Bedside Ultrasound to Monitor Lung Function and Blood Flow in Newborns Treated With Surfactant

Intratracheal administration of pulmonary surfactant with any of the approved methods: (a) via endotracheal tube in a mechanically-ventilated infant, (b) with the INSURE method (intubation-surfactant-extubation), or (c) with LISA method (through a thin catheter inserted intratracheally in a spontaneously breathing infant, supported with CPAP)