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Related Experiment Video

Updated: Jul 10, 2026

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology
13:59

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Small volume low mechanical stress cytometry using computer-controlled Braille display microfluidics.

Yi-Chung Tung1, Yu-suke Torisawa, Nobuyuki Futai

  • 1Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2099, USA.

Lab on a Chip
|October 26, 2007
PubMed
Summary

This study presents a novel micro flow cytometer system for analyzing precious, low-cell-number samples. The device uses Braille pins for fluid control and a microscope for detection, ensuring efficient and non-damaging cell analysis.

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Cell Biology

Background:

  • Traditional flow cytometry requires large cell numbers.
  • Precious cell samples, such as those from single embryoid bodies, are difficult to analyze.
  • Existing microfluidic systems may not offer efficient sample loading or non-damaging manipulation.

Purpose of the Study:

  • To develop a micro flow cytometer system for efficient and non-damaging analysis of small, precious cell samples.
  • To utilize Braille display pins for precise microfluidic manipulation.
  • To enable cell cycle analysis and viability assessment on limited cell populations.

Main Methods:

  • Design and fabrication of a disposable polydimethylsiloxane (PDMS) microfluidic chip.
  • Integration of Braille display pins for peristaltic pumping and micro-scale fluid actuation.
  • Employment of a fluorescence microscope with a CCD camera for optical detection.
  • Characterization using computational fluid dynamics (CFD) simulations and experimental validation with fluorescein, fluorescent beads, and cell lines (C2C12, HL60).

Main Results:

  • Demonstrated efficient sample loading for low cell numbers using a funnel design.
  • Validated non-damaging cell handling through viability studies on C2C12 cells.
  • Successfully performed cell cycle analysis on HL60 cells.
  • Showcased the system's capability by analyzing cells from a single mouse embryoid body.

Conclusions:

  • The developed micro flow cytometer is effective for analyzing small and precious cell samples.
  • The system offers a user-friendly solution for flow cytometric analysis with minimal sample requirements.
  • Potential for integration into multi-functional lab-on-a-chip devices for advanced cell manipulation.