Objective: To investigate respiratory practices to prevent or treat evolving bronchopulmonary dysplasia in neonatal intensive care units (NICUs) across Europe.

Study design: Between March and July 2024, a web-based survey was sent to European NICUs caring for infants born preterm with gestational age <28 weeks.

Results: We received replies from 447 of 721 (62%) NICUs across 24 European countries. Almost 16% of NICUs routinely intubate at birth, especially if the gestational age is <24 weeks. During transition most NICUs use continuous positive airway pressure ≥5 cmH₂O and start with an FiO₂ 0.3. Volume-targeted ventilation is the primary ventilation mode in 60% of the NICUs. Permissive hypercapnia is a common practice. Higher SpO₂ target limits have been adopted, although alarm settings vary across NICUs. Caffeine is routinely started (96%). Surfactant is used in all NICUs, mostly rescue (74%) via less invasive administration (81%). Prophylactic inhaled nitric oxide is not used. Treatment of patent ductus arteriosus varies; half of NICUs pharmacologically treat patent ductus arteriosus early, based on echocardiographic findings. Ureaplasma screening is done in 22% of NICUs. Most (97%) NICUs use postnatal corticosteroids, with dexamethasone being the preferred drug (65%) and starting 2-3 weeks after birth. Only 5% use corticosteroids prophylactically. After 2-3 weeks, diuretics are used frequently, inhaled corticosteroids/bronchodilators to a much lesser extent.

Conclusions: This large survey shows considerable practice variation in preventing and treating evolving bronchopulmonary dysplasia across Europe, especially for interventions with limited evidence.