Duplex Doppler ultrasonographic evaluation of the fetal renal artery in normal and abnormal fetuses

Veille, JC; Kanaan, Camille

doi:10.1016/0020-7292(90)90138-b

Cited by 18 publications

(24 citation statements)

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“…Our findings concerning pulmonary artery velocities seem to be similar to those concerning renal artery velocities observed by Veille and colleagues [13,14] artery S/D indexes in normotrophic and hypotrophic fetuses were not statistically different. In contrast, renal artery pulsatility index measurements were found to be significantly higher in hypotrophic fetuses when com pared to those of normotrophic fetuses, indicating that the S/D ratio cannot discriminantly identify impaired renal blood flow.…”

Section: Discussionsupporting

confidence: 76%

Fetal Pulmonary Artery Doppler Waveform: A Preliminary Report

Cynober

Cabrol²,

Haddad³

et al. 1997

Fetal Diagn Ther

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Objective: The study of fetal lung circulation by means of pulmonary Doppler investigation. Methods: Pulmonary Doppler ultrasound obtained with color pulsed-Doppler with a 3.5- to 5-MHz probe. Measure of resistance index and pulsatility index. Patients: 47 pregnant women with singleton, between 18 and 39.5 weeks of gestation, were recruited to have pulmonary Doppler ultrasound. Seven fetuses had intrauterine fetal growth retardation (IUGR). Overall, 50 Doppler velocity waveforms were measured. Results: Resistance and pulsatility index were measured in all patients and at each examination. Resistance index (0.86 ± 0.03) and pulsatility index (2.46 ± 0.34) were found to be stable during pregnancy. Pulmonary pulsatility index in IUGR fetuses (2.71 ± 0.33) were found to be higher than those in normotrophic infants (p = 0.006), whereas no difference was found in resistance index between the same subgroups. Moreover, no difference was found in pulsatility index measurements between preterm small-for-gestational age fetuses and normotrophic fetuses measured between 36 and 39.5 weeks of gestation (2.68 ± 0.31 vs. 2.49 ± 0.28). Conclusion: Pulmonary resistance index is not statistically different between normotrophic and IUGR fetuses. In contrast, pulmonary pulsatility index is significantly higher in IUGR fetuses when compared to normotrophic fetuses. Pulmonary Doppler ultrasound should be evaluated in a larger trial and correlation between Doppler measurements and fetal lung maturation should be studied.

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Section: Discussionsupporting

confidence: 76%

Fetal Pulmonary Artery Doppler Waveform: A Preliminary Report

Cynober

Cabrol²,

Haddad³

et al. 1997

Fetal Diagn Ther

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“…Moreover, the fetal and maternal outcomes were followed until delivery to confirm normal pregnancy outcome. A few previous studies have presented normal values of renal artery Doppler flow [3][4][5][6][7][8][9], but the current study is the first to include fetuses in the early second trimester of pregnancy and to have a large sample size. We chose to initiate the fetal renal artery Doppler assessment in the early second trimester because the fetal renal pathologic presentation starts at this time, so reference data on the normal renal artery is required [10].…”

Section: Discussionmentioning

confidence: 99%

Doppler waveform patterns and reference ranges of fetal renal artery blood flow indices in normal Thai fetuses during the second trimester

Ponglopisit

2015

Asian Biomedicine

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Background: Fetal hemodynamics can be assessed by Doppler ultrasonography, but the normal Doppler waveform pattern and reference range of fetal renal artery blood flow indices in normal Thai fetuses during the second trimester have not been studied. Objectives: To study the pattern and establish the normal reference range of fetal renal artery blood flow indices in the normal Thai fetus during the second trimester. Materials and methods:This cross-sectional descriptive study included 512 normal singleton pregnant women, gestational age between 14 (+0) and 28 (+6) weeks. Ultrasonography was performed to assess the Doppler waveform pattern and estimate the normal reference range of fetal renal artery blood flow indices. All fetuses were delivered at term with normal outcomes at birth. The mean and 95 th and 5 th percentiles of the Doppler indices for each gestational week were estimated. Results: Doppler patterns with absence of diastolic flow in the entire cardiac cycle (type I), and absence of diastolic flow at the end of cardiac cycle (type II) were presented in about 10.4% of normal fetuses during the second trimester of pregnancy. Values for pulsatility index, peak systolic velocity, systolic-to-diastolic ratio, and resistance index (with absent end-diastolic velocity (AEDV) removed) each increased significantly with gestational age. The increase in end-diastolic velocity (with AEDV removed) with gestational age was not significant. Conclusion: These normative data could serve as a basis for evaluation of the fetal renal artery blood flow, which should be of benefit for pregnancy management, especially in situations that interfere with fetal renal perfusion.

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“…The increased resistance index of the descending thoracic aorta could be a component of the centralization of the fetal circulation due to chronic hypoxia. The fetal renal blood flow may similarly be affected as a result of an elevated intravascular resistance, leading to a decline in renal perfusion [10].…”

Section: Discussionmentioning

confidence: 99%

“…The normal range was defined by regression lines and confidence values: the mean (a regression line in the middle) ± standard deviation (SD; two lines below and above the mean line). The normal field was taken from literature data on the umbilical artery [9] and the renal artery [5,10,11]. We employed the international standard.…”

Section: Renal Artery Examinationmentioning

confidence: 99%

Fetal renal artery flow and renal echogenicity in the chronically hypoxic state

Surányi¹,

Streitman²,

Pál

et al. 2000

Pediatr Nephrol

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The object of this study was to investigate the fetal renal arterial blood flow in normal and hyperecho-genic kidneys during the third trimester of gestation. The pregnancies screened were all chronically hypoxic. Depending on the etiology of the intrauterine chronic hypoxia, the cases were divided into two study groups. Group I comprised 120 pregnant women with pregnancy-associated hypertension and/or proteinuria. Group II consisted of 87 pregnancies with intrauterine growth retardation. Both study groups included pregnant women from the third trimester. Hyperechogenic renal medullae were detected in 15 out of 120 cases with pregnancyassociated hypertension and/or proteinuria, and in 22 fetuses of the 87 pregnancies involving intrauterine growth retardation. Fetal renal hyperechogenicity appears to be an indicator of fetal arterial circulatory depression, correlated with pathological changes in the resistance index for the fetal renal arteries. The fetal renal arterial blood flow resistance index was significantly lower in hyperechogenic cases. This may also be an in utero indication of subsequent intrauterine and neonatal complications, such as cesarean section because of fetal distress (43%), treatment in a neonatal intensive care unit (51%) or increased perinatal mortality (5.4%, as compared with 0.8-1.0% in the normal population). Detailed ultrasound and Doppler examinations of renal parenchyma and arteries appear to be useful methods in the prenatal diagnosis of reduced renal perfusion and of intrauterine hypoxia to detect possible pathological fetal conditions in utero.

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Duplex Doppler ultrasonographic evaluation of the fetal renal artery in normal and abnormal fetuses

Cited by 18 publications

References 0 publications

Fetal Pulmonary Artery Doppler Waveform: A Preliminary Report

Fetal Pulmonary Artery Doppler Waveform: A Preliminary Report

Doppler waveform patterns and reference ranges of fetal renal artery blood flow indices in normal Thai fetuses during the second trimester

Fetal renal artery flow and renal echogenicity in the chronically hypoxic state

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