Nose drops vs. needles: can a simple spray replace IV pain relief for tiny babies?

This study compares two ways of giving fentanyl (a painkiller) to preterm babies undergoing painful procedures like inserting a breathing tube or a central line. One method uses a tiny spray into the nose, the other uses an IV needle. The goal is to see if the nose spray works just as well, offering a less invasive option. About 75 preterm infants will participate.