Apparatus for the supply of a breathing gas

摘要

An apparatus for supplying a breathing gas to a patient comprising a supply means (1) for generating a flow of breathable gas during an inspiration and an expiration phase of a patient breathing cycle. An inspiration line (24) is provided having an inlet (20) through which a flow of breathing gas from the supply means (1) can pass as well as an expiration line (25) through which an expiration gas from the patient can flow. A flow controller (26) is provided for selecting during an inspiration phase a first flow path for gas from the supply means (1) into the inlet (20) and for selecting during the expiration phase a second flow path for gas from the supply means (1) in a direction across a venturi outlet (21) of the expiration line (25) to enhance removal of expiration gas therefrom by venturi suction.