Fluorescein transit tkne from pial arterioles to pial venules was measured in the mouse by analyzing motion pictures taken at 40 frames/sec. Increased blood pressure reduced the transit time. Increased blood viscosity lengthened the transit time. Viscosity was increased by rendering the animals polycythemic, or by infusions of high molecular weight dextran. Two different dexrrans were used. The...

Blood viscosity was studied during extracorporeal circulation by means of a cone in cone viscometer. This rotational viscometer provides sixteen kinds of shear rate, ranging from 0.05 to 250.2 sec-1 • Merits and demerits of the equipment were described comparing with the capillary viscometer. In experimental study it was well demonstrated that the whole blood viscosity showed the shear rate dep...

Plasma proteins and lipid profile influence whole blood fluidity through changes in plasma viscosity, red cell aggregability and deformation. In diseases like Cushing syndrome (CS) and diabetes mellitus (DM) plasma concentrations of fibrinogen, cholesterol, and triglycerides are increased, and, thus, blood rheology might be affected. Our aim was to determine parameters of blood fluidity in 26 d...

Objective: Research continues to show that being connected to the earth can increase the potential of the body to scavenge free radicals. This study examined the effect of just one hour of grounding on blood viscosity while subjects participated in gentle yoga exercises designed to initiate minor inflammation. Design: In this double blind model, twenty-eight (28) subjects met at the Bowerman Sp...

in this study, variations of the pasting properties, swelling power and solubility of two rice starches, low amylose (8.7%) and high amylose (26%) at two citric acid concentrations (0 and 0.01 m) was investigated. the results showed that the peak viscosity and breakdown viscosity of rice starch decreased significantly (p 0.05).the swelling power and solubility of both starch pastes with and wit...

background: blood viscosity and aortic sclerosis (as) are strong predictors of cardiovascular events. the effects of blood viscosity on as have not been studied adequately. we aimed to investigate the potential connection between whole blood viscosity (wbv) and as. methods:   as was detected by transthoracic echocardiography. the estimation of wbv was carried out at both high shear rate (hsr) (...

It has previously been shown that a high hemoglobin value, a major determinant of whole blood viscosity (WBV), 9 predicts cardiovascular events. One putative mechanism might be an impaired endothelial function. Erythrocyte deformability is 10 another rheologic feature of the erythrocyte being of importance for the flow properties of the blood, especially in the capillaries. 11 The present study...

We hypothesized that the response of cerebral blood flow (CBF) to changing viscosity would be dependent on "baseline" CBF, with a greater influence of viscosity during high-flow conditions. Plasma viscosity was adjusted to 1.0 or 3.0 cP in rats by exchange transfusion with red blood cells diluted in lactated Ringer solution or with dextran. Cortical CBF was measured by H(2) clearance. Two group...

The purpose was to investigate the effects of artificial cold air on cardiovascular risk in hypertensive subjects. An artificial cold air was simulated with hourly ambient temperature data of a real moderate cold air in China. Twenty-four male SHR rats were randomly divided into the minimum temperature (Tmin) group, the rewarming temperature (Tr) group and two concurrent control groups with six...