Short Term Effects of Synchronized vs. Non-synchronized NIPPV in Preterm Infants.

Comparing the cardio-respiratory adaptation and differences to non invasive ventilation techniques, nasal intermittent positive pressure ventilation (NIPPV) non synchronized vs synchronized (SNIPPV) in preterm newborns (gestational age at birth \< 32 weeks) at their first approach to non invasive ventilation as first intention (soon after birth) or after extubation.