Fig. 1

Description of Bag-CPAP. The figure presents Bag-CPAP. The system is composed of the following elements: (i) a connector with a Venturi system (providing the gas at 50% FiO₂ from an oxygen source of 5 L/min, even from an extractor), or a conventional oxygen connector without Venturi (providing the gas at > 90% FiO₂ from an oxygen source of 15 L/min); (ii) a 30L reservoir to cover patients respiratory demand; (iii) two 3D printed pieces (safety pressure valve and non-rebreathing valve) to connect the patient circuit to the reservoir and to the patient mask; (iv) a positive expiratory pressure valve to deliver PEEP between 5 and 10 cm H₂O