Oro-nasal patient interface
A patient interface includes a frame including a textile material and a seal-forming structure provided to the frame. The seal-forming structure includes a foam material and/or a foam and textile material configured and arranged to form a seal with the patient's nose and/or mouth.
1. 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;
said patient interface comprising:
a seal-forming structure configured and arranged to form a seal against the patient's face,
wherein the seal-forming structure includes a foam material and a textile material, the textile material comprising a seal-forming surface configured and arranged to sealingly engage the patient's face,
wherein the foam material includes a patient facing surface configured and arranged to face the patient in use,
wherein an outer perimeter of the textile material is joined to the patient facing surface of the foam material,
wherein at least a portion of the textile material is unattached to the patient facing surface of the foam material to allow the flow of air at the therapy pressure to enter between the textile material and the patient facing surface of the foam material during therapy, which allows the textile material to inflate and displace relative to the patient facing surface of the foam material during therapy in order to provide a pressure activated seal against the patient's face.
2. The patient interface according to claim 1 , further comprising a frame made from a textile material, wherein the seal-forming structure is provided to the frame, and wherein the frame has a predetermined three-dimensional shape that is maintained throughout the patient's respiratory cycle.
3. The patient interface according to claim 1 , wherein the seal-forming structure includes a nasal cushion configured and arranged to form a seal around a lower portion of the patient's nose below the patient's nasal bridge.
4. The patient interface according to claim 3 , wherein the nasal cushion is structured to seal around the ala and tip of the patient's nose.
5. The patient interface according to claim 3 , wherein the nasal cushion comprises said foam material and said textile material.
6. The patient interface according to claim 5 , wherein the textile material of the nasal cushion includes two separate openings and the foam material of the nasal cushion includes two separate openings, and the two separate openings of the textile material of the nasal cushion substantially aligns with the two separate openings of the foam material of the nasal cushion.
7. The patient interface according to claim 5 , wherein the foam material of the nasal cushion comprises a bridge portion.
8. The patient interface according to claim 7 , wherein the bridge portion does not form a seal with the patient's face, in use.
9. The patient interface according to claim 5 , wherein the seal-forming structure further includes a mouth cushion configured and arranged to form a seal around at least a portion of the patient's mouth at least along the sides of the mouth and along the lower lip/chin region.
10. The patient interface according to claim 9 , wherein the mouth cushion comprises a foam material.
11. The patient interface according to claim 10 , wherein the mouth cushion further comprises a textile material.
12. The patient interface according to claim 10 , wherein the textile material of the nasal cushion forms at least one opening to deliver the flow of air to the patient's nares, and the foam material of the mouth cushion forms an opening to deliver the flow of air to the patient's mouth, and the at least one opening of the textile material of the nasal cushion is separate and distinct from the opening of the foam material of the mouth cushion.
13. The patient interface according to claim 9 , wherein the mouth cushion is structured to seal around the mouth from the left lower nose corner to the right lower nose corner via the chin cleft.
14. The patient interface according to claim 1 , wherein at least one side of the textile material includes an air impermeable surface which allows the textile material to inflate and displace relative to the foam material of the nasal cushion during therapy.
15. The patient interface according to claim 14 , wherein the air impermeable surface comprises a silicone layer.
16. The patient interface according to claim 14 , wherein the air impermeable surface is on a non patient contacting side of the textile material.
17. The patient interface according to claim 1 , wherein inflation and displacement of the textile material relative to the foam material during therapy allows sealing even when the patient's face is displaced or spaced from the foam material.
18. The patient interface according to claim 1 , further comprising a positioning and stabilising structure to hold the seal-forming structure in sealing position in use, at least a portion of the positioning and stabilising structure including a textile material.
19. The patient interface according to claim 18 , wherein the textile material of the positioning and stabilising structure is integrated or provides an interface with the seal-forming structure and/or a frame that supports the seal-forming structure.
20. The patient interface according to claim 1 , further comprising a frame structured to impart a predetermined three-dimensional shape to the seal-forming structure.