scholarly journals Analysis of renal blood flow and renal volume in normal fetuses and in fetuses with a solitary functioning kidney

2017 ◽  
Vol 37 (12) ◽  
pp. 1213-1218
Author(s):  
An Hindryckx ◽  
Anke Raaijmakers ◽  
Elena Levtchenko ◽  
Karel Allegaert ◽  
Luc De Catte
Keyword(s):  
Blood Flow ◽  
Renal Blood Flow ◽  
Renal Volume ◽  
Solitary Functioning Kidney ◽  
Functioning Kidney

scholarly journals Renal hemodynamics and fatty acid uptake: effects of obesity and weight loss

2019 ◽  
Vol 317 (5) ◽  
pp. E871-E878 ◽  
Author(s):  
Eleni Rebelos ◽  
Prince Dadson ◽  
Vesa Oikonen ◽  
Hidehiro Iida ◽  
Jarna C. Hannukainen ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Blood Flow ◽  
Cardiac Output ◽  
Fatty Acid ◽  
Renal Blood Flow ◽  
Renal Hemodynamics ◽  
Renal Volume ◽  
Obese Subjects ◽  
Total Renal Blood Flow

Human studies of renal hemodynamics and metabolism in obesity are insufficient. We hypothesized that renal perfusion and renal free fatty acid (FFA) uptake are higher in subjects with morbid obesity compared with lean subjects and that they both decrease after bariatric surgery. Cortical and medullary hemodynamics and metabolism were measured in 23 morbidly obese women and 15 age- and sex-matched nonobese controls by PET scanning of [15O]-H2O (perfusion) and 14( R,S)-[18F]fluoro-6-thia-heptadecanoate (FFA uptake). Kidney volume and radiodensity were measured by computed tomography, cardiac output by MRI. Obese subjects were re-studied 6 mo after bariatric surgery. Obese subjects had higher renal volume but lower radiodensity, suggesting accumulation of water and/or lipid. Both cardiac output and estimated glomerular filtration rate (eGFR) were increased by ~25% in the obese. Total renal blood flow was higher in the obese [885 (317) (expressed as median and interquartile range) vs. 749 (300) (expressed as means and SD) ml/min of controls, P = 0.049]. In both groups, regional blood perfusion was higher in the cortex than medulla; in either region, FFA uptake was ~50% higher in the obese as a consequence of higher circulating FFA levels. Following weight loss (26 ± 8 kg), total renal blood flow was reduced ( P = 0.006). Renal volume, eGFR, cortical and medullary FFA uptake were decreased but not fully normalized. Obesity is associated with renal structural, hemodynamic, and metabolic changes. Six months after bariatric surgery, the hemodynamic changes are reversed and the structural changes are improved. On the contrary, renal FFA uptake remains increased, driven by high substrate availability.

Determination of renal blood flow by thermodilution method

1978 ◽  
Vol 38 (5) ◽  
pp. 495-499 ◽  
Author(s):  
Torbjörn Leivestad ◽  
Erling Brodwall ◽  
Svein Simonsen
Keyword(s):  
Blood Flow ◽  
Renal Blood Flow ◽  
Thermodilution Method

Measurement of Renal Blood Flow by 131I-Labelled Sodium Iodohippurate Imaging in a Rat Model of Herpes Encephalitis

1990 ◽  
Vol 31 (5) ◽  
pp. 538-539
Author(s):  
G. M. Cleator ◽  
P. E. Klapper ◽  
A. G. Lewis ◽  
H. L. Sharma ◽  
A. M. Smith
Keyword(s):  
Blood Flow ◽  
Renal Blood Flow ◽  
Rat Model ◽  
Herpes Encephalitis

scholarly journals Risk stratification for children with a solitary functioning kidney

2021 ◽  
Author(s):  
Sander Groen in’t Woud ◽  
Loes F. M. van der Zanden ◽  
Michiel F. Schreuder
Keyword(s):  
Risk Stratification ◽  
Solitary Functioning Kidney ◽  
Functioning Kidney

Bias and Precision in Magnetic Resonance Imaging‐Based Estimates of Renal Blood Flow: Assessment by Triangulation

2021 ◽  
Author(s):  
Bashair A. Alhummiany ◽  
David Shelley ◽  
Margaret Saysell ◽  
Maria‐Alexandra Olaru ◽  
Bernd Kühn ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Renal Blood Flow ◽  
Resonance Imaging

scholarly journals Recurrent clot anuria following laparoscopic pyeloplasty in a solitary functioning kidney: managing with double guide wire technique

2014 ◽  
Vol 2014 (dec24 1) ◽  
pp. bcr2014206205-bcr2014206205 ◽  
Author(s):  
S. Kumar ◽  
S. Singh ◽  
K. M. Parmar ◽  
N. Garg
Keyword(s):  
Guide Wire ◽  
Laparoscopic Pyeloplasty ◽  
Solitary Functioning Kidney ◽  
Functioning Kidney

Renal blood flow, early distal sodium, and plasma renin concentrations during osmotic diuresis

2000 ◽  
Vol 279 (4) ◽  
pp. R1268-R1276 ◽  
Author(s):  
Paul P. Leyssac ◽  
Niels-Henrik Holstein-Rathlou ◽  
Ole Skøtt
Keyword(s):  
Blood Flow ◽  
Renal Blood Flow ◽  
Sodium Excretion ◽  
Plasma Renin ◽  
Urine Flow ◽  
Sodium Reabsorption ◽  
Osmotic Diuresis ◽  
Nacl Concentration ◽  
Proximal Tubular ◽  
Distal Tubules

Inconsistencies in previous reports regarding changes in early distal NaCl concentration (EDNaCl) and renin secretion during osmotic diuresis motivated our reinvestigation. After intravenous infusion of 10% mannitol, EDNaCl fell from 42.6 to 34.2 mM. Proximal tubular pressure increased by 12.6 mmHg. Urine flow increased 10-fold, and sodium excretion increased by 177%. Plasma renin concentration (PRC) increased by 58%. Renal blood flow and glomerular filtration rate decreased, however end-proximal flow remained unchanged. After a similar volume of hypotonic glucose (152 mM), EDNaClincreased by 3.6 mM, ( P < 0.01) without changes in renal hemodynamics, urine flow, sodium excretion rate, or PRC. Infusion of 300 μmol NaCl in a smaller volume caused EDNaCl to increase by 6.4 mM without significant changes in PRC. Urine flow and sodium excretion increased significantly. There was a significant inverse relationship between superficial nephron EDNaCl and PRC. We conclude that EDNa decreases during osmotic diuresis, suggesting that the increase in PRC was mediated by the macula densa. The results suggest that the natriuresis during osmotic diuresis is a result of impaired sodium reabsorption in distal tubules and collecting ducts.

scholarly journals Extraction Methods for the Determination of Regional Renal Blood Flow

1979 ◽  
Vol 84 (2) ◽  
pp. 163-171 ◽  
Author(s):  
A.-C. Ericson ◽  
M. Sjöquist ◽  
H. R. Ulfendahl
Keyword(s):  
Blood Flow ◽  
Renal Blood Flow ◽  
Extraction Methods ◽  
Regional Renal Blood Flow
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