F240. An ultrasound doppler technique for in vitro estimation of red blood cell aggregation a specific hydraulic system simulating blood flow

Biorheology ◽  
1995 ◽  
Vol 32 (2-3) ◽  
pp. 359-360
Author(s):  
E KARAABETSOS ◽  
E AGGELOPOULOS ◽  
D KOUTSOURIS
Keyword(s):  
Blood Flow ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Hydraulic System ◽  
Cell Aggregation ◽  
Ultrasound Doppler ◽  
Doppler Technique ◽  
Red Blood Cell Aggregation ◽  
Ultrasound Doppler Technique

scholarly journals Red blood cell (RBC) aggregation and its influence on non-Newtonian nature of blood in microvasculature

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Chitra Murali ◽  
Perumal Nithiarasu
Keyword(s):  
Blood Flow ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Cell Aggregation ◽  
Time Dependent ◽  
Shear Rates ◽  
Red Blood Cell Aggregation ◽  
Significant Difference ◽  
Rbc Aggregation ◽  
Rouleaux Formation

AbstractA robust computational model is proposed to investigate the non-Newtonian nature of blood flow due to rouleaux formation in microvasculature. The model consists of appropriate forces responsible for red blood cell (RBC) aggregation in the microvasculature, tracking of RBCs, and coupling between plasma flow and RBCs. The RBC aggregation results have been compared against the available data. The importance of different hydrodynamic forces on red blood cell aggregation has been delineated by comparing the time dependent path of the RBCs. The rheological changes to the blood flow have been investigated under different shear rates and hematocrit values and quantified with and without RBC aggregation. The results obtained in terms of wall shear stress (WSS) and blood viscosity indicate a significant difference between Newtonian and powerlaw fluid assumptions.

Lysophosphatidic acid induced red blood cell aggregation in vitro

2012 ◽  
Vol 87 ◽  
pp. 89-95 ◽  
Author(s):  
Lars Kaestner ◽  
Patrick Steffen ◽  
Duc Bach Nguyen ◽  
Jue Wang ◽  
Lisa Wagner-Britz ◽  
...  
Keyword(s):  
Blood Cell ◽  
Lysophosphatidic Acid ◽  
Red Blood Cell ◽  
Cell Aggregation ◽  
Red Blood Cell Aggregation ◽  
Blood Cell Aggregation

Effects of increased plasma viscosity and red blood cell aggregation on blood viscosity in vivo

1981 ◽  
Vol 241 (4) ◽  
pp. H513-H518 ◽  
Author(s):  
L. Gustafsson ◽  
L. Appelgren ◽  
H. E. Myrvold
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Apparent Viscosity ◽  
Cell Aggregation ◽  
Plasma Viscosity ◽  
Pressure Flow ◽  
Red Blood Cell Aggregation ◽  
Rbc Aggregation

The effects of increased plasma viscosity and induced red blood cell (RBC) aggregation on apparent viscosity of blood in vivo in the skeletal muscle of the dog were studied. Apparent viscosity in vivo was determined in the isolated and vasodilated calf muscles of one hindlimb by comparing pressure-flow relationships for RBC suspensions with pressure-flow relationships for a Newtonian solution of known viscosity. RBC suspensions of increased plasma viscosity with and without RBC aggregation were obtained by substituting plasma with isoviscous solutions of high- and low-molecular-weight dextran in saline. Hematocrits of the suspensions were adjusted to either 45 or 60%. The viscosities of the suspensions in vitro were determined in a Wells-Brookfield viscometer. Apparent viscosity of blood in vivo was found to be mainly dependent on the viscosity of plasma. RBC aggregation had no significant influence on the viscosity in vivo.

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