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Methods for pumping fluids on biomedical lab-on-a-chip.

Yong Luo1, Jianhua Qin, Bingcheng Lin

  • 1Laboratory of Microfluidics for Systems Biology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, Liaoning Province, P.R. China.

Frontiers in Bioscience (Landmark Edition)
|March 11, 2009
PubMed
Summary
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Lab-on-a-chip technology relies on microfluidic pumping systems for precise liquid handling in biomedical applications. This review covers electroosmosis and pressure-driven methods, highlighting their principles and uses in advancing point-of-care diagnostics and drug research.

Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Analytical Chemistry

Background:

  • Lab-on-a-chip (LOC) technology integrates laboratory functions onto a microscale device.
  • Effective fluid manipulation, particularly liquid pumping, is crucial for LOC functionality.
  • Advancements in microfluidic pumping are vital for applications in biology, drug research, and point-of-care diagnostics.

Purpose of the Study:

  • To review fluid pumping methods for biomedical lab-on-a-chip devices developed over the past decade.
  • To emphasize the basic principles and typical applications of these microfluidic pumping techniques.
  • To demonstrate the potential of microfluidics for broader scientific and medical fields.

Main Methods:

  • Review of established and emerging fluid pumping techniques for microfluidic systems.

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  • Categorization of methods based on fundamental principles, primarily electroosmosis and pressure-driven flow.
  • Analysis of various pressure generation methods: positive displacement, reciprocating displacement, gravity, surface tension, and centrifuging.

    • Main Results:

    • Electroosmosis and pressure-driven methods are the most prevalent techniques for fluid pumping in biomedical LOC devices.
    • Diverse pressure generation strategies offer flexibility for different microfluidic applications.
    • Numerous biomedical applications showcase the efficacy and potential of these microfluidic pumping systems.

    Conclusions:

    • Microfluidic pumping systems are indispensable for the operation of lab-on-a-chip devices.
    • A variety of pumping methods, including electroosmotic and pressure-based, provide essential capabilities for microfluidic applications.
    • The reviewed techniques highlight the significant potential of microfluidics in advancing biomedical research and diagnostics.