The investigators propose performing a retrospective analysis of the current respiratory management methods to potentially find a correlation between the number of steroid doses administered, the timing of initiation of steroid therapy and the effect on premature infants at risk for developing BPD. The investigators are also going to explore the number and timing of diuretic medications and average fluid intake.
Assess the impact of steroid, diuretic, and fluid practices on BPD outcomes in extreme premature infants in the Banner - University Medical Center Phoenix (BUMCP) neonatal intensive care unit (NICU).