Barometric and volumetric artificial ventilation system for neonatology The Stephanie resuscitation ventilator has all the conventional forms of ventilation. • High Frequency Oscillation (HFO) ventilation is integrated and can be activated at the touch of a button without changing the patient circuit. Thanks to the humidifier/heater, there are no additional compressible volumes that could reduce the efficiency of the HFO. • Stephanie also allows rapid switching between invasive and non-invasive ventilation and optimally promotes the INSURE (INtubation-SURfactant-Extubation) method.