Microfluidic Fluidic Interface Particle Separation
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Solution Overview
Problem
Current laboratory methods for viral and bacterial separation are slow, cumbersome, and not amenable to high-throughput processing, posing a risk of aerosolization and being inefficient in quickly isolating pathogens from complex samples, which is critical for rapid detection and characterization of bioengineered and emerging threats.
Innovation Solution
A continuous-flow, microfluidic-based separation system that employs diffusion, ultrasonic, electrophoretic, and dielectrophoretic forces to separate particles and toxins from sample fluids by forming a fluidic interface between the sample and buffer fluids, allowing for efficient separation and purification of biological species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If centrifugal motion is used to separate particles, then particles can be separated from sample fluid, but the process is slow and requires manual manipulation
Solution Approach 1:
The patent replaces mechanical centrifugal separation with a microfluidic system that uses controlled fluid flow and pressure gradients to achieve particle separation. The microfluidic chamber uses hydrodynamic forces and interface dynamics instead of high-speed rotation, enabling automated continuous processing while maintaining separation effectiveness.
Solution Approach 2:
The invention employs hydraulic principles by using fluid pressure gradients, flow rates, and fluid interface dynamics to drive particle separation. The system controls fluid flow through microfluidic channels to create conditions where particles of interest are selectively moved through interfaces, replacing mechanical centrifugation with controlled fluid mechanics.
2Measurement precision
If ultracentrifugation is used to separate viruses, then viral separation can be achieved, but aerosolization risk increases and equipment becomes bulky
Solution Approach 1:
The patent eliminates the need for ultracentrifugation by using a microfluidic separation system that processes samples in a closed, controlled environment. The system uses fluid dynamic forces and interface control to separate viruses without requiring high-speed rotation, thereby eliminating aerosolization risks associated with ultracentrifuge failure.
Solution Approach 2:
The microfluidic system uses thin film structures and closed channel walls to contain and control fluid flow. This allows for safe processing of pathogenic samples in a enclosed system that prevents aerosol generation, while the thin film interfaces enable precise control over particle separation conditions.
3Measurement precision
If batch procedures are used for viral separation, then viruses can be isolated, but processing time becomes very long
Solution Approach 1:
The patent implements continuous flow through the microfluidic chamber, allowing samples to be processed continuously rather than in batches. The system maintains steady-state flow conditions where particles are continuously separated and collected, dramatically reducing processing time compared to batch ultracentrifugation procedures that require complete cycle completion for each sample.
Solution Approach 2:
The system dynamically adjusts flow rates, pressure gradients, and fluid interface conditions in real-time to optimize separation efficiency. This dynamic control allows the system to adapt to different sample types and particle sizes, maintaining high processing speed while ensuring complete pathogen isolation across diverse biological samples.
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 rapid, efficient, and high-throughput separation of pathogens and toxins, minimizing damage to particles and allowing for quick identification and characterization, thus addressing the limitations of traditional methods and enhancing safety by reducing the risk of aerosolization.
Implementation Method 1
A continuous-flow, microfluidic-based separation system that employs diffusion, ultrasonic, electrophoretic, and dielectrophoretic forces to separate particles and toxins from sample fluids
Implementation Method 2
A continuous-flow, microfluidic-based separation system that employs diffusion, ultrasonic, electrophoretic, and dielectrophoretic forces to separate particles and toxins from sample fluids
Implementation Method 3
A continuous-flow, microfluidic-based separation system that employs diffusion, ultrasonic, electrophoretic, and dielectrophoretic forces to separate particles and toxins from sample fluids
Implementation Method 4
A continuous-flow, microfluidic-based separation system that employs diffusion, ultrasonic, electrophoretic, and dielectrophoretic forces to separate particles and toxins from sample fluids
Data Source
AI summary
Systems and methods for separating particles and/or toxins from a sample fluid. A method according to one embodiment comprises simultaneously passing a sample fluid and a buffer fluid through a chamber such that a fluidic interface is formed between the sample fluid and the buffer fluid as the fluids pass through the chamber, the sample fluid having particles of interest therein; applying a force to the fluids for urging the particles of interest to pass through the interface into the buffer fluid; and substantially separating the buffer fluid from the sample fluid.