The shear rate dependence of platelet aggregation geometries is investigated using a combination of in vitro and numerical experiments. Changes in upstream shear rate, γPw, are found to cause systematic changes in mature platelet aggregation geometries. However, γPw is not the only factor determining the shear rate experienced by a platelet moving over, and adhering to, a platelet aggregation: flow simulations demonstrate that naturally occurring variations in platelet aggregation geometry cause the local shear rate on the surface of a mature platelet aggregation to vary between zero and up to eight times γPw. Additionally, as a platelet aggregation grows, systematic changes in geometry are found, indicating that the local shear field over a growing platelet aggregation will differ from that over mature platelet aggregations.
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The authors gratefully acknowledge access to the facilities of the Australian Centre for Blood Disease (ACBD) and support from the ARC under Discovery grant DP0987643.
Author information Authors and AffiliationsFluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, 3800, Australia
Elham Tolouei, Christopher J. Butler, Andreas Fouras, Kris Ryan, Gregory J. Sheard & Josie Carberry
Division of Biological Engineering, Faculty of Engineering, Monash University, Melbourne, VIC, 3800, Australia
Elham Tolouei & Andreas Fouras
Correspondence to Josie Carberry.
Additional informationAssociate Editor Konstantinos Konstantopoulos oversaw the review of this article.
About this article Cite this articleTolouei, E., Butler, C.J., Fouras, A. et al. Effect of Hemodynamic Forces on Platelet Aggregation Geometry. Ann Biomed Eng 39, 1403–1413 (2011). https://doi.org/10.1007/s10439-010-0239-4
Received: 25 November 2010
Accepted: 23 December 2010
Published: 04 January 2011
Issue Date: May 2011
DOI: https://doi.org/10.1007/s10439-010-0239-4
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