Patient interface with foam seal-forming structure

• Main Authors: Nga, Lemmy, Day, Shannon, Rummery, Gerard Michael, Eves, Matthew, Scheiner, Rupert
• Format: Patent
• Language: English
• Published: 30.08.2024
• 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

A cushion assembly for a patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to a patient's airways including at least entrance of a patient's nares, wherein the patient interface is configured to maintain a therapy pressure in a range of about 4 cmH20 to about 30 cmH20 above ambient air pressure in use, throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the cushion assembly comprising: a foam cushion; and an elastomeric support portion configured to support the foam cushion and form at least part of a chamber together with the foam cushion, the elastomeric support portion comprising: a support structure that forms a continuous perimeter around the chamber; and a resiliently flexible folded section that forms a pivotable seat for the foam cushion and extends from the support structure toward an interior of the chamber, an outer perimeter of the folded section being anchored to the support structure so that the outer perimeter of the folded section is fixed relative to the support structure while an inner perimeter of the folded section is movable relative to the support structure, wherein the folded section further comprises a reinforced section with a supplemental support that anchors a span of the folded section to the support structure, wherein the reinforced section of the folded section is located at a region of the cushion assembly that is configured to be laterally adjacent to the patient's nasal ridge when the cushion assembly is mounted on the patient's face, and wherein the cushion assembly is bisected by a sagittal plane having a line that is tangent to the foam cushion only at a superior tangent point and an inferior tangent point.