Results 211 to 220 of about 16,667 (245)

Graded alterations of RBC aggregation influence in vivo blood flow resistance

American Journal of Physiology-Heart and Circulatory Physiology, 2004
Although the effects of red blood cell (RBC) aggregation on low-shear rate blood viscosity are well known, the effects on in vivo flow resistance are still not fully resolved. The present study was designed to explore the in vivo effects of RBC aggregation on flow resistance using a novel technique to enhance aggregation: cells are covalently coated ...
Ozlem, Yalcin, Murat, Uyuklu, Jonathan K, Armstrong, Herbert J, Meiselman, Oguz K, Baskurt   +4 more
openaire   +2 more sources

Red blood cell (RBC) deformability, RBC aggregability and tissue oxygenation in hypertension.

Clinical hemorheology and microcirculation, 2000
Arterial hypertension could be considered a progressive ischaemic syndrome interesting the macro and the microcirculation. In order to improve the clinical and therapeutic approach to the treatment of arterial hypertension, research has centered on blood flow to evaluate the different components and their very intricate relationships influencing the ...
G, Cicco, A, Pirrelli
openaire   +1 more source

Peculiarities of RBC aggregation studied by double trap optical tweezers

SPIE Proceedings, 2010
Aggregation peculiarities of red blood cells (RBCs) in autologous plasma are studied using double trap optical tweezers technique. The positions of RBCs are controlled with submicrometer accuracy by two optical traps formed by strongly focused laser beams (λ=1064 nm).
Maria D. Khokhlova, Evgeny V. Lyubin, Alexander G. Zhdanov, Sofia Yu. Rykova, Tatyana N. Krasnova, Irina A. Sokolova, Andrey A. Fedyanin   +6 more
openaire   +1 more source

Effects of cyclodextrins on RBC aggregation and blood viscosity.

Clinical hemorheology and microcirculation, 2007
Cyclic oligomers of glucose, termed cyclodextrins (CDs), can contain 6 (alpha-CD), 7 (beta-CD) or 8 (gamma-CD) glucose units and are able to remove cholesterol from platelet membranes and decrease platelet aggregation. The present study was designed to examine the effects of these CDs on RBC aggregation and blood viscosity.
Yoshiharu, Toyama, Eszter, Pais, Herbert J, Meiselman, Tamas, Alexy   +3 more
openaire   +1 more source

Detection and characterization of red blood cell (RBC) aggregation with photoacoustics

SPIE Proceedings, 2012
Red blood cells (RBCs) aggregate in the presence of increased plasma fibrinogen and low shear forces during blood flow. RBC aggregation has been observed in deep vein thrombosis, sepsis and diabetes. We propose using photoacoustics (PA) as a non-invasive imaging modality to detect RBC aggregation.
Eno Hysi, Ratan K. Saha, Min Rui, Michael C. Kolios   +3 more
openaire   +1 more source

RBC Aggregation: More Important than RBC Adhesion to Endothelial Cells as a Determinant of In Vivo Blood Flow in Health and Disease

Microcirculation, 2008
ABSTRACTAlthough the shear‐dependent and reversible phenomenon of red blood cell (RBC) aggregation has been studied for decades, its role as a determinant of in vivo blood flow in both health and disease has not yet been fully documented. In this brief review, we present compelling arguments, supported by literature evidence, that in vivo flow dynamics
Oguz K, Baskurt, Herbert J, Meiselman
openaire   +2 more sources

Time dependent variation of human blood conductivity as a method for an estimation of RBC aggregation

Clinical Hemorheology and Microcirculation, 2008
Time variation of whole human blood conductivity and shear stresses were investigated at rectangular and trapezium-shaped Couette viscometric flow under electric field of 2 kHz. The kinetics of conductivity signals were recorded both under transient flow and after the complete stoppage of shearing at shear rates from 0.94 to 94.5 s
Nadia, Antonova, Pavel, Riha, Ivan, Ivanov   +2 more
openaire   +2 more sources

Frequency-Encoded MRI-CEST Agents Based on Paramagnetic Liposomes/RBC Aggregates

Nano Letters, 2014
Paramagnetic liposomes containing Dy-HPDO3A in their inner water compartment and carrying a residual positive charge on their outer surface have been electrostatically bound to the membrane of red blood cells (RBCs). These aggregates yield two chemical exchange saturation transfer (CEST) pools represented by liposomal water protons (LipoCEST) and ...
Giuseppe, Ferrauto, Enza, Di Gregorio, Simona, Baroni, Silvio, Aime   +3 more
openaire   +2 more sources

Peritubular capillary permeability and intravascular RBC aggregation after ischemia: effects of neutrophils

American Journal of Physiology-Renal Physiology, 1990
The influence of neutrophils on peritubular capillary permeability and intravascular red blood cell (RBC) aggregation after renal ischemia was studied in anesthetized Sprague-Dawley rats. Intraperitoneal administration of antineutrophil serum (ANS) reduced the number of neutrophils in the blood to 3% of normal.
P O, Hellberg, O T, Källskog, G, Ojteg, M, Wolgast   +3 more
openaire   +2 more sources

Some Rheological Considerations in Ischemic Cerebrovascular Disease — Blood Viscosity, RBC Aggregation, and RBC Zeta Potential

1987
It is well known that blood viscosity is one of the most important determinants of cerebral blood flow (CBF) in normal and diseased states. It is also well recognized that blood viscosity is mainly influenced by hematocrit (Hct), red blood cell (RBC) deformability, RBC aggregation, plasma proteins, and so on.
Y. Shinohara, M. Yamamoto, H. Saitoh, M. Yoshitoshi, H. Ohsuga, H. Hamano, S. Saitoh   +6 more
openaire   +1 more source