Patent ID: 11931512
Assignee: RESMED PTY LTD
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 22:
23. A patient interface comprising:
a plenum chamber pressurisable to a therapeutic pressure of at least 6 cmH2O above ambient air pressure, said plenum chamber including a plenum chamber inlet port sized and structured to receive a flow of air at the therapeutic pressure for breathing by a patient;
a first seal-forming structure connected to an oral portion of the plenum chamber, the first seal-forming structure constructed and arranged to form a seal with a region of the patient's face surrounding an entrance to the patient's mouth such that the flow of air at said therapeutic pressure is delivered to the mouth, the first seal-forming structure constructed and arranged to maintain said therapeutic pressure in the plenum chamber throughout the patient's respiratory cycle in use;
a second seal-forming structure connected to a nasal portion of the plenum chamber, the second seal-forming structure constructed and arranged to form a seal with a region of the patient's face surrounding an entrance to the patient's nose such that the flow of air at said therapeutic pressure is delivered to the nose, the second seal-forming structure constructed and arranged to maintain said therapeutic pressure in the plenum chamber throughout the patient's respiratory cycle in use; and
a vent structure to allow a continuous flow of gases exhaled by the patient from an interior of the plenum chamber to vent to ambient, said vent structure being sized and shaped to maintain the therapeutic pressure in the plenum chamber in use;
wherein;
a boundary between the first seal-forming structure and the second seal-forming structure comprises a ridge;
a pair of support portions extends from the ridge in an anterior direction, the ridge being configured to engage the patient's face proximate the entrances to the patient's nares, where the ala meets the face above the lip superior, each of the support portions having an approximate width that is limited to a width of the corner of the patient's nose; and

the patent interface is configured such that no part contacts the patient's alar crest point, in use.