Reduced oxygen concentration for the resuscitation of infants with congenital diaphragmatic hernia

Objective: To evaluate whether infants with congenital diaphragmatic hernia (CDH) can be safely resuscitated with a reduced starting fraction of inspired oxygen (FiO 2 ) of 0.5. Study design: A retrospective cohort study comparing 68 patients resuscitated with starting FiO 2 0.5 to 45 historical controls resuscitated with starting FiO 2 1.0. Results: Reduced starting FiO 2 had no adverse effect upon survival, duration of intubation, need for ECMO, duration of ECMO, or time to surgery. Furthermore, it produced no increase in complications, adverse neurological events, or neurodevelopmental delay. The need to subsequently increase FiO 2 to 1.0 was associated with female sex, lower gestational age, liver up, lower lung volume–head circumference ratio, decreased survival, a higher incidence of ECMO, longer time to surgery, periventricular leukomalacia, and lower neurodevelopmental motor scores. Conclusion: Starting FiO 2 0.5 may be safe for the resuscitation of CDH infants. The need to increase FiO 2 to 1.0 during resuscitation is associated with worse outcomes.