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. 2009:2009:960490.
doi: 10.1155/2009/960490. Epub 2009 Feb 25.

Correlation of hydronephrosis index to society of fetal urology hydronephrosis scale

Krishnan Venkatesan  1 , Joel Green, Steven R Shapiro, George F Steinhardt
Affiliations

Correlation of hydronephrosis index to society of fetal urology hydronephrosis scale

Krishnan Venkatesan et al. Adv Urol. 2009.

Abstract

Purpose. We seek to correlate conventional hydronephrosis (HN) grade and hydronephrosis index (HI). Methods. We examined 1207 hydronephrotic kidneys by ultrasound. HN was classified by Society of Fetal Urology guidelines. HN was then gauged using HI, a reproducible, standardized, and dimensionless measurement of renal area. We then calculated average HI for each HN grade. Results. Comparing HI to standard SFU HN grade, average HI is 89.3 for grade I; average HI is 83.9 for grade II; average HI is 73.0 for grade III; average HI is 54.6 for SFU grade IV. Conclusions. HI correlates well with SFU HN grade. The HI serves as a quantitative measure of HN. HI can be used to track HN over time. Versus conventional grading, HI may be more sensitive in defining severe (grades III and IV) HN, and in indicating resolving, stable, or worsening HN, thus providing more information for clinical decision-making and HN management.

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Figures

Figure 1
Figure 1
Boundaries of hydronephrotic kidney marked.
Figure 2
Figure 2
SFU grade IV hydronephrosis; Calculated HI 58.5. The dotted line outlines the renal pelvis [black] as used in calculating HI.
Figure 3
Figure 3
Same kidney 1.5 months later. SFU grade IV hydronephrosis; Calculated HI 27. The dotted line outlines the entire renal area, including renal pelvis [black] and parenchyma (dark gray). While the SFU grade remained the same, the HI has deteriorated significantly, indicating an actual worsening HN.
See this image and copyright information in PMC

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