Abstract: A ventilation system for intensified breathing that includes both a manual ventilation system and automatic ventilation system. The gas mixture from a gas supply system is supplied to a switching valve that is operable between a manual position and an automatic position. When the switching valve is in the manual position, the inhalation gas from the supply system is guided to a manual ventilation bag. When the ventilation bag is squeezed during manual inhalation, the gas flow from the manual bag is directed to the inhalation limb of the patient circuit. When the manual ventilation bag is released, the pressure within the ventilation bag falls below the exhalation pressure, thereby indicating the beginning of the exhalation phase and the re-inflation of the manual ventilation.

Abstract: An open ventilation system for intensified breathing that includes both a manual ventilation system and an automatic ventilation system. A ventilation selection switch is positioned in the system prior to the patient circuit to select between the manual and automatic ventilation systems. The manual ventilation system includes a manual bag filling valve that controls the flow of inhalation gases from the ventilation selection switch to a manual bag. The manual bag filling valve includes a valve assembly that is movable between an open position and a closed position based on the difference in the forces created by the pressures of the manual bag and the inhalation gas.