Patent ID: 6422237
Filing Date: 2002-07-23
Classification: A61H,A61M

Abstract:
A respirator comprising:a breathing circuit with an inlet branch and an outlet branch; a reversible breathing gas reservoir; a first gas volume flow sensor; a patient connection piece; a first nonreturn valve; a gas delivery element including a rotary compressor, said gas delivery element being connected on an inlet branch to said reversible breathing gas reservoir and being connected on an outlet branch to said patient connection piece for inspiration via said first gas volume flow sensor with said first nonreturn valve; a second nonreturn valve; a controllable shut-off valve connected to said outlet branch providing an open state allowing flow through said outlet branch and a shut state stopping flow through said outlet branch; a connection line between said patient connection piece and a patient being respirated; a second gas volume flow sensor located in said connection line between said patient connection piece and the patient being respirated; a third gas volume flow sensor; said patient connection piece being connected for expiration to said second nonreturn valve via said third gas volume flow sensor and to said reversible breathing gas reservoir via said controllable shut-off valve; and a measuring and control unit connected to said gas volume flow sensors receiving measured signals and sending control signals to said gas delivery element to control a speed of said gas delivery element and to said controllable shut-off valve to control the open and shut state of said controllable shut-off valve.