Noninvasive Characterization of Renal Artery Blood Flow

Greene, Ernest R.; Venters, M. D.; Avasthi, Pratap S.; Conn, Richard; Jahnke, Robert W.

doi:10.1016/s0022-5347(17)54080-x

Cited by 16 publications

(27 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, we did not assess renal artery diameter because of the potential for significant measurements errors in such small arteries [5,8,12]. But in vitro and animal studies have shown that RBFV correlates well with renal blood flow [13,14]. Consequently, renal artery blood flow velocity is commonly used as a good marker of the functionality of kidneys [3,7,10,15,16].…”

Section: Discussionmentioning

confidence: 99%

Renal Blood Flow Velocity in Preterm and Term Neonates during the Fourth Day of Life: Changes in Relation to Gestational Age and Birth Weight

Pezzati¹,

Danesi²,

Pozzessere³

et al. 1997

Neonatology

View full text Add to dashboard Cite

Measurements of renal artery blood flow velocity have been previously reported during prenatal life and during the first month of life in neonates. Since renal flow velocity increases during the first 3 days of postnatal age we determined, during the fourth day of life, the changes of renal blood flow velocity in relation to gestational age and birth weight in 109 healthy preterm and term infants with gestational age between 26 and 42 weeks and birth weight between 750 and 3,730 g. Renal arteries were insonated about 3 mm from the abdominal aorta, by placement of a microconvex 7-MHz transducer below the costal margin in the dorsolateral area of the right or left flank. Mean flow velocity significantly increased with advancing of gestational age and birth weight. This study provides normative data for renal artery blood flow velocity in healthy preterm and term infants during the fourth day of life.

show abstract

Section: Discussionmentioning

confidence: 99%

Renal Blood Flow Velocity in Preterm and Term Neonates during the Fourth Day of Life: Changes in Relation to Gestational Age and Birth Weight

Pezzati¹,

Danesi²,

Pozzessere³

et al. 1997

Neonatology

View full text Add to dashboard Cite

show abstract

“…With two-dimensional/pulsed Doppler ultrasound reliable and noninvasive estimates of renal blood flow velocity (RBFV) in the right renal artery could be obtained [11][12][13][14]. In vitro and animal studies had demonstrated a good correlation between RBFV measurements and renal blood flow [15,16].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Phototherapy on Renal Blood Flow Velocity in Preterm Infants

Benders

Bel²,

Bor³

1998

Neonatology

View full text Add to dashboard Cite

Mean renal blood flow velocity (RBFV) was studied with two-dimensional/pulsed Doppler ultrasound and relative renal vascular resistance (RVR) was calculated before, during, and after phototherapy treatment in 30 preterm infants (gestational age ≤32 weeks) who were treated for a minimum of 12 h with phototherapy for nonhemolytic hyperbilirubinemia. RBFV decreased, whereas RVR increased significantly after the initiation of phototherapy. In ‘healthy’ (nonventilated) infants RBFV and RVR returned to baseline values after discontinuation of phototherapy. Whereas in ‘unhealthy’ (ventilated) infants, RBFV and RVR did not return to baseline values after discontinuation of phototherapy. In 16 infants (>50% of the cases) the ductus arteriosus reopened during phototherapy.

show abstract

“…Initial investigations in the 1970s 1 and the early 1980s 2,3 and the validation of the method in animal experiments by comparing it with invasive perfusion measurements or in vitro investigations [4][5][6][7][8][9] led to recommendations for clinical application of volumetric flow measurements.…”

Section: Discussionmentioning

confidence: 99%

Color Doppler sonographic determination of renal blood flow in healthy children.

Scholbach

1999

Journal of Ultrasound in Medicine

View full text Add to dashboard Cite

he determination of renal blood flow is of great interest in many clinical settings that alter renal function, such as acute or chronic renal failure, inflammation, scarring, swelling, trauma, operations, and other conditions. Renal perfusion is the necessary prerequisite of renal function. Depression of renal perfusion will lead to loss of function when the functional reserve of the kidney has become exhausted. Until now pediatricians have been dependent on relatively insensitive indicators of renal function, such as creatinine or urea concentrations, or has had to carry out time-consuming or expensive procedures like tests of clearances or nuclear medical investigations. A bedside method for evaluating renal perfusion is therefore desirable.Color Doppler sonography offers the possibility of measuring renal perfusion parameters even in small or chronically ill children. Only semiquantitative techniques have been established. The most commonly used are RI and PI. These indices reflect relationships of blood flow velocities at various points in one cardiac cycle but do not give any information about the volume of blood passing through the kidneys. They were the first parameters to describe the spectral analysis of the renal Doppler sonographic The volumetric measurement of the real renal perfusion is of interest in many clinical situations. It promises better understanding of renal function and development in healthy children and in children with acute or chronic renal failure, inflammation of any type, scarring, swelling, trauma, operations, and other conditions. Until now only scintigraphic techniques allowed measurement of the renal plasma flow in clinical practice. With color Doppler sonography all relevant data to calculate the volume of blood that passes through the kidney in a certain time can be measured. The aim of this paper is to investigate the utility of color Doppler sonography in describing renal perfusion in 63 healthy children in four separate age groups. It can be shown that the perfusion volume related to the body surface area is constant throughout childhood. Its mean value is 383 ml/min ⋅ m 2 .The results of the new technique of color Doppler sonographic volumetric determination of renal blood flow are then compared in 21 pediatric patients with the results of scintigraphic determination of the renal perfusion by 123 I-hippurate clearance. This way a significant correlation of both methods can be demonstrated.

show abstract

Noninvasive Characterization of Renal Artery Blood Flow

Cited by 16 publications

References 0 publications

Renal Blood Flow Velocity in Preterm and Term Neonates during the Fourth Day of Life: Changes in Relation to Gestational Age and Birth Weight

Renal Blood Flow Velocity in Preterm and Term Neonates during the Fourth Day of Life: Changes in Relation to Gestational Age and Birth Weight

The Effect of Phototherapy on Renal Blood Flow Velocity in Preterm Infants

Color Doppler sonographic determination of renal blood flow in healthy children.

Contact Info

Product

Resources

About