Vesalius was the first to introduce positive pressure ventilation. General principles:Positive pressure ventilation creates a pressure that can carry a volume of gas into the lungs.In control ventilation, the current volume is pre-adjusted by the ventilator and has a set pressure and speed.In control compression ventilation, the pressure is preset and the expansion time is reached until the specified current volume is reached.In volume control ventilation, the airway pressure is uniformly increased to reach the specified volume.