Systems and methods related to continuous flow droplet reaction
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Solution Overview
Problem
Existing nucleic acid quantitation methods, such as emulsion-based digital nucleic acid amplification, require manual sample preparation and reagent handling, which can lead to contamination, increased labor, and reduced accuracy due to manual errors and the need for laboratory settings.
Innovation Solution
A continuous-flow instrument system that integrates all components for emulsion-based digital nucleic acid amplification, including reagents and sample processing, allowing for automated, contamination-free analysis of nucleic acids with minimal pre-input processing, enabling rapid and accurate detection and quantitation at the point of care.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual sample preparation and reagent handling is used for emulsion-based digital nucleic acid amplification, then flexibility in sample processing is maintained, but contamination risk increases and measurement precision decreases due to manual errors
Solution Approach 1:
The system performs self-service by automatically handling sample preparation, reagent dispensing, and reaction processing without manual intervention. The automated liquid handling system precisely dispenses reagents and manages the entire workflow from sample input to data output, eliminating human error while maintaining measurement precision for nucleic acid quantification
Solution Approach 2:
Manual mechanical operations are replaced with automated liquid handling systems and integrated processing modules. The system uses automated injection mechanisms, temperature-controlled reaction chambers, and integrated detection systems to substitute manual sample preparation and reagent handling, thereby reducing contamination risk and improving measurement precision
2Productivity
If manual sample preparation is performed in laboratory settings, then comprehensive sample processing can be achieved, but analysis time increases and productivity decreases
Solution Approach 1:
The system segments the sample processing workflow into distinct automated modules: sample injection, reagent dispensing, reaction processing, and detection. Each module operates independently and rapidly, enabling parallel processing steps that significantly reduce total analysis time while maintaining comprehensive sample processing capabilities
Solution Approach 2:
The system maintains continuous useful action through automated workflows where samples move continuously through processing stages without interruption. The automated liquid handling system ensures reagents are dispensed continuously and reactions proceed without manual intervention delays, maximizing productivity and minimizing time loss
3Reliability
If manual reagent handling is required, then system flexibility is maintained, but human error increases and reliability decreases
Solution Approach 1:
The system achieves self-service automation where reagents are automatically dispensed and managed through integrated liquid handling mechanisms. The system tracks reagent volumes, manages expiration dates, and automatically adjusts dispensing parameters to ensure reaction consistency without human intervention, thereby improving reliability while the modular design keeps complexity manageable
Solution Approach 2:
The system incorporates feedback mechanisms that monitor reagent consumption, reaction progress, and system performance in real-time. Sensors detect changes in reaction conditions and automatically adjust parameters to maintain consistency, while the system logs all operations to ensure reproducibility and improve reliability through continuous quality control
4Reliability
If samples require pre-processing outside the device, then sample compatibility is improved, but contamination risk increases and reliability decreases
Solution Approach 1:
The system merges sample processing functions directly into the device by integrating pre-processing modules that perform nucleic acid extraction, purification, and preparation within the same closed system. This consolidation eliminates the need for external sample processing steps, maintaining sample integrity while reducing contamination risk through a closed, controlled environment
Solution Approach 2:
The system introduces an intermediary automated liquid handling system that manages the transition from sample input to reaction processing. This intermediary layer controls all sample handling through sealed pathways and automated mechanisms, preventing contamination while simplifying user interaction and maintaining sample integrity throughout the workflow
Data Source
AI summary
Described herein are systems relating to a continuous-flow instrument that includes all necessary components for digital droplet quantification without the need to introduce key reagents or collect and transfer droplets between stages of instrument operation. Digital quantification can proceed without any additional fluid or consumable handling and without exposing fluids to risk of external contamination.