Microfluidic Sample Partitioning With Pressure-Driven Droplet Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Biological analysis and nucleic acid sequencing processes require complex multi-step workflows, leading to variability and contamination risks due to user intervention and environmental factors, which can impact data accuracy.
Innovation Solution
An integrated system comprising a microfluidic device with parallel channel networks, inlet and outlet reservoirs, and a holder with a hinged lid for orienting the device at a controlled angle, along with a pressure differential instrument to facilitate fluid movement and partitioning of reagents into discrete droplets for efficient sample preparation and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple highly diverse unit operations are performed manually in complex workflows, then flexibility and adaptability are maintained, but user intervention introduces variability and contamination risks that worsen data accuracy
Solution Approach 1:
The system segments the complex multi-step workflow into distinct modular units (extraction module, purification module, amplification module, library preparation module, sequencing module), each handling a specific function. This segmentation allows automated execution of each step while maintaining overall workflow flexibility, thereby improving data accuracy by eliminating manual intervention variability.
Solution Approach 2:
The patent introduces automated robotic systems and pre-prepared reagent kits as intermediaries between the user and the complex workflow steps. These intermediaries execute the diverse unit operations automatically according to pre-programmed protocols, reducing direct user intervention while maintaining workflow adaptability through programmable control.
2Reliability
If manual handling and user intervention are used in sample processing, then ease of operation is maintained, but opportunities for contamination and adulteration increase that impact data accuracy
Solution Approach 1:
The system merges multiple processing steps into integrated automated modules that operate within closed systems. For example, the extraction and purification modules are combined to process samples continuously without manual transfer, eliminating exposure to environmental contaminants. The automated liquid handling systems perform multiple operations within sealed environments, maintaining sample purity while requiring minimal user intervention.
Solution Approach 2:
The patent employs controlled environments including sterile chambers and sealed processing zones that create protective barriers against contamination. Samples and reagents are processed in closed systems that prevent exposure to external contaminants, while automated systems maintain these protective environments throughout the workflow.
3Manufacturing precision
If complex multi-step workflows are executed with frequent user intervention, then adaptability to different protocols is maintained, but environmental factors and user variability worsen process consistency
Solution Approach 1:
The system employs dynamically controllable automated modules that can adjust parameters such as temperature, pressure, and flow rates according to pre-programmed protocols. Each module can be independently controlled to match specific protocol requirements while maintaining consistent execution. The robotic systems can be reprogrammed to execute different workflows, providing adaptability without compromising execution precision.
Solution Approach 2:
The patent implements continuous automated processing where samples flow through integrated modules without interruption or manual handling. The automated systems maintain continuous operation from extraction through sequencing library preparation, eliminating pauses and transfers that could introduce variability. This continuous automated action ensures consistent process conditions while protocols can be changed by updating control software.
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 system enhances the accuracy and efficiency of nucleic acid sequencing by minimizing user intervention and environmental impacts, ensuring precise sample processing and reducing contamination risks through controlled fluid handling and partitioning.
Implementation Method 1
an instrument configured to receive the holder and apply a pressure differential between the plurality of inlet and outlet reservoirs to drive fluid movement within the channel networks
Implementation Method 2
an aqueous phase containing at least one of the reagents is combined with a stream of a non-aqueous fluid to partition the aqueous phase into discrete droplets within the non-aqueous fluid
Data Source
AI summary
An integrated system for processing and preparing samples for analysis may include a microfluidic device including a plurality of parallel channel networks for partitioning the samples including various fluids, and connected to a plurality of inlet and outlet reservoirs, at least a portion of the fluids comprising reagents, a holder including a closeable lid hingedly coupled thereto, in which in a closed configuration, the lid secures the microfluidic device in the holder, and in an open configuration, the lid is a stand orienting the microfluidic device at a desired angle to facilitate recovery of partitions or droplets from the partitioned samples generated within the microfluidic device, and an instrument configured to receive the holder and apply a pressure differential between the plurality of inlet and outlet reservoirs to drive fluid movement within the channel networks.