Patent ID: 9566406
Date: 2017-02-14
CPC Classifications: A61M

Claim:
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 to the patient, the patient interface comprising: a cushion with a bladder, the cushion being configured to sealingly engage the patient's face and the bladder being defined by a sidewall with a varied thickness, a portion of the sidewall being configured to seal against the patient's face; a chamber defined at least in part by the cushion, the chamber structured to communicate the positively pressurized breathable gas to the patient's airways; a port configured to convey pneumatic signals corresponding to a first gas pressure in the chamber, the pneumatic signals being indicative of the patient's respiratory phase; and headgear configured to secure the patient interface to the patient's head, wherein the cushion with the bladder is configured to cooperate with the headgear to generate and adjust a force against the patient's face as a function of the pneumatic signals conveyed by the port, the force being sufficient to maintain a seal between the patient's face and the patient interface.