Abstract
Computed duplex sonography was used to examine the renal arteries in 36 hypertensive children and adolescents (ages 4–17 years) with arterial hypertension of either renal or non-renal origin. Time-averaged flow velocities, maximum blood flow velocities as well as absolute renal blood flow and renal blood flow per gram kidney weight were measured. Normal flow velocities and normal to elevated renal blood flow volume was found in patients with acute glomerulonephritis and those with signs of chronic glomerulonephritis onset. Patients having advanced stages of chronic glomerulonephritis, on the other hand, were characterized by lower levels of all parameters. Unilateral renal artery stenosis was diagnosed correctly in four patients, although one intra-renal artery stenosis escaped imaging. Scarred kidneys exhibited low-normal or reduced flow velocities and renal blood flow volumes corresponded roughly to kidney size and preservation of normal kidney structure. Hypertension in some patients with normal kidneys showed a tendency to cause higher renal blood flow without consistent acceleration of blood flow velocities. We conclude that duplex sonography is a suitable primary diagnostic tool in measuring blood flow velocities and absolute renal blood flow volume in hypertensive children, thus facilitating the choice of the next diagnostic step.
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Abbreviations
- DS :
-
duplex sonography
- GN :
-
glomerulonephritis
- KW :
-
kidney weight
- RAST :
-
renal artery stenosis
- RBF :
-
renal blood flow
- RI :
-
resistance index
- TAV :
-
time average velocity
- V max :
-
maximum systolic velocity
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Rosendahl, W., Grunert, D. & Schöning, M. Duplex sonography of renal arteries as a diagnostic tool in hypertensive children. Eur J Pediatr 153, 588–593 (1994). https://doi.org/10.1007/BF02190666
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DOI: https://doi.org/10.1007/BF02190666