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[Assessment of renal resistance index in children with vesico-ureteral reflux]

F Frauscher1, C Radmayr, A Klauser

  • 1Univ. Klinik für Radiologie II, Universität Innsbruck.

Ultraschall in Der Medizin (Stuttgart, Germany : 1980)
|August 13, 1999
PubMed

Insights

Renal resistive index (RI) effectively evaluates renal perfusion in children with vesicoureteral reflux (VUR). High-grade VUR shows increased RI, correlating well with scintigraphy, aiding in follow-up.

Area of Science:

  • Pediatric Nephrology
  • Diagnostic Imaging
  • Vascular Ultrasound

Background:

  • Vesicoureteral reflux (VUR) is a common condition in children.
  • Assessing renal perfusion is crucial for managing VUR complications.

Purpose of the Study:

  • To evaluate the utility of renal resistive index (RI) in assessing renal perfusion in pediatric VUR patients.
  • To correlate RI measurements with scintigraphy findings.

Main Methods:

  • Investigated 92 kidneys in 46 children with VUR (mean age 6 years).
  • Measured RI using color Doppler ultrasound at interlobar/arcuate arteries.
  • Correlated RI values with renal scintigraphy results.

Main Results:

  • VUR grades I-III showed normal RI (<0.7).
  • VUR grades IV-V had significantly elevated RI (0.77 +/- 0.07, p < 0.0001).
  • RI correlated well with scintigraphy (r² = 0.61).

Conclusions:

  • Renal perfusion changes are evident only in high-grade VUR.
  • Color Doppler ultrasound and RI are valuable tools for monitoring high-grade VUR.
  • Findings support the use of RI in VUR follow-up.
Abstract

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