Patent ID: 7559327
Filing Date: 2009-07-14
Classification: A61M

Abstract:
1. An interface, comprising: a cannula having a hollow, arcuate body and a semi-cylindrical bottom wall defining an air chamber, the hollow, arcuate body having cylindrical tubes at opposing ends of the body adapted for connection to gas supply tubes; at least one nasal insert having a base end connected to a top wall of the cannula and having an open distal tip end; and at least one exhaust port having an adjustable aperture with a cross-sectional area, wherein the cross-sectional area of the aperture is adjustable and wherein the adjustable aperture of the at least one exhaust port is adjusted by moving a tab in a slide that moves a seal a proportional distance over the adjustable aperture of the at least one exhaust port, wherein the slide includes a linear opening defined in the cannula where the tab is adjusted and wherein the linear opening is adjacent to the adjustable aperture; the at least one nasal insert being formed in a shape such that it is adapted to be retained in nares of a user through friction and lateral pressure of gas flow.