PATIENT INTERFACE

• Main Authors: EVES, Matthew, GOLDSPINK, Lachlan Richard
• Format: Patent
• Language: English; French; German
• Published: 28.08.2024
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

The present invention relates to a plenum chamber for a patient interface. The plenum chamber is pressurisable to a therapeutic pressure of at least 6 cmH20 above ambient air pressure. The plenum chamber comprises one or more walls at least partially enclosing a volume of space and one or more plenum chamber inlet ports sized and structured to receive a flow of air at the therapeutic pressure for breathing by a patient. The plenum chamber also has a 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 airways. Said seal-forming structure has one or more holes therein such that the flow of air at said therapeutic pressure is delivered to an entrance to the patient's nares and to the patient's mouth via the one or more holes. The seal-forming structure is constructed and arranged to maintain said therapeutic pressure in the plenum chamber throughout the patient's respiratory cycle in use. The seal-forming structure comprises a nasal portion comprising a central portion configured to form a seal to an inferior periphery of the patient's nose surrounding the patient's nares and to the lip superior in use. The seal-forming structure does not lie over a nose ridge region of the patient's face. The seal-forming structure further comprises a pair of superior-facing intermediate portions configured to be located proximate to the patient's ala in use, the seal-forming structure having a greater thickness in the superior-facing intermediate portions than in the central portion. The seal-forming structure also comprises a pair of lateral-facing posterior portions on lateral non-patient facing regions of the nasal portion, the lateral-facing posterior regions comprising a greater thickness than the superior-facing intermediate portions.