NIPPV vs CPAP: Lessons from meta-analyses.

Care of the extremely premature infant has been in constant state of re-evaluation as the population, technologies and knowledge continue to evolve. A growing population of extremely low gestational age neonates (ELGAN - <28 weeks) and "nanopremies" (<24 weeks) are undergoing successful resuscitation, stabilization, and intensive care leading to improved survival. Respiratory care is the cornerstone of ELGAN management, as their lungs are at a critical stage of development. The lifesaving intensive care they require can lead to various injurious stimuli making them prone to bronchopulmonary dysplasia (BPD). Non-invasive ventilation (NIV), including continuous positive airway pressure ventilation (CPAP) and nasal intermittent positive pressure ventilation (NIPPV) has evolved and can appropriately support premature infants' breathing, while limiting the invasiveness and associated complications of mechanical ventilation. This review focuses on our current understanding, knowledge and evidence gathered via meta-analysis on these two modes of NIV in preterm infants, when used either as primary intent respiratory support post-birth or following extubation. We will summarize the current data of recent meta-analyses, their pitfalls, and the remaining questions to be addressed by future research to optimize the use of these modes of respiratory support in preterm infants most at risk for BPD.