Nasal assembly

A nasal pillows mask assembly for providing a supply of air at positive pressure to the entrance of a patient's airways, the nasal pillows mask assembly comprising:

• (i) a nasal pillows assembly defining a chamber comprising:
• a pair of nasal pillows including:
• a first portion of reduced cross-section connected at a first end to a base portion and structured to allow for relative movement with respect to the base portion, and to be pre-loaded against the patient's nostril;
• a second portion connected to a second end of the first portion, the second portion having a narrower first end that enters the nasal passage of the patient's nose in use and a wider second end, the second portion defining a surface upon at least a portion of which sealing occurs with a patient's nares on the underside of the nostrils in an area about the rim of the nostril openings in use;
• and a base portion constructed of a deformable, resilient and flexible material including sidewalls having a generally thicker end adapted for connection to a frame and decreasing in thickness to a thinner central portion, the sidewalls being arranged to act as a spring structure to provide a component of force on the patient's face through the nasal pillows;
• (ii) a frame to which the nasal pillows assembly is connected;
• (iii) headgear assembly connected to the frame and structured to retain the frame in position on the face of a patient;
• and
• (iv) an air delivery conduit adapted to receive a supply of air at positive pressure and direct it to the chamber.

A nasal assembly for providing a supply of air at positive pressure to the entrance of a patient's airways for nasal continuous positive airway pressure treatment of sleep disordered breathing comprising:

• (i) an air delivery conduit to receive a supply of air at positive pressure;
• (ii) a rigid or semi-rigid frame to which the air delivery conduit is connected;
• (iii) headgear to hold the frame in position on the face of a patient and to provide a headgear tension;
• (iv) a nozzle structure connected to the frame, the nozzle structure comprising:
• a pair of nozzles having a first portion arranged to form a spring structure and a cone-shaped portion part of which is arranged to form a seal on the underside of the nostrils in an area about the rim of the nostril openings and another part of which is arranged to enter into the nasal passage of the patient's nose in use;
• and
• a deformable base portion,
• the base portion having a central wall portion to which the pair of nozzles are connected, and side wall portions;
• the base portion being structured to form a decoupling joint between the frame and the nozzles to provide relative movement between the nasal assembly and the users face,
• the base portion further comprising a lower contour portion adapted to transfer a portion of the headgear tension to the face in use.

A nasal interface for delivering pressurized breathable gas to a user, comprising:

• a support frame;
• a silicone nozzle structure including a base portion and a pair of nozzles, the nozzle structure being removably coupled to the support frame with the pair of nozzles structured to sealingly engage with nasal passages of a user's nose in use;
• and
• a headgear to support the support frame and nozzle structure on the user's face,
• wherein a front wall of the base portion is configured to contact an immediate underside of the user's nose, whereby a resultant force is directed along a line extending from the immediate underside to a rear portion of the user's head, between the eye and the ear of the user in use.