LISA Catheter With Marked vs. Unmarked Tip in Extremely Low Birth Weight Infants With RDS

This is an unblinded, randomized, controlled, crossover (AB/BA) trial of surfactant treatment with LISA catheter with a marked tip vs. LISA catheter with an unmarked tip in a manikin simulating an extremely low birth weight infant. Participants will be level III NICU consultants and residents. Randomization will be performed using a computer-generated random assignment list. The primary outcome measure will be the positioning of the device at the correct depth in the trachea. The secondary outcome measures will be the time and number of attempts to achieve the correct depth and participant satisfaction.