Currently, training for umbilical catheter placement in neonates is primarily focused on inserting the catheter into the umbilical vein. However, no models to date allow real-time ultrasound assessment of catheter tip navigation and final positioning during the procedure. This study introduces the first training simulator designed specifically to address this need, enabling operators to practice not only the insertion but also the ultrasonographic localization of the catheter tip during the placement process.

Inclusion Criteria:

• Experts must have at least 3 years of experience in neonatal abdominal ultrasound or central line placement.

Trainees must be medical residents in their 3rd year or beyond.

Exclusion Criteria:

• Less than 3 years of relevant experience for expert participants. Less than 3rd year of specialty training for trainee participants.