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Color Doppler sonographic determination of renal blood flow in healthy children
1Kinderklinik St. Georg Leipzig, Germany.
Insights
Color Doppler sonography offers a new way to measure kidney blood flow in children. This method is reliable and consistent across childhood, aiding in understanding renal function.
Area of Science:
- Pediatric Nephrology
- Medical Imaging
- Renal Physiology
Background:
- Accurate measurement of renal perfusion is crucial for understanding kidney function in children.
- Current methods like scintigraphy have limitations in clinical practice.
- Color Doppler sonography presents a potential non-invasive alternative for volumetric renal blood flow assessment.
Purpose of the Study:
- To evaluate the utility of color Doppler sonography for measuring renal perfusion in healthy children.
- To establish reference values for renal perfusion indexed to body surface area in pediatric populations.
- To compare color Doppler sonography measurements with established scintigraphic methods.
Main Methods:
- Color Doppler sonography was used to measure renal perfusion in 63 healthy children across four age groups.
- Renal blood flow was calculated and indexed to body surface area.
- The technique was validated against 123I-hippurate clearance scintigraphy in 21 pediatric patients.
Main Results:
- Renal perfusion volume indexed to body surface area remained constant throughout childhood.
- A mean value of 383 ml/min x m2 was determined for renal perfusion.
- A significant correlation was found between color Doppler sonography and scintigraphy, validating the new method.
Conclusions:
- Color Doppler sonography is a valuable tool for non-invasively assessing volumetric renal perfusion in children.
- The established reference values provide a benchmark for evaluating renal blood flow in pediatric conditions.
- This technique offers a promising alternative to scintigraphy for routine clinical use.
Abstract:
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 x m2. 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 123I-hippurate clearance. This way a significant correlation of both methods can be demonstrated.