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© 2008 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 27:199-207 • 0278-4297

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

Pilvi Ilves, MD, PhD, Mare Lintrop, MD, MSc, Inga Talvik, MD, Külli Muug, MD, Karin Asser, MD and Maie Veinla, MD

Radiology Service (P.I., M.L., K.A.) and Children’s Clinic (I.T., K.M., M.V.), Tartu University Hospital, Tartu, Estonia; and Department of Hematology and Oncology, University of Tartu, Tartu, Estonia (P.I., M.L.).

Address correspondence to Pilvi Ilves, MD, PhD, Department of Hematology and Oncology, University of Tartu, Lunini 6, 51014 Tartu, Estonia. E-mail pilvi.ilves{at}kliinikum.ee

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

Abbreviations: ACA, anterior cerebral artery • BA, basilar artery • BFV, blood flow velocity • BP, blood pressure • CA, celiac artery • CI, confidence interval • ICA, internal carotid artery • MCA, middle cerebral artery • RA, renal artery • RI, resistive index • SMA, superior mesenteric artery • TAMV, time of the maximum velocity envelope curve • TAV, time-averaged velocity • Vd, end-diastolic flow velocity • Vs, systolic flow velocity




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P. Ilves, M. Lintrop, I. Talvik, K. Muug, and L. Maipuu
Changes in Cerebral and Visceral Blood Flow Velocities in Asphyxiated Term Neonates With Hypoxic-Ischemic Encephalopathy
J. Ultrasound Med., November 1, 2009; 28(11): 1471 - 1480.
[Abstract] [Full Text] [PDF]


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Copyright © 2008 by the American Institute of Ultrasound in Medicine.