Parallel Branch Microfluidic Apparatus for High-Yield Nucleic Acid Extraction
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Solution Overview
Problem
Current microfluidic treatment systems face challenges in achieving high extraction efficiency and compact, cost-effective sample liquid purification, particularly in lab-on-chip applications, due to limitations in channel arrangement and material usage.
Innovation Solution
A microfluidic treatment apparatus with a parallel filtering and pumping branch system, featuring a filter chamber with isolatable valves and a pumping device with adjustable channel-crossover elements, allows for efficient flushing and purification of sample liquids with minimal dead volume and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional microfluidic channel system is used for sample liquid purification, then the system structure is simple, but the extraction efficiency is low and the device size is large
Solution Approach 1:
The microfluidic channel system is segmented into multiple functional branches (filtering branch with filter chamber, pumping branch with pumping device, flushing branch) that operate in parallel. This segmentation allows simultaneous performance of extraction, pumping, and flushing operations, thereby improving extraction efficiency while maintaining manageable system complexity through modular functional decomposition
Solution Approach 2:
The patent introduces a parallel branch architecture that adds a dimensional aspect to the traditional linear channel system. By creating parallel filtering and pumping branches that connect to common inlet/outlet channels, the system achieves three-dimensional spatial utilization, improving extraction efficiency without proportionally increasing the device footprint
2Manufacturing precision
If more filter elements are used to improve purification quality, then the extraction efficiency increases, but the material consumption and production cost increase
Solution Approach 1:
The flushing branch enables continuous regeneration of the filter element by removing accumulated contaminants. This continuous useful action maintains high purification quality over multiple extraction cycles without requiring replacement of filter elements, thereby reducing material consumption while sustaining manufacturing precision
Solution Approach 2:
The system recovers the filter element's functionality through the flushing branch, which removes accumulated contaminants and restores the filter's separation performance. This recovery process extends the service life of filter elements, reducing material consumption while maintaining purification quality
3Productivity
If the channel system is expanded to include more functional branches, then the extraction efficiency improves, but the device size and material usage increase
Solution Approach 1:
The channel-crossover elements serve multiple functions: they act as connection points for parallel branches, function as flushing junctions, and enable circular flushing pathways. This multi-functionality allows the system to achieve high extraction efficiency through parallel processing while minimizing the number of dedicated components, thereby reducing overall device size
Solution Approach 2:
The patent merges the inlet and outlet channels to form a circular flushing pathway that integrates the flushing function into the existing channel structure. By combining the flushing branch with the main processing channels rather than creating entirely separate pathways, the system achieves enhanced extraction efficiency without proportionally increasing device volume
4Manufacturing precision
If the filter chamber is isolated with multiple valves, then the purification quality improves, but the device complexity and production cost increase
Solution Approach 1:
The filter chamber is extracted as a distinct, isolatable module with dedicated filter valves that separate it from the rest of the channel system. This extraction allows the filter chamber to be manufactured and assembled as a separate component, potentially simplifying production through modular assembly while maintaining high purification quality through effective isolation
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
This configuration enables high-yield extraction and purification of sample constituents, such as nucleic acids, with reduced material consumption and compact design, supporting automated and efficient microfluidic processing.
Implementation Method 1
a pumping device, which is arranged in the pumping branch and is intended for producing a fluidic flow in the channel system
Implementation Method 2
at least one filter chamber, which is arranged in the filtering branch and is intended for accommodating a filter element
Data Source
AI summary
A microfluidic treatment apparatus has a microfluidic channel system having a filtering branch, a pumping branch connected in parallel with the filtering branch, and a filter chamber arranged in the filtering branch and configured to accommodate a filter element. The filtering branch is coupled to a channel inlet via a first channel-crossover element and to a channel outlet via a second channel-crossover element, and the filter chamber can be isolated from the rest of the channel system by at least two filter valves. A pumping device is arranged in the pumping branch, is configured to produce fluid flow in the channel system, and includes at least one pumping valve and at least one pumping chamber. The pumping branch is coupled to the channel inlet via a connection of the first channel-crossover element and to the channel outlet via a connection of the second channel-crossover element