Shear-induced platelet margination in a microchannel.
Phys Rev E Stat Nonlin Soft Matter Phys
; 83(6 Pt 1): 061924, 2011 Jun.
Article
in En
| MEDLINE
| ID: mdl-21797420
ABSTRACT
The lateral migration of platelets in a microchannel is studied numerically where the hydrodynamic interactions between red cells, platelets, and vessel walls are resolved by the Stokes flow boundary integral equations. The simulations provide a clear physical description of the expulsion of the platelets by the velocity fluctuations in the core cellular flow toward the cell-depleted layer near the wall. The lateral migration is shown to be diffusional, and we further demonstrate, in agreement with previous experiments, that the diffusivity scales sublinearly with the shear rate if the relevant capillary number, Ca<1, as a result of its intrinsic dependence on the deformation of red cells.
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Database:
MEDLINE
Main subject:
Blood Platelets
/
Cell Movement
/
Microvessels
/
Mechanical Phenomena
/
Models, Biological
Language:
En
Journal:
Phys Rev E Stat Nonlin Soft Matter Phys
Journal subject:
BIOFISICA
/
FISIOLOGIA
Year:
2011
Type:
Article
Affiliation country:
United States