Prospective evaluation of renal artery resistance and pulsatility indices in normal pregnant women

Dib, Fadia; Duarte, Geraldo; Sala, Maria Matheus de; Ferriani, Rui Alberto; Berezowski, Aderson Tadeu

doi:10.1002/uog.240

Cited by 10 publications

(10 citation statements)

References 12 publications

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“…In their group of volunteers of an average age of 42 years, the mean value of RI for women was 0.58 ± 0.04, while for men it was 0.55 ± 0.05. The mean value of RI in our study was also identical to the mean value of RI, recently reported by Dib et al 42 for young pregnant (0.65 ± 0.02) and non‐pregnant (0.65 ± 0.03) women. These values suggest that higher values of RI can be expected in young women.…”

Section: Discussionsupporting

confidence: 91%

Assessment of variability of renal blood flow Doppler parameters during the menstrual cycle in women

Krejza¹,

Ustymowicz²,

Szylak³

et al. 2004

Ultrasound in Obstet & Gyne

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Section: Discussionsupporting

confidence: 91%

Assessment of variability of renal blood flow Doppler parameters during the menstrual cycle in women

Krejza¹,

Ustymowicz²,

Szylak³

et al. 2004

Ultrasound in Obstet & Gyne

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“…The resistivity index (RI) value from the renal arteries was assessed according to the RA PSV-RA EDV/RA PSV formula [10]. The pulsatility index (PI) value from the renal arteries was determined according to the RA PSV-RA EDV/Mean Renal Arterial Flow Velocity formula [11]. All measurements were made at least twice, and the mean result was recorded as the final value.…”

Section: Methodsmentioning

confidence: 99%

The Usefulness of Renal Doppler Parameters in Chronic Kidney Disease: Is There a Cut-Off Value to Estimate End Stage Kidney Disease?

Gülek

Söker

Erken

et al. 2016

OJRad

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Aims: In this study, Doppler parameters were studied in patients with advanced stage renal disease, and the relationship between Doppler parameters and renal disease stage was investigated. Doppler values were evaluated for a cut-off value between normal and end-stage kidney disease group. Materials and methods: 50 patients with chronic kidney disease and 15 patients belonging to the same age group and with normal serum creatinine levels were comprised of the study and control groups. Resistivity and pulsatality indices were measured at the main renal arteries and interlobular arteries at both sides. Results: Statistically significant differences were found between the PI and RI values obtained from the main renal and interlobular arteries. PI sums were compared with those from the control group, and a cut-off value of 2.15 was found, with a sensitivity of 90% and a specificity of 86.7%. Conclusion: Any increase in the RI and PI values obtained from the main renal and interlobular arteries must bring to mind the possibility of advancing renal damage and interstitial fibrosis. Patients with and without renal parenchymal damage can be differentiated by means of comparing the total PI values obtained from the right and left main renal and interlobular arteries.

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“…In studies performed during pregnancy, pyelocaliceal dilatation is most frequently observed in the right kidney ( 1 - 5 ) . As regards studies of RI and PI of the renal arteries, no significant differences are found in such indices during pregnancy ( 6 , 7 ) . In a study, RI decrease is observed in the renal arteries ( 8 ) while, in another, RI increase is observed in the renal arteries ( 9 ) .…”

Section: Introductionmentioning

confidence: 95%

Ultrasonographic study and Doppler flow velocimetry of maternal kidneys and liver in low-risk pregnancy

et al. 2015

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ObjectiveLongitudinal study with B-mode ultrasonography and Doppler ultrasonography of maternal kidneys and liver in low-risk pregnancy, to establish and quantify normality parameters, correlating them with physiological changes.Materials and MethodsTwenty-five pregnant women were assessed and selected to participate in the study, each of them undergoing four examinations at the first, second, third trimesters and postpartum.ResultsFindings during pregnancy were the following: increased renal volume, pyelocaliceal dilatation with incidence of 45.4% in the right kidney, and 9% in the left kidney; nephrolithiasis, 18.1% in the right kidney, 13.6% in the left kidney. With pyelocaliceal dilatation, mean values for resistivity index were: 0.68 for renal arteries; 0.66 for segmental arteries; 0.64 for interlobar arteries; 0.64 for arcuate arteries. Without pyelocaliceal dilatation, 0.67 for renal arteries; 0.64 for segmental arteries; 0.63 for interlobar arteries; and 0.61 for arcuate arteries. Portal vein flow velocities presented higher values in pregnancy, with mean value for maximum velocity of 28.9 cm/s, and 22.6 cm/s postpartum. The waveform pattern of the right hepatic vein presented changes persisting in the postpartum period in 31.8% of the patients. Cholelithiasis was observed in 18.1% of the patients.ConclusionAlterations in renal volume, pyelocaliceal dilatation, nephrolithiasis, cholelithiasis, changes in portal vein flow velocity, alterations in waveform pattern of the right hepatic vein, proved to be significant.

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Prospective evaluation of renal artery resistance and pulsatility indices in normal pregnant women

Abstract: Objectives To establish normal values for renal artery resistance index (RI) and pulsatility index (PI

Cited by 10 publications

References 12 publications

Assessment of variability of renal blood flow Doppler parameters during the menstrual cycle in women

Assessment of variability of renal blood flow Doppler parameters during the menstrual cycle in women

The Usefulness of Renal Doppler Parameters in Chronic Kidney Disease: Is There a Cut-Off Value to Estimate End Stage Kidney Disease?

Ultrasonographic study and Doppler flow velocimetry of maternal kidneys and liver in low-risk pregnancy

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