Patent ID: 9095673
Filing Date: 2015-08-04
Classification: A61M

Abstract:
1. A patient interface for delivering breathable gas at a continuously positive pressure with respect to ambient air pressure to an entrance of a patient's airways including at least an entrance of the patient's nares, throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the patient interface comprising: a sealing portion including a nose tip engagement portion adapted to form a seal with the patient's nose tip, an upper lip engagement portion adapted to form a seal with the patient's upper lip and/or base of the patient's nares, and nostril engagement flaps adapted to form a seal with the patient's nares; headgear structured to maintain the sealing portion in sealing contact with an area surrounding an entrance to the patient's airways while maintaining said positive pressure at the entrance to the patient's nares; and a plenum chamber defined by a supporting wall and configured to be pressurized at said positive pressure, wherein the nose tip engagement portion and the upper lip engagement portion are structured to extend or curve outwardly from the supporting wall, wherein the nostril engagement flaps are cantilevered from the supporting wall so that the nostril engagement flaps flex outwardly away from each other when engaged with the patient's nose, and wherein at least one of the headgear and the supporting wall is configured to limit the extent to which the nostril engagement flaps flex and prevents an angle between the nostril engagement flaps from reaching 180°.