Abstract: A resuscitation system including a device or kit adapted for connection to a gas outlet of a resuscitation bag with a first gas inlet thereto and upstream of a face mask, the device or kit providing gas flow in a path from the bag to the mask. A check valve is operably connected to the gas outlet of the resuscitation bag and substantially blocking gas flow upstream thereof and allowing gas flow downstream thereof. A first safety release valve operably located downstream of the resuscitation bag and operable to release gas from the gas flow path at a predetermined pressure differential between the path and ambient. The first safety release valve is located downstream of the check valve.