Renal blood flow pattern by noninvasive Doppler ultrasound in normal children and acute renal failure patients.

Wong, Sik-Nin; Lo, Roxy N.S.; Yu, E. C. L.

doi:10.7863/jum.1989.8.3.135

Cited by 63 publications

(23 citation statements)

References 2 publications

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“…The Doppler indices recorded here--which are thought to reflect resistance and pulsatility of the vessels--might, therefore, have been expected to show similar changes. In addition, similar changes with age have been shown in studies carried out in healthy children of different age groups [16,17].…”

Section: [] Risupporting

confidence: 59%

Pulsatility and resistance indices in intrarenal arteries of normal adults

et al. 1994

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In order to establish the normal range of values of Pulsatility (PI) and Resistance (RI) Indices in the intrarenal vasculature, a study of 50 healthy volunteers (23 males, 27 females), divided into five groups of 10 according to age, was performed with Duplex Doppler ultrasound. Both kidneys were examined in all individuals and, in 12, indices were also compared between upper and lower poles of both kidneys. In addition, repeat examinations were performed in nine subjects on three different days, in order to assess the reproducibility of the method. No differences were found in the mean values of both indices between males and females, upper and lower poles, right and left kidneys. A statistically significant increase (p < 0.01, unpaired t-test) was demonstrated when the oldest age group (7th decade) was compared to the youngest age group (3rd decade). The method appeared remarkably reproducible for RI (4.2-7%), with wider variation in the PI (9.5-22.7%).

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Section: [] Risupporting

confidence: 59%

Pulsatility and resistance indices in intrarenal arteries of normal adults

et al. 1994

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“…28 Several investigations of the renal BFV and RI in children, including a small group of infants during the first year of life, have been performed in cross-sectional studies. 7,[15][16][17] We showed a steady increase of the renal BFV in the same group of healthy infants during the first months of life. Renal physiologic development might explain the observation.…”

Section: -14mentioning

confidence: 78%

“…13,14 Cross-sectional studies of the BFV in renal arteries have also been performed in infants older than 30 days. 7,[15][16][17] To our knowledge there have been no studies looking at the normal preprandial splanchic BFV in infants older than 1 month. …”

mentioning

confidence: 99%

Developmental Changes in Cerebral and Visceral Blood Flow Velocity in Healthy Neonates and Infants

Ilves

Lintrop

Talvik

et al. 2008

Journal of Ultrasound in Medicine

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Objective. The purpose of this study was to evaluate the changes in Doppler blood flow velocity (BFV) in cerebral and visceral arteries during infancy. Methods. The BFV was measured in 37 healthy term neonates in the anterior cerebral artery (ACA), middle cerebral artery (MCA), basilar artery, internal carotid artery (ICA), celiac artery (CA), superior mesenteric artery (SMA), and renal artery (RA). Results. The mean BFV increased and the resistive index decreased (P < .05) in all cerebral arteries, SMA, and CA by the age of 12 to 23.9 hours and in the RA by the age of 24 to 35.9 hours compared with 2 to 11.9 hours. A further significant increase (P < .05) of the mean BFV occurred in all arteries except the ICA and CA by the age of 72 to 120 hours compared with 12 to 23.9 hours. By the age of 21 to 59 days, the mean BVF doubled in all investigated arteries compared with 2 to 11.9 hours, with a further significant increase (P < .05) by the age of 150 to 240 days in cerebral and renal arteries. There was no correlation between the mean blood pressure (BP) and mean BFV in the ACA and MCA. However, there was a positive correlation (r ≥ 0.5; P < .05) between the BP and BFV in the RA and SMA at the age of 12 to 23.9 hours. Conclusions. A significant increase in the cerebral and visceral BFV occurs normally throughout infancy, with the visceral BFV affected by BP changes during the first day of life. Key words: cerebral blood flow velocity; neonate; sonography; visceral blood flow velocity. oppler sonography is a noninvasive method that allows repeated and safe assessment of hemodynamics in neonatal units. Several studies have shown that a pulsed Doppler technique can be used to examine the pattern of blood flow velocity (BFV) in major vessels of the brain 1 as well as visceral organs 2 in neonates with good reproducibility. Several studies have followed the BFV in different cerebral 3-6 and visceral 7-11 arteries during cardiovascular adaptation of the neonate within the first week of life. These studies typically evaluated a single organ. A few cross-sectional studies have followed the changes of the cerebral BFV in neonates up to the first 20 days of life 12 and infants older than 30 days. 13,14 Cross-sectional studies of the BFV in renal arteries have also been performed in infants older than 30 days. 7,[15][16][17] To our knowledge there have been no studies looking at the normal preprandial splanchic BFV in infants older than 1 month.

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“…Earlier studies reported elevated renal vascular impedance with chronic hypertension (Norris et al, 1989) and acute renal failure (Wong et al, 1989). The intrarenal PI and RI would appear to be closely related to renal hemodynamic parameters and creatinine clearance in patients with chronic renal failure and hypertension (Petersen et al, 1995).…”

Section: Renal Medical Diseasesmentioning

confidence: 88%

The Evaluation of Renal Hemodynamics with Doppler Ultrasonography

Kaya¹

2012

Hemodynamics - New Diagnostic and Therapeutic Approaches

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Renal blood flow pattern by noninvasive Doppler ultrasound in normal children and acute renal failure patients.

Cited by 63 publications

References 2 publications

Pulsatility and resistance indices in intrarenal arteries of normal adults

Pulsatility and resistance indices in intrarenal arteries of normal adults

Developmental Changes in Cerebral and Visceral Blood Flow Velocity in Healthy Neonates and Infants

The Evaluation of Renal Hemodynamics with Doppler Ultrasonography

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