Microfluidic Device with Pneumatic Pumping Network
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Solution Overview
Problem
Existing microfluidic analysis devices face challenges in efficiently processing sample materials due to complex network configurations and high reagent consumption, which can lead to increased costs and reduced reliability.
Innovation Solution
A pressure-based microfluidic device with a specifically configured network of active pneumatically controllable elements, featuring separable partial networks for purification and amplification, minimizes reagent consumption and enhances processing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a complex network configuration of active microfluidic elements is used, then processing capability is improved, but device complexity and reagent consumption increase
Solution Approach 1:
The microfluidic network is divided into separable partial networks (first partial network for purification, second partial network for amplification) that can be independently controlled and optimized. This segmentation reduces overall system complexity while maintaining processing capability through modular functionality.
Solution Approach 2:
The device employs dynamically controllable microfluidic elements including pneumatically actuated valves and pumping chambers that can be selectively activated based on processing requirements. This dynamic control allows the system to adapt network connectivity and flow paths, optimizing processing capability without requiring all elements to be permanently complex.
2Productivity
If a complex network configuration is used, then processing capability is improved, but reagent consumption increases
Solution Approach 1:
By separating the purification and amplification processes into distinct partial networks with dedicated functional modules, reagents are consumed only in the specific modules where they are needed, rather than being wasted throughout the entire complex network. The first partial network uses reagents for purification while the second uses reagents for amplification, optimizing reagent utilization.
Solution Approach 2:
The device incorporates a liquid storage module that can retain and reuse liquids after they have served their primary function. This allows recovery and reuse of reagents and buffers, significantly reducing overall reagent consumption while maintaining the processing capabilities of the complex network.
3Loss of substance
If separable partial networks are used, then reagent consumption is reduced, but device complexity increases
Solution Approach 1:
The separable partial networks are designed with universal functional modules that can serve multiple purposes. For example, the liquid storage module can store different liquids for different processing steps, and the pneumatic control system can manage multiple valve and pump combinations. This multi-functionality reduces the need for separate dedicated components, offsetting the complexity of having separable networks.
4Reliability
If precise control of microfluidic elements is implemented, then processing reliability is improved, but device complexity increases
Solution Approach 1:
The device uses a pneumatic control system with pressure sources that can be applied to multiple control connections simultaneously. This pneumatic approach provides precise and reliable control of microfluidic elements through pressure differentials, while using a single control mechanism (pneumatic pressure) rather than complex electronic or mechanical control systems for each element.
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 proposed configuration reduces reagent consumption, improves processing efficiency, and enhances reliability by allowing for precise control of microfluidic elements and separation of purification and amplification processes.
Implementation Method 1
a first pressure to the first microfluidic pumping chamber
Implementation Method 2
a second pressure to the second microfluidic pumping chamber... combined pressurization of the first microfluidic pumping chamber and aspiration with the second microfluidic pumping chamber to cause filtering of sample material
Data Source
AI summary
A microfluidic device for analyzing sample material is disclosed. The device features a microfluidic network. The network includes a first partial network for purifying sample material. In the first partial network, a first microfluidic pumping chamber and a second microfluidic pumping chamber are connected in series to a functional module for filtering sample material.