Patent ID: 6131571
Filing Date: 2000-10-17
Classification: A61M,Y02C

Abstract:
Apparatus for use as a ventilator and/or an anesthesia delivery system, comprising:a circulation loop connectable to an airway device to which a patient can be connected;a source of positive pressure and a source of negative pressure which are collectively operative to circulate a flow of gas within said circulation loop;a control device having a variable-size orifice, said control device being located in said circulation loop between said airway device and said source of negative pressure;a controller operatively connected to said control device, said controller being effective to selectively cause said variable-size orifice of said device to alternatively create a pressure at said airway device which permits gas to flow into said airway device, and then a pressure at said airway device which permits gas to flow out of said airway device.