Patent ID: 8381723

Claim:
A breathing assistance apparatus comprising: a pressurized gas source; a container comprising a liquid; and a conduit including proximal and distal ends, the proximal end adapted for connection to the pressurized gas source, and the distal end of the conduit configured to be submerged in the liquid, the conduit also adapted for connection to a patient interface intermediate the proximal and distal ends of the conduit, wherein the distal end of the conduit that is configured to be submerged in the liquid comprises an angle that is greater than 90 degrees and less than 270 degrees with respect to a vertical axis defined by gravity and pointing toward the Earth's center of mass, wherein 0 degrees corresponds to the exit portion of the distal end of the conduit being oriented straight down toward the Earth's center of mass, and 180 degrees corresponds to the to the exit portion of the distal end of the conduit being oriented straight up, away from the Earth's center of mass.