Acute renal transplant rejection in children: assessment by Duplex Doppler sonography

Vergesslich, Klara A.; Khoss, A; Balzar, E; Schwaighofer, B.; Ponhold, W

doi:10.1007/bf00974083

Cited by 19 publications

(2 citation statements)

References 10 publications

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“…The renal resistive index (RI) of the renal artery, evaluated using colour Doppler ultrasonography, is considered one of the more reliable indices of renal vascular resistance (RVR). In children it is used to evaluate perfusion after renal transplantation [1,2], renal artery stenosis, venous thrombosis and acute and chronic renal failure. The RI is also used to differentiate obstructive from unobstructive uropathies [3,4], especially in paediatric upper tract urinary obstructions, but there are doubts about its reliability [5,6].…”

Section: Introductionmentioning

confidence: 99%

The renal‐resistive index from the last 3 months of pregnancy to 6 months old

G¹,

Persico²,

Tursini³

et al. 2001

BJU International

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Objective To measure the renal resistive index (RI, an estimate of renal vascular resistance, used to assess upper tract obstructive uropathy) from the last trimester of pregnancy to the sixth month of life in a large series of healthy subjects, and thus to identify normal values that can be used routinely. During the first semester of life significant haemodynamic changes during the physiological development of the kidney cause considerable variability in RI, which is thus considered less reliable in this period. Subjects and methods From September 1998 to October 1999, 93 subjects (186 renal units, RU) were enrolled; 32 were fetuses in the last trimester of pregnancy (group 1, 64 RU) and 61 were children (122 RU), 30 aged 0-1 month (group 2, 60 RU), 20 aged 1-3 months (group 3, 40 RU) and 11 aged 3-6 months (group 4, 22 RU). All subjects underwent colour Doppler ultrasonography and the RI of the renal artery was measured for each kidney.Results The RI was very high in group 1 but decreased noticeably during the first 6 months of life, reaching values similar to those in adults after the third month. The variability in RI continuously declined with age, becoming less important. The normal ranges for groups 1-4 were 0.67-0.88, 0.57-0.90, 0.60-0.84 and 0.65-0.75, respectively. There were no statistically significant differences between the left and right kidneys. Conclusion In the first semester of life there is more than one landmark value of RI depending on the month of age of the infant. This should be considered when assessing upper tract obstructive uropathies after birth and the RI should be compared with the normal ranges reported herein.

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Section: Introductionmentioning

confidence: 99%

The renal‐resistive index from the last 3 months of pregnancy to 6 months old

G¹,

Persico²,

Tursini³

et al. 2001

BJU International

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“…8,2 There are reliable evidences (obtained from larger sample sizes) about children with special renal disease, but issues of concern persist regarding association between kidney sizes and function in healthy children. [14][15][16][17] More appropriate evidence about correlation between sonographic parameters and renal function estimators in healthy children will help us to use sonographic values as a non-invasive method to estimate renal function.…”

Section: Introductionmentioning

confidence: 99%

Do kidney sizes in ultrasonography correlate to glomerular filtration rate in healthy children?

Adibi

Khosravi

2007

Australasian Radiology

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The objective of this study was to determine the correlation between ultrasonographic kidney sizes and glomerular filtration rate (GFR) in healthy children. This was a cross-section study on 116 healthy children. Renal diseases were ruled out by a paediatric nephrologist. Ultra sonography of both kidneys was carried out by an experienced radiologist. The volume was calculated by ellipsoid formula. We defined net volume as kidney volume-sinus fat volume'. The sum of right and left kidney sizes was defined as total sizes. We calculated GFR by means of the Schwartz formula. Correlations between kidney sizes and GFR were studied with Pearson correlation coefficient. The mean age of the children was 8.4+/-3.4. The GFR mean was 108+/-30 (mL/min per 1.73 m2). GFR correlated to total renal volume (r=0.52, P<0.001), total net volume (r=0.53, P<0.001) and total kidney length (r=0.59, P<0.001). Ultrasonographic kidney sizes, especially the kidney length, correlate to GFR in healthy children. Kidney sizes assessment by ultrasonography may play a role in renal function evaluation in children.

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Renal transplantation: The normal morphological and Doppler ultrasound examination

Jurriaans¹

1992

J of Clinical Ultrasound

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If ultrasound imaging and image-directed Doppler examination of the renal allograft is to provide information with respect to graft complications and graft failure, then a clear understanding of normal characteristics is required. Criteria for abnormality of a graft will include change in size, in parenchymal pattern, and in blood flow characteristics in the main and branch renal arteries and within the renal vein. Normal measurements for the renal allograft are presented as well as morphological and numerical data relating to cortico medullary differentiation. A wide range of values for indices quantifying Doppler data is recorded in the literature. Mean values and standard deviations from the mean are presented. The importance of different parameters as potential indicators of disease are stressed, but the limitations, usually as a result of normal variation and lack of specificity, are presented. The normal features of color-coded Doppler vascular supply, perfusion, and drainage are described.

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Acute renal transplant rejection in children: assessment by Duplex Doppler sonography

Cited by 19 publications

References 10 publications

The renal‐resistive index from the last 3 months of pregnancy to 6 months old

The renal‐resistive index from the last 3 months of pregnancy to 6 months old

Do kidney sizes in ultrasonography correlate to glomerular filtration rate in healthy children?

Renal transplantation: The normal morphological and Doppler ultrasound examination

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