A microfluidic flow analyzer with integrated lensed optical fibers.

Area of Science:

• Biomedical diagnostics
• Microfluidics
• Optical physics

Background:

• Rapid optical interrogation of flowing cells is crucial for biomedical diagnostics.
• Conventional methods often involve complex optics and high-speed cameras, limiting accessibility.
• There is a need for simpler, more portable, and cost-effective solutions.

Purpose of the Study:

• To develop a lab-scale, portable device for rapid optical analysis of flowing cells.
• To overcome the challenges associated with complex open-space optics and expensive equipment.
• To demonstrate a microfluidic platform integrated with on-chip fiber optics for enhanced cell interrogation.

Main Methods:

• Utilized a hydrodynamic flow-based microfluidic platform.
• Integrated on-chip lensed and non-lensed optical fibers for precision illumination.
• Employed a planar arrangement of optical fibers for multi-parametric analysis from a single interrogation point.

Main Results:

• Developed a portable, lab-scale prototype for cell analysis.
• Achieved precise optical analysis with high sensitivity using a lensed fiber.
• Successfully measured fluorescence signals from CD4 immunostained cells and human blood samples.
• Compared the performance of the developed microfluidic flow analyzer against a conventional flow cytometer.

Conclusions:

• The developed microfluidic device offers a promising alternative for rapid cell analysis in biomedical diagnostics.
• The integrated fiber optic approach simplifies the system, enhancing portability and potentially reducing costs.
• The platform demonstrates capability for sensitive, multi-parametric analysis, comparable to established flow cytometry methods.