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Methods of renal blood flow measurement
Urological Research, 1996Variations in regional renal blood flow have been implicated in a variety of disease states. Many techniques have been developed in an attempt to accurately assess these changes. The microsphere technique is the most widely used method at the present time.
John M. Fitzpatrick +4 more
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Renal Blood Flow in Moderate Hypothermia
Archives of Surgery, 1960Although there is general agreement that renal blood flow is depressed by body cooling, there is some disagreement concerning the extent of this alteration. These discrepancies may be related to the wide variation in the degree of hypothermia induced1,6,7,10,11,15and, more particularly, to the methods for measuring renal blood flow.13Some evidence has ...
Mario Onnis +2 more
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Autoregulation of renal blood flow in the rat
Pfl�gers Archiv European Journal of Physiology, 1977Renal blood flow was measured in rats anaesthetized with pentobarbital sodium by employing the PAH clearance method and the 133Xe washout technique. Both methods were in good agreement. In 17 rats a 25% decrement of blood pressure was attained through haemorrhage: RBF measured by PAH clearance declined by 3%, according to 133Xe washout by 2.7%.
J. Heller, Jana Hollyová
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Autoregulation of renal blood flow in the puppy
American Journal of Physiology-Legacy Content, 1975The ability of the immature kidney to autoregulate blood flow was investigated. Renal blood flow was measured by electromagnetic flowmeter. In six puppies, selective blockade of the intrarenal effects of angiotensin II (AII) by [1-sarcosine, 8-alanine]angiotensin II (anti-AII) administered into the renal artery did not change renal blood flow.
S B Montgomery +4 more
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Medical & Biological Engineering & Computing, 1991
Stimulation of the renal sympathetic nerve in young pigs with biphasic pulses of current (3 mA, 800 microseconds per phase, 5, 10 and 50 Hz) produced decreases in arterial and cortical blood flow in the kidney, with the greatest decreases occurring at the highest stimulus frequencies. The decrease in cortical flow lagged that in arterial flow by 1.53-1.
Spelman Fa, P. Å. Öberg
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Stimulation of the renal sympathetic nerve in young pigs with biphasic pulses of current (3 mA, 800 microseconds per phase, 5, 10 and 50 Hz) produced decreases in arterial and cortical blood flow in the kidney, with the greatest decreases occurring at the highest stimulus frequencies. The decrease in cortical flow lagged that in arterial flow by 1.53-1.
Spelman Fa, P. Å. Öberg
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1990
The microcirculation of the kidney is unique. Most organs are relatively homogeneously prefused by arteries and veins that are interconnected by a capillary bed that supplies oxygen and nutrients to the tissue. In contrast, the perfusion of the kidney is highly heterogeneous.
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The microcirculation of the kidney is unique. Most organs are relatively homogeneously prefused by arteries and veins that are interconnected by a capillary bed that supplies oxygen and nutrients to the tissue. In contrast, the perfusion of the kidney is highly heterogeneous.
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Aortic Stiffening, Aortic Blood Flow Reversal, and Renal Blood Flow
Hypertension, 2015See related article, pp 61–67 Normal arterial aging is characterized by arterial enlargement, wall thickening, and stiffening, which predominates at large arteries.1 Patients with chronic kidney disease (CKD) have an early vascular aging,2 characterized by an accelerated arterial enlargement and stiffening, which occurs in parallel with the decline ...
Elie Mousseaux +2 more
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Mechanism of Autoregulation of Renal Blood Flow
Nature, 1959IT has been noted by Winton1 and has since been confirmed many times2–5, that the renal vascular resistance is not constant but increases with increasing arterial pressure in the range 80–120 mm. mercury mean pressure. The phenomenon does not depend on an intact nerve supply to the kidney but occurs in the denervated, perfused kidney.
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Regional Renal Blood Flow in Ewes
American Journal of Veterinary Research, 1981SUMMARY Regional blood flow to the kidneys was measured in 6 ewes by injecting carbonized microspheres (15 μm ± 5) labeled with 85Sr into the left ventricle. There was no significant (P > 0.25) difference in the mean arterial pressure before and after injection of the microspheres.
V K, Reddy +3 more
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1984
Measurement of renal plasma and blood flows do not belong to the category of routine investigatory methods. In indicated cases these parameters can be measured using the “classical” method [renal clearance of paraaminohippuric acid(PAH)] or radionuclide methods.
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Measurement of renal plasma and blood flows do not belong to the category of routine investigatory methods. In indicated cases these parameters can be measured using the “classical” method [renal clearance of paraaminohippuric acid(PAH)] or radionuclide methods.
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