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Staged Inertial Microfluidic Focusing for Complex Fluid Enrichment.
Amy E Reece1, Kaja Kaastrup2, Hadley D Sikes2
1University of Wyoming, Department of Chemical & Petroleum Engineering.
RSC Advances
|July 18, 2015
Summary
Microfluidic inertial focusing uses fluid forces to align particles and cells. Staged devices with varied channel geometries enable high-throughput concentration and enrichment for point-of-care applications.
Area of Science:
- Biotechnology
- Microfluidics
- Cellular Biology
Background:
- Microfluidic inertial focusing passively aligns particles using fluid forces.
- Previous studies focused on straight channels, limiting throughput and efficiency.
- Particle behavior is sensitive to channel size, geometry, and particle dimensions.
Purpose of the Study:
- To develop a staged microfluidic device for high-throughput particle and cell concentration.
- To improve single-pass complex fluid enrichment efficiency.
- To demonstrate the device's utility for point-of-care applications.
Main Methods:
- Combining straight and asymmetrically curved microchannels in series.
- Investigating single and multiple pass concentration efficiency.
- Performing an on-chip fluorescence staining assay.
Main Results:
- Staged devices accelerate focusing dynamics and improve concentration efficiency.
- The microfluidic system is suitable for routine cell handling and buffer exchange.
- On-chip staining assay achieved results comparable to centrifugation with minimal sample loss.
Conclusions:
- Staged microfluidic devices offer efficient, high-throughput particle and cell concentration.
- This technology is ideal for point-of-care settings due to its practicality and cost-effectiveness.
- The developed device integrates sample preparation steps, reducing processing time.
