Nasal mask system

摘要

A nasal cushion for a mask system includes a side wall defining a breathing chamber, an undercushion extending from the side wall, and a membrane that at least partially covers the undercushion. The membrane is adapted to seal along the nasal bridge, sides of nose, corners of nose, and upper lip of the patient's face in use. The undercushion is only provided along the side of nose, corner of nose, and upper lip regions of the cushion. The undercushion includes a flap or extending portion in each side of nose region that is wider than the other regions thereof and adapted to engage and provide a force into the sides of the patient's nose in use.

主权项

1. A nasal cushion for a mask system, the nasal cushion comprising:
a side wall defining a breathing chamber; an undercushion extending from the side wall; and a membrane at least partially covering the undercushion, the membrane being adapted to seal along the nasal bridge, sides of nose, corners of nose, and upper lip of the patient's face in use; wherein the undercushion is only provided along the side of nose, corner of nose, and upper lip regions of the cushion, and wherein the undercushion includes a flap or extending portion in each side of nose region, each flap or extending portion having a length measured from a tip or free end thereof to a connection of the flap or extending portion to the side wall, and the length of the flap or extending portion is longer than a corresponding length of the undercushion in the corner of nose and upper lip regions, the flap or extending portion being adapted to engage and provide a force into the sides of the patient's nose in use.