Breathing apparatus for preparing gas mixtures has selection element for target fraction of returned breathing gas between intubation tube and mixing chamber, target feed connection to delivery regulator with target fraction reservoir

摘要

The device has an intubation tube (2), a gas mixing chamber and a pressure generator (4,4'). A selection element with respect to the target fraction of the returned breathing gas from its residual fraction or vice-versa is provided between the intubation tube and the mixing chamber and a target feed connection (7) is connected to a controlled delivery regulator (9) with a target fraction reservoir. An independent claim is also included for a method of reusing and admixing a target fraction in a gas mixture.