Evaluation of Serial Lung Ultrasound Data After Surfactant Treatments Applied With Different Methods in Preterm Babies

Intubating the infant, administering intratracheal surfactant, and then extubating them back to nasal respiratory support (ENSURE method)

Delivering surfactant via a thin catheter (5F) directly into the trachea while the infant remains on existing nasal respiratory support, without disconnecting them from it (LISA method)