Microfluidic Biological Assay Apparatus with Pneumatic Fluid Control
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Solution Overview
Problem
Current microfluidic systems lack mechanisms for controlled manipulation of multiple fluids, are not modular, and struggle with end-point assays for detecting biologically active macromolecules like DNA, RNA, and proteins, leading to limitations in biological and chemical sample analysis, increased production costs, and manual errors in nucleic acid-based assays.
Innovation Solution
A self-contained, fully automated microfluidic-based biological assay apparatus with a housing, controllable reagent dispensing system, pneumatic manifold, and control system, enabling automated processing and analysis of nucleic acid samples, including real-time PCR for detecting target nucleic acid molecules with improved multiplexing capabilities and reduced contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional biochemical assays are performed with full scale bio-laboratory facilities, then sample preparation and purification can be achieved, but the apparatus size and facility requirements become excessively large
Solution Approach 1:
The patent segments the conventional large-scale biochemical assay process into integrated microfluidic modules that can be contained within a compact apparatus. The microfluidic system divides sample processing into discrete functional zones (lysis, purification, amplification, detection) that operate in miniaturized formats, eliminating the need for full-scale laboratory facilities while maintaining analytical quality
Solution Approach 2:
The patent implements nesting by integrating multiple assay functions within hierarchical microfluidic structures. Smaller microchannels and reaction chambers are nested within larger housing compartments, with microfluidic devices contained within portable apparatus units. This nested architecture allows complex biochemical processing to occur in progressively smaller scales, reducing facility requirements while preserving functional capability
2Volume of stationary object
If microfluidic systems are used for biological sample analysis, then apparatus size is reduced, but the ability to control and manipulate multiple fluids is lost
Solution Approach 1:
The patent employs pneumatic actuation systems integrated with microfluidic channels to control fluid flow, mixing, and reagent dispensing. Pneumatic valves and pumps embedded in the microfluidic device enable precise manipulation of multiple fluids through pressure differential control, maintaining operational capability while preserving miniaturized apparatus design
Solution Approach 2:
The patent implements multi-functional microfluidic components that can perform multiple operations (transport, mixing, separation, reaction) within single integrated structures. A single microfluidic device incorporates diverse functional elements that can handle different fluid types and operations, enabling versatile fluid manipulation in a compact format without requiring separate specialized components for each function
3Reliability
If conventional PCR procedures are performed in environmentally isolated facilities, then nucleic acid amplification can be achieved, but facility requirements and operational complexity increase
Solution Approach 1:
The patent merges sample preparation, purification, amplification, and detection functions into a single integrated microfluidic platform. By combining previously separate procedural steps and environmental containment requirements into one unified device, the system maintains reliable nucleic acid amplification while dramatically reducing facility complexity and operational procedures
Solution Approach 2:
The patent implements self-contained microfluidic devices with integrated reagent reservoirs, automated fluid handling, and built-in contamination prevention mechanisms. The device performs self-diagnosis and self-regulation of critical parameters, reducing the need for complex external facility support and simplified operational procedures while maintaining amplification reliability
4Adaptability or versatility
If manual nucleic acid-based assays are performed, then flexibility in assay design is maintained, but user error and contamination risks increase
Solution Approach 1:
The patent implements dynamically reconfigurable microfluidic circuits with programmable flow paths and adaptable reaction conditions. The system can be reprogrammed through software control to accommodate different assay protocols and experimental designs, providing flexibility equivalent to manual methods while maintaining automated precision that eliminates user error and reduces contamination through closed-system operation
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 apparatus facilitates efficient, automated, and customizable analysis of biological samples, reducing user error, contamination, and production costs while enhancing sensitivity and flexibility in detecting nucleic acid sequences, enabling rapid reconfiguration for various applications.
Implementation Method 1
a pneumatic manifold removably disposed in the housing in a space shared by the dispensing platform, removably coupled to a fluidic transport layer and a plurality of reservoirs
Implementation Method 2
an amplification reactor disposed in the fluidic transport layer... capable of amplifying a target nucleic acid sequence
Implementation Method 3
to use a sequence specific probe labeled with a fluorescent reporter that will only fluoresce when the probe hybridizes with the target sequence
Data Source
AI summary
A self-contained, fully automated, biological assay-performing apparatus includes a housing; a dispensing platform including a controllably-movable reagent dispensing system, disposed in the housing; a reagent supply component disposed in the housing; a pneumatic manifold removably disposed in the housing in a space shared by the dispensing platform, removably coupled to a fluidic transport layer and a plurality of reservoirs, wherein the fluidic transport layer, the reservoirs, and a test sample to be introduced therein are disposed in the housing in the space separate from the dispensing platform; a pneumatic supply system removably coupled to the pneumatic manifold in the housing in a space separate from the dispensing platform; and a control system coupled to at least one of the dispensing platform and the pneumatic supply system, disposed in the housing.