Infant ventilators provide respiratory support for premature or critically ill newborns unable to breathe adequately due to respiratory distress syndrome, meconium aspiration, or apnea. Conventional mechanical ventilators deliver synchronized breaths (SIMV/ACV modes) via endotracheal tubes, matching infant efforts to minimize lung injury; high-frequency ventilators (HFOV/HFJV) use rapid tiny oscillations (600-900/min) for gas exchange in severe cases like ARDS. Non-invasive options like nasal CPAP/NIPPV support spontaneously breathing preemies. Features include volume guarantee (2-15 mL/kg), low tidal volumes, and integrated monitors for FiO2, PIP, PEEP. Used in NICUs until lung maturity develops.