Vortex sorting of rare particles/cells in microcavities: A review

Area of Science:

• Biotechnology
• Microfluidics
• Cell Separation

Background:

• Microfluidics and lab-on-a-chip technologies are crucial for separating target particles and cells from complex mixtures.
• Vortex sorting in microcavities is a key passive method for isolating rare cells, including circulating tumor cells (CTCs).
• This technique leverages fluid forces and inertial effects for label-free, high-throughput cell isolation.

Purpose of the Study:

• To review fundamental research on particle focusing, trapping, and holding mechanisms in microfluidic vortex sorting.
• To discuss novel microcavity designs for enhanced particle and cell separation.
• To explore the applications of vortex sorting in biological and medical fields.

Main Methods:

• Review of fundamental fluid dynamics and inertial focusing principles.
• Analysis of microcavity designs for generating vortex flow.
• Compilation of studies on particle and cell sorting using vortex dynamics.

Main Results:

• Vortex sorting effectively achieves label-free, high-throughput isolation of target cells.
• Understanding of particle focusing and trapping mechanisms is crucial for optimizing designs.
• Demonstrated applications in isolating rare cells like CTCs from biological samples.

Conclusions:

• Microfluidic vortex sorting is a promising technique for rare cell isolation.
• Further research into microcavity design and fundamental mechanisms will enhance its capabilities.
• The technique holds significant potential for advancing medical diagnostics and biological research.