the need for skilled labor during operation, as the system automatically executes the complete analysis protocol without requiring user intervention in complex procedures.
4Manufacturing precision
If tight control of temperature, pH, and buffer ingredients is required, then manufacturing precision is maintained, but adaptability to field conditions is reduced
Solution Approach 1:
The patent implements self-service through pre-packaged, single-use assay cartridges that contain all necessary reagents, primers, and controls in pre-measured quantities. The system automatically performs sample processing, amplification, and detection through integrated microfluidic channels and optical detection, eliminating the need for skilled laboratory technicians while maintaining quantitative accuracy. Users simply load the cartridge and insert the sample.
Solution Approach 2:
The patent applies parameter changes by transitioning from conventional thermal cycling PCR to isothermal amplification methods (such as LAMP, RPA, or NASBA) that operate at constant temperatures. This fundamental parameter change in the amplification process enables rapid analysis within minutes to hours while maintaining detection accuracy, and eliminates the need for complex thermal cyclers and specialized lab infrastructure.
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 rapid, accurate, and cost-effective nucleic acid analysis in under an hour, with high precision and sensitivity, capable of detecting few cells and distinguishing between species or mutations, without the need for skilled labor or specialized infrastructure.
Implementation Method 1
The nucleic acid detection module may employ capillary electrophoresis
Implementation Method 2
The amplification chamber may be heated by a heating element
Data Source
AI summary
A portable system for extracting, optionally amplifying, and detecting nucleic acids or proteins using a compact integrated chip in combination with a mobile device system for analyzing detected signals, and comparing and distributing the results via a wireless network. Related systems and methods are provided.