Abstract: The invention concerns a manual artificial respiration bag (1) for ventilating a patient in need thereof, comprising a deformable bag (10) with a gas inlet (11), a gas outlet (12) and an inner volume (13) for a respiratory gas; an upstream conduct element (20) fluidly connected to the gas inlet (11) of the deformable bag (10), and comprising a gas entry port (21); and a downstream conduct element (30) fluidly connected to the gas outlet (12) of the deformable bag (10), comprising an exhaust valve (35) comprising an exhaust port (36). A venturi device (50) comprising a main body (110) comprising a venturi nozzle (120); at least one oxygen inlet (131) for providing oxygen; at least one air inlet (132) for providing air; a mixing chamber (133) for mixing therein oxygen and air and obtaining an air/oxygen mixture; and gas selection means (110, 130) for selecting oxygen or an air/oxygen mixture as a desired gas to be provided to the venturi nozzle (120).

Abstract: The invention concerns a Venturi device (1) for delivering oxygen or an air/oxygen mixture comprising a main body (10) with an inner compartment (11) and a Venturi nozzle (20); a rear member (30) with an oxygen inlet (31), air inlets (32) and a mixing chamber (33) for mixing oxygen and air. The rear member (30) is mobile with respect to the main body (10) between a closed position wherein the rear member (30) provides oxygen to the Venturi nozzle (20), and an open position wherein the rear member (30) provides an air/oxygen mixture to the Venturi nozzle (20). The rear member (30) is mobile at least in rotation with respect to the main body (10) for allowing a user to manually select a desired open or closed position, preferably according to a helicoidal motion. Installation (100) for providing oxygen or an air/oxygen mixture to a patient comprising a gas reservoir (101), a flexible hose (103), a respiratory interface (104), a connecting hollow body (102), and such a Venturi device (1).