초록 ▼

An oxygen mixing arrangement for or in a pressure support ventilator, in which a modular oxygen-providing assembly is selectively insertable into a greater respiration apparatus. Mixing accuracy and controllability is maintained by using gas supplies that have a wide range of pressures. Further, oxy

An oxygen mixing arrangement for or in a pressure support ventilator, in which a modular oxygen-providing assembly is selectively insertable into a greater respiration apparatus. Mixing accuracy and controllability is maintained by using gas supplies that have a wide range of pressures. Further, oxygen leakage is minimized by connecting the modular oxygen-providing assembly at a point of the respiration circuit of the greater respiration apparatus that is downstream from a valving arrangement normally used for venting patient exhaust flow and for controlling system pressure by venting excess gas flow to the ambient atmosphere.

대표청구항 ▼

Apparatus for delivering pressurized gas to the airway of a patient, said apparatus comprising: gas flow generator means for providing a flow of said gas; conduit means for delivery of said gas flow to the airway of the patient; said conduit means comprising at least one primary conduit portion for

Apparatus for delivering pressurized gas to the airway of a patient, said apparatus comprising: gas flow generator means for providing a flow of said gas; conduit means for delivery of said gas flow to the airway of the patient; said conduit means comprising at least one primary conduit portion for carrying a primary flow of said gas towards the airway of said patient; means for providing supplemental oxygen to the patient concomitantly with the provision of the primary flow of said gas to the patient; said means for providing supplemental oxygen comprising: means for introducing a flow of supplemental oxygen into said at least one primary conduit portion of said apparatus; means for metering the flow of supplemental oxygen into said at least one primary conduit portion of said apparatus; said metering means comprising means for regulating the flow of supplemental oxygen into said at least one primary conduit portion of said apparatus as a function of at least one of: the magnitude of said primary flow in said at least one main conduit portion; and the direction of said primary flow in said at least one main conduit portion.