Axisymmetric polydimethysiloxane microchannels for in vitro hemodynamic studies

Rui Lima, Monica Oliveira, T. Ishikawa, H. Kaji, S. Tanaka, M. Nishizawa, T. Yamaguchi

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Abstract

The current microdevices used for biomedical research are often manufactured using microelectromechanical systems (MEMS) technology. Although it is possible to fabricate precise and reproducible rectangular microchannels using soft lithography techniques, this kind of geometry may not reflect the actual physiology of the microcirculation. Here, we present a simple method to fabricate circular polydimethysiloxane (PDMS) microchannels aiming to mimic an in vivo microvascular environment and suitable for state-of-the-art microscale flow visualization techniques, such as confocal µPIV/PTV. By using a confocal µPTV system individual red blood cells (RBCs) were successfully tracked trough a 75 µm circular PDMS microchannel. The results show that RBC lateral dispersion increases with the volume fraction of RBCs in the solution, i.e. with the hematocrit.
Original languageEnglish
Article number035005
JournalBiofabrication
Volume1
Issue number3
DOIs
Publication statusPublished - Sep 2009

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Keywords

  • microchannels
  • polydimethysiloxane (PDMS)
  • flow visualisation

Cite this

Lima, R., Oliveira, M., Ishikawa, T., Kaji, H., Tanaka, S., Nishizawa, M., & Yamaguchi, T. (2009). Axisymmetric polydimethysiloxane microchannels for in vitro hemodynamic studies. Biofabrication, 1(3), [035005]. https://doi.org/10.1088/1758-5082/1/3/035005