POCT Microfluidic Chip Multi-Zone Temperature Control
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Solution Overview
Problem
Current POCT products lack the capability for accurate quantitative detection of molecular components, relying on qualitative chromatographic immunoassays, and existing PCR technologies require complex and costly temperature control equipment for cyclic amplification reactions.
Innovation Solution
A POCT microfluidic chip with at least two constant temperature chambers connected by microchannels, utilizing superconducting thermal bodies and airbag pools for temperature control, enabling efficient and accurate nucleic acid detection with reduced operational complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time fluorescent quantitative PCR detection technology is used, then measurement precision is improved, but device complexity and cost increase due to requirements for multiple temperature chambers and complex temperature control equipment
Solution Approach 1:
The reaction chamber is divided into multiple independent temperature control zones (first temperature control zone, second temperature control zone, third temperature control zone) that can be independently controlled. Each zone can maintain different temperatures simultaneously, allowing the system to perform multiple temperature-dependent PCR steps without requiring a complex rotating or moving temperature control mechanism, thus reducing overall device complexity while maintaining quantitative detection capability
Solution Approach 2:
Different regions of the reaction chamber are assigned different temperature characteristics tailored to specific reaction needs. The first temperature control zone provides one temperature for denaturation, the second for annealing, and the third for extension, allowing each local region to have optimal conditions for its specific function while simplifying the overall temperature control architecture
2Measurement precision
If multiple temperature requirements for cyclic amplification reactions are met, then measurement precision is improved, but ease of operation deteriorates due to complex operating procedures
Solution Approach 1:
The system automatically manages the temperature cycling process by sequentially activating different temperature control zones according to a predetermined program. The microfluidic chip structure with integrated heating elements enables automated temperature transitions without manual intervention, and the system self-regulates the reaction conditions, eliminating complex manual operation while maintaining precise quantitative detection
3Measurement precision
If conventional PCR equipment is used, then measurement precision is improved, but portability deteriorates due to large size and high cost
Solution Approach 1:
The patent integrates multiple temperature control zones, microfluidic reaction channels, and detection systems into a single compact platform. The multi-zone temperature control is achieved within one integrated chamber structure rather than requiring separate equipment, and the microfluidic integration enables portable operation while maintaining real-time fluorescent quantitative PCR capability
Solution Approach 2:
The reaction chambers are nested within a compact housing that contains all necessary components (heating elements, temperature sensors, microfluidic channels, detection systems) in a space-efficient arrangement. The multi-functional integrated chip allows the system to perform multiple functions in a small footprint, achieving portability without sacrificing quantitative detection precision
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 POCT microfluidic chip simplifies temperature control, reduces costs, and enables fast, accurate, and portable molecular diagnostics, suitable for widespread use in various settings, while maintaining the functionality of real-time fluorescent quantitative PCR.
Implementation Method 1
a bottom of the constant temperature chambers is embedded with a superconducting thermal body
Data Source
AI summary
The invention discloses a POCT microfluidic chip and a detection system. The POCT microfluidic chip comprises an upper casing and a lower casing, and also comprises a sample pool, a mixed liquid pool, a waste liquid pool and a reaction pool. The reaction pool is connected to the mixed liquid pool through a microchannel, wherein the reaction pool comprises at least two constant temperature chambers, wherein a bottom of each constant temperature chamber is embedded with a superconducting thermal body and each constant temperature chamber has a different temperature, wherein the constant temperature chambers communicate with each other through microchannels, wherein each constant temperature chamber is equipped with an airbag pool, which communicates with a corresponding constant temperature chamber through a microchannel.