in the present study, the nonlinear model of non-newtonian blood flow in cosine-shape stenosed elastic artery is numerically examined. the model is carried out for axisymmetric, two-dimensional and fully developed blood flow. the vessel wall is assumed to be have time-dependent radius that is important factor for study of blood flow. the cosine-shape stenosis convert to rigid artery by using a ...

Red blood cells play a major role in body metabolism by supplying oxygen from the microvasculature to different organs and tissues. Understanding blood flow properties in microcirculation is an essential step towards elucidating fundamental and practical issues. Numerical simulations of a blood model under a confined linear shear flow reveal that confinement markedly modifies the properties of ...

We report new results on blood flow modeling over large volumes of cortical gray matter of primate brain. We propose a network method for computing the blood flow, which handles realistic boundary conditions, complex vessel shapes, and complex nonlinear blood rheology. From a detailed comparison of the available models for the blood flow rheology and the phase separation effect, we are able to ...

In this study the rheology of blood clot is measured with the help of rotational rheometer. Several shear strain (0.5, 1 and 2%) are applied with two frequencies (5 and 10 Hz) from the incipient time of clot formation and the response of the sample is measured with the form of shear stress and the phase lag which is interpreted with storage and loss moduli. In this study the ratio of loss to st...

We present a minimal microfluidic device that allows the study of whole blood rheology in vitro as a function of key biological and physical parameters. We apply this platform to the study of sickle cell disease, a condition for which there are no analytical tools capable of assessing disease severity or predicting treatment efficacy. We demonstrate that our system can distinguish blood samples...

The aggregation, dispersion and deformation of cellular components of blood in the vasculature affect blood rheology to a greater extent. At low shear rate erythrocytes tend to aggregate and form rouleaux and at a high shear rate they dis perse and get deformed into ellipsoid with their long axis aligned in the flow direction. While rouleaux formations increase viscosity, dispersion and deforma...

However, the use of the term parahemorheology has been criticized, because the prefix para implies that the rheology of fluids and structures in the perivascular spaces is secondary and less important than that of the vessel-blood organ. It is also imprecise, once it does not refer to the fluids and structures being considered. By contrast, the term perihemorheology implies the rheology of flui...

In a prospective randomized open study, 48 patients underwent coronary bypass operation using cardiopulmonary bypass (CPB), with the same type of membrane oxygenator. Twenty-fout,IJatients were oxygenated during CPB by high P02 level between 190 and 300 mmHg (H-POz) and in the remaining patients the P02 was maintained low between 75 and 112 mmHg (L-P02.) The groups were comparable regarding age...