Importance of Renal Resistive Index in Children Suffering From Vesicoureteral Reflux

Radmayr, Christian; Klauser, Andrea; Maneschg, Christoph; Frauscher, Ferdinand; Bartsch, Georg

doi:10.1097/00005392-199904010-00441

Cited by 1 publication

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“…Radmayr et al 11 found renal RI values in highgrade VUR patients to be significantly higher than the values in both low-grade VUR patients and the control group. A mean RI value of 0.77 was reported in patients with grade IV and grade V patients, which was significantly higher than that of grade I, II, and III patients.…”

Section: 18mentioning

confidence: 93%

“…Mean RI values in patients with VUR were significantly higher than in patients without VUR, which is also supported by our study. On the other hand, Radmayr et al 11 did not compare the RI values of patients with lowgrade and high-grade VUR with the control group separately. In our study, the mean RI values of lowgrade and high-grade VUR patients were compared separately with the mean RI values of the control group, and no significant difference was found between the mean RI values of low-grade VUR patients and the control group.…”

Section: 18mentioning

confidence: 99%

“…RI values are calculated from the arcuate or interlobular renal arteries and should be performed to evaluate diseases affecting the tubulointerstitial or vascular systems. 11 In the case of hydronephrosis due to urinary tract obstruction, the pressure inside the renal pelvis increases progressively, resulting in a sudden and marked elevation in the RI value, which returns to normal limits when the obstruction disappears.…”

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confidence: 99%

“…In all of these circumstances, it is stated that RI values higher than 0.70 point to pathological changes. [11][12][13]14 Gilbert et al 15 and Fung et al 16 claim that the evaluation of RI values is useful in hydronephrotic children.…”

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confidence: 99%

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Evaluation of Renal Resistivity Index Before and After Voiding Cystoureterography Examination in Patients With Vesicoureteral Reflux

Avcu

Akpınar

Biren

2009

Journal of Diagnostic Medical Sonography

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Vesicoureteral reflux (VUR) occurs commonly in children and can cause significant renal damage. The purpose of this study is to assess the changes in renal vasculature with spectral Doppler sonography in patients with VUR. In addition, the possible effects of voiding cystoureterography (VCU) on the kidneys in patients with VUR are investigated by calculating renal resistivity index (RI) values before and after VCU using spectral Doppler sonography. In this prospective study, 114 kidneys of 58 children ages 0 to 16 years were included. The RI values that were calculated before and after VCU and RI values in different grades of VUR were compared statistically. In patients with VUR, the renal parenchymal RI values before and after VCU were significantly higher than those in patients without VUR ( P < .05). The mean pre-VCU RI values were 0.68 ± 0.03 and 0.65 ± 0.05 in patients with VUR and in the control group, respectively, and the mean post-VCU RI values were 0.68 ± 0.03 and 0.65 ± 0.04 in patients with VUR and in the control group, respectively. Calculating renal RI values from arcuate or interlobar renal arteries with spectral Doppler sonography while the patients are in a supine or lateral decubitus position is a useful technique in patients with VUR, being significantly higher in high-grade VUR patients than in low-grade VUR patients. There is no significant effect of the contrast agent reaching the renal calycial system during VCU examination on renal RI values.

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Section: 18mentioning

confidence: 93%

Section: 18mentioning

confidence: 99%

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confidence: 99%