F J Weir1, A Ohlsson, T L Myhr, K Fong, M L Ryan. 1. Department of Newborn and Developmental Paediatrics, Women's College Hospital, Toronto, Ontario, Canada.
Abstract
UNLABELLED: The study objective was to determine the effect of a patent ductus arteriosus (PDA) on cerebral blood flow velocity in ventilated, very low birth weight neonates, in the first 5 days of life. Sonography of the right middle cerebral artery and ductus arteriosus was performed using a colour Doppler technique. Statistical analysis was by stepwise regression. Thirty-one neonates without and 43 with a PDA, mean (SD) birth weight 1004 g +/- 192 and 1071 g +/- 227 respectively, were studied. The end diastolic and mean velocities were reduced (P = 0.008 and P = 0.129) and the resistive index was increased (P = 0.047) by a PDA. pH was inversely related to end diastolic and mean velocities (P = 0.015 and P = 0.003), suggesting that low pH may increase cerebral artery blood flow velocity. CONCLUSION: A patent ductus arteriosus reduces middle cerebral artery blood flow velocity in very low birth weight neonates.
UNLABELLED: The study objective was to determine the effect of a patent ductus arteriosus (PDA) on cerebral blood flow velocity in ventilated, very low birth weight neonates, in the first 5 days of life. Sonography of the right middle cerebral artery and ductus arteriosus was performed using a colour Doppler technique. Statistical analysis was by stepwise regression. Thirty-one neonates without and 43 with a PDA, mean (SD) birth weight 1004 g +/- 192 and 1071 g +/- 227 respectively, were studied. The end diastolic and mean velocities were reduced (P = 0.008 and P = 0.129) and the resistive index was increased (P = 0.047) by a PDA. pH was inversely related to end diastolic and mean velocities (P = 0.015 and P = 0.003), suggesting that low pH may increase cerebral artery blood flow velocity. CONCLUSION: A patent ductus arteriosus reduces middle cerebral artery blood flow velocity in very low birth weight neonates.
Authors: M I Argyropoulou; V Xydis; A Drougia; P I Argyropoulou; M Tzoufi; A Bassounas; S Andronikou; S C Efremidis Journal: Neuroradiology Date: 2003-08-27 Impact factor: 2.804