| Asymmetry of blood flow and cancer cell adhesion in a microchannel with symmetric bifurcation and confluence. | |
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MedLine Citation:
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PMID: 20960063 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Bifurcations and confluences are very common geometries in biomedical microdevices. Blood flow at microchannel bifurcations has different characteristics from that at confluences because of the multiphase properties of blood. Using a confocal micro-PIV system, we investigated the behaviour of red blood cells (RBCs) and cancer cells in microchannels with geometrically symmetric bifurcations and confluences. The behaviour of RBCs and cancer cells was strongly asymmetric at bifurcations and confluences whilst the trajectories of tracer particles in pure water were almost symmetric. The cell-free layer disappeared on the inner wall of the bifurcation but increased in size on the inner wall of the confluence. Cancer cells frequently adhered to the inner wall of the bifurcation but rarely to other locations. Because the wall surface coating and the wall shear stress were almost symmetric for the bifurcation and the confluence, the result indicates that not only chemical mediation and wall shear stress but also microscale haemodynamics play important roles in the adhesion of cancer cells to the microchannel walls. These results provide the fundamental basis for a better understanding of blood flow and cell adhesion in biomedical microdevices. |
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Authors:
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Takuji Ishikawa; Hiroki Fujiwara; Noriaki Matsuki; Takefumi Yoshimoto; Yohsuke Imai; Hironori Ueno; Takami Yamaguchi |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biomedical microdevices Volume: 13 ISSN: 1572-8781 ISO Abbreviation: Biomed Microdevices Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100887374 Medline TA: Biomed Microdevices Country: United States |
Other Details:
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Languages: eng Pagination: 159-67 Citation Subset: IM |
Affiliation:
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Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan, ishikawa@pfsl.mech.tohoku.ac.jp. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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