Results 251 to 260 of about 1,363,934 (319)
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Effects of blood donation on cerebral blood flow velocity
Transfusion, 1990Eighteen healthy male blood donors, nine with hematocrit (Hct) of 0.40 to 0.45 (normal Hct) and nine with Hct of 0.49 to 0.52 (upper‐limit Hct), were monitored by continuous‐wave internal carotid Doppler sonography and hematologic tests for 28 days after blood donation, to ascertain whether and to what extent a single standard donation may modify the ...
Alberto Zanella +6 more
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The Effect of Remifentanil on Cerebral Blood Flow Velocity
Anesthesia & Analgesia, 1998In the present study, we investigated the effect of remifentanil on cerebral blood flow velocity (CBFV). We investigated 20 patients (ASA physical status III) scheduled for elective coronary artery bypass graft surgery. Anesthesia was induced with remifentanil 5 microg/kg IV (Group 1, n = 10) or 2 microg/kg IV (Group 2, n = 10) and was maintained with ...
Andrea Paris +4 more
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Investigative Ophthalmology and Visual Science, 2012
PURPOSE The present experiments were undertaken to evaluate the validity of absolute flow velocity measurements with a dual-beam bidirectional Doppler Fourier-domain optical coherence tomography (FD-OCT) system.
R. Werkmeister +8 more
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PURPOSE The present experiments were undertaken to evaluate the validity of absolute flow velocity measurements with a dual-beam bidirectional Doppler Fourier-domain optical coherence tomography (FD-OCT) system.
R. Werkmeister +8 more
semanticscholar +1 more source
Noninvasive Blood Flow Velocity Determination
2019 19th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering (ISEF), 2019Electromagnetic flow meter method is proposed for non-invasive vascular measurements. A forward 3D electromagnetic, finite element method model is developed. The model employs the anatomically precise geometrical model of human leg with known blood flow speed in its vessels and tissue electrical conductivities.
Valentin Mateev, Iliana Marinova
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Blood flow velocity in pulmonary microvessels of bullfrog
Respiration Physiology, 1979Flow velocity in the pulmonary microvessels of the exposed lung of bullfrogs was measured by means of a laser Doppler microscope of an oblique backward mode, together with a signal-analyzing system having a time sharing circuit triggered by the R-wave of the ECG.
Tomiyasu Koyama +4 more
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Effect of Adenosine on Cerebral Blood Flow Velocity
Journal of Neuroimaging, 2001ABSTRACTBackground and Purpose. Evidence suggests that adenosine (ADN) is a potent vasodilator of cerebral vessels. However, the feasibility of manipulating human cerebral vascular resistance with AND has not been assessed by means of TCD. The purpose of this study was to quantitatively estimate the change in middle cerebral artery cerebral blood flow ...
Alexander Y. Razumovsky +4 more
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Blood flow velocity in stenosed artery
AIP Conference Proceedings, 2013Stenosis is an occlusion of the blood vessels due to the accumulation of cholesterol, fat and the abnormal growth of tissue at the arterial wall. The regional blood rheology is altered once a stenosis develops in the artery. This is due to the presence of stenosis which is one of the factors that cause problem in blood circulation system.
Izyan Syazana Awaludin +1 more
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Effect of Pentoxifylline on Microvascular Blood Flow Velocity
Angiology, 1981Pentoxifylline (PF), known to increase red blood cell (RBC) deformability, has recently attracted much attention because of its possible effect of reducing capillary resistance. There has been practically no reliable demonstration of an increase in capillary blood flow by this drug.
Norio Ohshima, M. Sato
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The Physics of Fluids, 2019
In this work, we present a two-phase model of blood flow through a porous layered artery in the presence of a uniform magnetic field. The characteristic of suspensions in blood allows us to assume blood as a micropolar fluid in the core region and plasma
Sneha Jaiswal, P. Yadav
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In this work, we present a two-phase model of blood flow through a porous layered artery in the presence of a uniform magnetic field. The characteristic of suspensions in blood allows us to assume blood as a micropolar fluid in the core region and plasma
Sneha Jaiswal, P. Yadav
semanticscholar +1 more source
Velocity Profile Determination for Flowing Blood
Review of Scientific Instruments, 1965An apparatus for determining the local stream velocity in flowing blood is described. Neutral buoyancy pellets are employed as tracers. Direct x-ray photographs, obtained with an automatic indexing, multiple-exposure camera, provide time-displacement data of the ensuing tracer motion.
Leon Bennett +2 more
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