NZ783537B2 - Oro-Nasal Patient Interface - Google Patents

Abstract

Disclosed is a patient interface for treating breathing and respiratory disorders for use for CPAP delivery while sleeping and providing an effective seal against a patient’s face includes a frame made from a textile material, having a predetermined three-dimensional shape that is maintained throughout the patient’s respiratory cycle, 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. The frame is more rigid than the seal-forming structure to support the seal-forming structure in use.

Claims (15)

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 the 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 cmH2O to about 30 cmH2O 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 frame made from a textile material, the frame having a predetermined three- dimensional shape that is maintained throughout the patient’s respiratory cycle; and a seal-forming structure provided to the frame, the seal-forming structure including 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, and the seal-forming structure further including 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, wherein the nasal cushion includes a foam material and a textile material, a surface of the textile material configured to contact the patient’s face to create a seal against the patient’s face, wherein the mouth cushion includes a foam material, a surface of the foam material of the mouth cushion configured to contact the patient’s face to create a seal against the patient’s face, and wherein the frame is more rigid than the seal-forming structure to support the seal-forming structure in use.

2. The patient interface according to claim 1, wherein the seal-forming structure is configured and arranged to form a compression-type seal against the patient’s face.

3. The patient interface according to any one of claims 1 to 2, wherein the textile material of the nasal cushion is air impermeable.

4. The patient interface according to any one of claims 1 to 3, wherein the textile material of the nasal cushion includes two separate openings.

5. The patient interface according to any one of claims 1 to 4, wherein the textile material of the nasal cushion is structured to inflate and displace relative to the foam material of the nasal cushion during therapy in order to provide a pressure activated seal against the patient’s face in an area proximal the patient’s nose.

6. The patient interface according to any one of claims 1 to 5, wherein the nasal cushion is structured to seal around the ala and tip of the patient’s nose.

7. The patient interface according to any one of claims 1 to 6, 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.

8. The patient interface according to any one of claims 1 to 7, wherein the textile material of the frame is air impermeable.

9. The patient interface according to any one of claims 1 to 8, wherein the frame is structured to impart a predetermined three-dimensional shape to the seal-forming structure.

10. The patient interface according to any one of claims 1 to 9, wherein the frame includes upper and lower headgear connectors to provide a 4-point connection to a positioning and stabilising structure to hold the seal-forming structure in sealing position in use.

11. The patient interface according to claim 10, wherein the positioning and stabilising structure includes upper side straps each arranged to extend between the patient’s ear and eye and provide an upper force vector that extends upwardly at an angle with respect to the Frankfort horizontal line, and the positioning and stabilising structure includes lower side straps each arranged to extend below the patient’s ear and provide a lower force vector that extends generally parallel to the Frankfort horizontal line.

12. The patient interface according to any one of claims 1 to 11, wherein the frame includes a vent.

13. The patient interface according to any one of claims 1 to 12, wherein the frame is formed into the predetermined three-dimensional shape by joining pieces of textile material together or thermoforming a textile material.

14. The patient interface according to any one of claims 1 to 13, wherein the textile material of the frame includes a structure of a textile scaffold, mesh, netting or webbing.

15. 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 that is integrated or provides an interface with the frame and/or the seal-forming structure.