Biomedical Microdevices

, Volume 9, Issue 5, pp 675–679 | Cite as

Integrated siphon-based metering and sedimentation of whole blood on a hydrophilic lab-on-a-disk

  • J. SteigertEmail author
  • T. Brenner
  • M. Grumann
  • L. Riegger
  • S. Lutz
  • R. Zengerle
  • J. Ducrée


In this paper, we present a novel and fully integrated centrifugal microfluidic “lab-on-a-disk” for rapid colorimetric assays in human whole blood. All essential steps comprising blood sampling, metering, plasma extraction and the final optical detection are conducted within t = 150 s in passive, globally hydrophilized structures which obviate the need for intricate local hydrophobic surface patterning. Our technology features a plasma extraction structure (V = 500 nL, CV < 5%) where the purified plasma (c RBC < 0.11%) is centrifugally separated, metered by an overflow and subsequently extracted by a siphon-based principle through a hydrophilic extraction channel into the detection chamber.


Centrifugal microfluidics Siphon Sedimentation Metering Sample preparation Whole blood 



The authors are grateful to the partial support by the Ministry of Science, Research and the Arts of the German federal state of Baden-Wuerttemberg (contract 24-720.431-1-7/2) and the good cooperation with Jobst-Technologies.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • J. Steigert
    • 1
    Email author
  • T. Brenner
    • 1
  • M. Grumann
    • 1
  • L. Riegger
    • 1
  • S. Lutz
    • 1
  • R. Zengerle
    • 1
    • 2
  • J. Ducrée
    • 2
  1. 1.Laboratory for MEMS Applications, Department for Microsystems Engineering (IMTEK)University of FreiburgFreiburgGermany
  2. 2.HSG-IMITVillingen-SchwenningenGermany

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