Integrated Microfluidic Device Pneumatic Control
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Solution Overview
Problem
Existing microfluidic systems lack mechanisms for controlled manipulation of multiple fluids, are not modular, and cannot easily detect interactions or existence of analytes, limiting their practicality in chemical or biological assays, and require extensive resources for sample preparation and analysis.
Innovation Solution
A microfluidic device with interconnected areas for sample preparation, nucleic acid amplification, and analysis, incorporating differential pressure sources, diaphragms, and fluid channels, allowing for automated processing and detection of biological molecules, including DNA, RNA, and proteins, using reagents like magnetic beads and silica membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional biochemistry and molecular biology apparatus are used, then sample preparation and analysis can be performed, but extensive physical process resources and full-scale bio-laboratory facilities are required
Solution Approach 1:
The patent divides the conventional large-scale bio-laboratory into integrated micro-scale functional modules including sample preparation area, nucleic acid amplification area, and detection area, all contained within a single microfluidic device that fits on a bench-top
Solution Approach 2:
The patent nests multiple functional operations (sample lysis, purification, amplification, and detection) within a hierarchical structure where smaller microfluidic channels and chambers are integrated into a compact device body, enabling complex workflows in a minimal footprint
2Ease of operation
If existing microfluidic systems are used, then fluid processing can be performed, but controlled manipulation of multiple fluids is lacking
Solution Approach 1:
The patent introduces pneumatic control channels as intermediary pathways that run alongside fluidic channels, using gas pressure variations to control fluid flow, mixing, and separation without direct mechanical intervention
Solution Approach 2:
The patent employs dynamic control of fluid flow through variable pneumatic pressure applied to elastomeric membranes, allowing real-time adjustment of flow rates, mixing intensity, and separation efficiency during assay operations
3Adaptability or versatility
If existing microfluidic devices are used, then specific assays can be performed, but the devices lack modularity and cannot be easily adapted for other applications
Solution Approach 1:
The patent designs a universal microfluidic platform with standardized pneumatic control interfaces and modular functional areas that can be configured for different assays (DNA extraction, PCR, detection) using the same basic device architecture and control system
Solution Approach 2:
The patent segments the device into interchangeable functional modules (sample preparation module, amplification module, detection module) that can be selectively activated or reconfigured for different applications without redesigning the entire system
4Difficulty of detecting and measuring
If existing microfluidic systems are used, then fluid processing can occur, but straightforward end-point assays for detecting analyte interactions are not available
Solution Approach 1:
The patent merges the amplification reaction chamber with the detection chamber, allowing the same microfluidic volume to serve both PCR amplification and subsequent visual or instrumental detection of nucleic acid products through integrated optical pathways
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 efficient, automated, and cost-effective analysis of biological samples with reduced resource requirements, providing modular and customizable solutions for various applications, including disease detection, with results comparable to traditional bench-top methods.
Implementation Method 1
incorporating differential pressure sources, diaphragms, and fluid channels
Implementation Method 2
using reagents like magnetic beads and silica membranes
Implementation Method 3
using reagents like magnetic beads and silica membranes
Data Source
AI summary
A microfluidic device for analyzing a sample of interest is provided. The microfluidic device can comprise a microfluidic device body, wherein the microfluidic device body comprises a sample preparation area, a nucleic acid amplification area, a nucleic acid analysis area, and a network of fluid channels. Each of the sample preparation area, the nucleic acid amplification area and the nucleic acid analysis area are fluidly interconnected to at least one of the other two areas by at least one of the fluid channels. Using the microfluidic device, sample preparation can be combined with amplification of a biologically active molecule, and a suitable biological sample can be provided for analysis and/or detection of a molecule of interest. The small-scale apparatus and methods provided are easier, faster, less expensive, and equally efficacious compared to larger scale equipment for the preparation and analysis of a biological sample.