Send us Fan Mail Dr. Jonathan Flyer, pediatric and fetal cardiologist at the University of Vermont, presents findings from a Vermont Oxford Network analysis of over 11,000 extremely low birth weight infants examining whether the method of patent ductus arteriosus (PDA) closure — transcatheter device versus surgical ligation — makes a difference for neurodevelopmental outcomes at 18 to 24 months. The answer: no difference between the two techniques on Bayley-4 cognitive, language, and motor sc...