Delayed Surgical Closure of the Patent Ductus Arteriosus: Does the Brain Pay the Price?

Abstract

To investigate the relation between duration of hemodynamically significant patent ductus arteriosus (PDA), cerebral oxygenation, magnetic resonance imaging-determined brain growth, and 2-year neurodevelopmental outcome in a cohort of infants born pretermwhose duct was closed surgically. Infants born preterm at <30weeks of gestational age who underwent surgical ductal closure between 2008 and 2018 (n=106) were included in this observational study. Near infrared spectroscopy-monitored cerebral oxygen saturation during and up to 24hours after ductal closure and a Bayley III developmental test at the corrected age of 2years is the institutional standard of care for this patient group. Infants also had magnetic resonance imaging at term-equivalent age. In total, 90 infants fulfilled the inclusion criteria (median [range]: 25.9weeks [24.0-28.9]; 856g [540-1350]. Days of a PDA ranged from 1 to 41. Multivariable linear regression analysis showed that duration of a PDA negatively influenced cerebellar growth and motor and cognitive outcome at 2years of corrected age. Prolonged duration of a PDA in this surgical cohort is associated with reduced cerebellar growth and suboptimal neurodevelopmental outcome.