Renal blood flow in neonates: quantification with color flow and pulsed Doppler US
Autor: | M. Van De Bor, J. O. Leighton, M. O. J. M. Visser, Frans J. Walther |
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Rok vydání: | 1992 |
Předmět: |
medicine.medical_specialty
Cardiac output Color Hemodynamics Renal Circulation Renal Artery medicine.artery Internal medicine Ductus arteriosus medicine Birth Weight Humans Radiology Nuclear Medicine and imaging Cardiac Output Renal artery Ultrasonography Renal circulation business.industry Abdominal aorta Infant Newborn Blood flow Surgery medicine.anatomical_structure Renal blood flow cardiovascular system Cardiology business Blood Flow Velocity Infant Premature |
Zdroj: | Europe PubMed Central |
ISSN: | 1527-1315 0033-8419 |
Popis: | Color flow and pulsed Doppler ultrasound measurements of renal artery blood flow were compared with cardiac output in 22 preterm and 19 full-term healthy neonates. Renal arteries were insonated 3-5 mm from the abdominal aorta at an angle of less than 15 degrees. Vessel diameter was estimated from color flow diameter. Total renal blood flow increased significantly (P less than .001) with advancing birth weight and gestational age, because of increased vessel diameter, but flow velocity did not. The mean (+/- 1 standard deviation) value for both right and left renal artery blood flow was 21 mL/min/kg +/- 5, and the mean proportion of cardiac output to the kidneys was 16.1% +/- 3.7. Seven preterm infants with a symptomatic patent ductus arteriosus had increased cardiac output values (444 mL/min/kg +/- 45) and reduced right (15 mL/min/kg +/- 7) and left (16 mL/min/kg +/- 7) renal artery blood flow, with 6.6% +/- 2.0 of cardiac output directed to the kidneys. These values normalized after closure of the ductus. This study provides normative data for renal artery blood flow in neonates during the first week of life. |
Databáze: | OpenAIRE |
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