Results 301 to 310 of about 324,321 (351)
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Retinal blood flow velocity in metabolic syndrome
Graefe's Archive for Clinical and Experimental Ophthalmology, 2013Metabolic syndrome (MetS) is characterized by obesity, insulin resistance, dyslipidemia, and hypertension. The Retinal Function Imager (RFI) is a new technique for measuring retinal blood-flow velocity. This study aims to compare retinal blood flow velocity between MetS and healthy subjects.Twenty eyes of 20 MetS males and 21 eyes of 21 aged-matched ...
Shay, Gutfreund +7 more
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Cerebral blood flow velocity in preterm neonates
Brain and Development, 1985The postnatal changes of cerebral blood flow velocity in 35 preterm neonates with or without complications were measured with a bidirectional Doppler flow meter. In the cases without complications, the pulsatility index for the anterior cerebral artery (ACA-PI) was high shortly after birth, and gradually decreased after 6 hrs as that in normal term ...
Y, Ando, S, Takashima, K, Takeshita
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Blood flow velocities in human intraplacental arteries
Acta Obstetricia et Gynecologica Scandinavica, 1994Objective. To characterise the physiological findings of blood circulation in intraplacental arteries in normal and complicated pregnancies.Design. A descriptive cross‐sectional study. Umbilical and intraplacental artery resistance index (RI) Doppler recordings during the last trimester of pregnancy.Subjects.
P, Kirkinen +3 more
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Estimating Blood Flow Velocity in Liver Vessels
2009Orthogonal polarization spectroscopy (OPS) is a technique for taking images to finally characterise microcirculation. Current image analysis algorithms have limitations when applied to image sequences obtained from the liver. We developed an automatic analysis tool which enables detection of liver vessels, measurement of vessel diameters, and ...
Müller, Michael +5 more
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Changes in Blood Flow Velocity Waveforms following Fetal Blood Sampling
Fetal Diagnosis and Therapy, 1995The umbilical artery, aorta, and middle cerebral artery pulsatility indices were investigated by pulsed Doppler ultrasound in 73 fetuses at 18-37 weeks of gestation, before and after fetal blood sampling performed either at the placental cord insertion (n = 46) or at the intrahepatic vein (n = 27).
C, Zoppini +5 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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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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Changes in chorioretinal blood flow velocity and cerebral blood flow after carotid endarterectomy
Japanese Journal of Ophthalmology, 2016To investigate the changes in chorioretinal blood flow velocity and cerebral blood after carotid endarterectomy (CEA).Nine patients with moderate to severe internal carotid artery stenosis underwent CEA. Chorioretinal blood flow velocity was measured by laser speckle flowgraphy (LSFG), while cerebral blood flow (CBF) was measured by single-photon ...
Hiroshi, Enaida +5 more
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2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121), 2002
In recent years, a new method to measure transverse blood flow, based on the decorrelation of the radio frequency (RF) signals has been introduced. We investigated the decorrelation characteristics of transverse blood flow using an intravascular ultrasound (IVUS) array catheter by means of computer modeling.
F.A. Lupotti, A.F.W. van der Steen
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In recent years, a new method to measure transverse blood flow, based on the decorrelation of the radio frequency (RF) signals has been introduced. We investigated the decorrelation characteristics of transverse blood flow using an intravascular ultrasound (IVUS) array catheter by means of computer modeling.
F.A. Lupotti, A.F.W. van der Steen
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Blood flow and blood velocity measurement in vivo by electromagnetic induction
Transactions of the Institute of Measurement and Control, 1982The application of electromagnetic induction to the measurement of blood flow and blood velocity in vivo is reviewed, The electronic requirements are discussed and the associated problems are surveyed. A brief account is given of Bevir's virtual current theory and its application to flow and velocity measuring devices.
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