Patient interface with a seal-forming structure having varying thickness
First Claim
1. 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 the 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, the cushion assembly comprising:
- an elastomeric seal-forming portion shaped to be bisected by a sagittal plane that includes a line tangent to the elastomeric seal-forming portion at a superior tangent point and an inferior tangent point,wherein the elastomeric seal-forming portion comprises;
a dome-shaped superior region that straddles the sagittal plane in the vicinity of the superior tangent point,a saddle-shaped inferior region that straddles the sagittal plane and includes the inferior tangent point,a first support region extending from the saddle-shaped inferior region to the dome-shaped superior region, the first support region having a consistent elastomeric wall thickness that is greater than an elastomeric wall thickness of the dome-shaped superior region and the saddle-shaped inferior region, anda second support region adjacent the first support region that extends from the saddle-shaped inferior region to the dome-shaped superior region, the second support region being bounded by the first support region on a proximal side and having a distal side opposite the proximal side, an elastomeric wall thickness in the second support region increases from the distal side to the proximal side.
2 Assignments
0 Petitions
Accused Products
Abstract
A cushion assembly for a patient interface includes an elastomeric seal-forming portion that includes a dome-shaped superior region (3180A); a saddle-shaped inferior region (3180G); a first support region (3180E) having a consistent wall thickness, preferably 2 mm, that is greater than the wall thickness of the dome-shaped superior and the saddle-shaped inferior regions, preferably 0.3 mm; a second support region (3180D) having a varied wall thickness and is bounded by the first support region (3180E) on a proximal side and having a distal side opposite the proximal side. In claim 1, the wall thickness in the second support region (3180D) increases from the distal side to the proximal side, preferably 2 to 1.3 mm. Preferably, wall thickness of a third support region (3180F) is 1.3 mm, a compliant region (3180C) is 0.85 mm and a flap (3180H) is 0.5 mm. Preferably flap (3180H) moves independently of a loop connection (3110).
45 Citations
38 Claims
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1. 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 the 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, the cushion assembly comprising:
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an elastomeric seal-forming portion shaped to be bisected by a sagittal plane that includes a line tangent to the elastomeric seal-forming portion at a superior tangent point and an inferior tangent point, wherein the elastomeric seal-forming portion comprises; a dome-shaped superior region that straddles the sagittal plane in the vicinity of the superior tangent point, a saddle-shaped inferior region that straddles the sagittal plane and includes the inferior tangent point, a first support region extending from the saddle-shaped inferior region to the dome-shaped superior region, the first support region having a consistent elastomeric wall thickness that is greater than an elastomeric wall thickness of the dome-shaped superior region and the saddle-shaped inferior region, and a second support region adjacent the first support region that extends from the saddle-shaped inferior region to the dome-shaped superior region, the second support region being bounded by the first support region on a proximal side and having a distal side opposite the proximal side, an elastomeric wall thickness in the second support region increases from the distal side to the proximal side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. 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 the 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, the cushion assembly comprising:
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an elastomeric seal-forming structure shaped to be bisected by a sagittal plane that includes a line tangent to the elastomeric seal-forming structure at a superior tangent point and an inferior tangent point, the elastomeric seal-forming structure comprising; a posterior central opening and an anterior central opening opposite the posterior central opening, the elastomeric seal-forming structure including a plurality of closed paths concentric to the posterior central opening; a dome-shaped superior region that straddles the sagittal plane in the vicinity of the superior tangent point, the dome-shaped superior region being positioned on the outermost closed path; a saddle-shaped superior region that straddles the sagittal plane in the vicinity of the superior tangent point, the saddle-shaped superior region being positioned on the innermost closed path; a saddle-shaped inferior region that straddles the sagittal plane and includes the inferior tangent point, the saddle-shaped inferior region being on both the innermost closed path and the outermost closed path; wherein an elastomeric wall thickness of the elastomeric seal-forming structure is invariable along a portion of the outermost closed path extending from the saddle-shaped inferior region to the dome-shaped superior region; and wherein the elastomeric wall thickness of the elastomeric seal-forming structure varies along a portion of the innermost closed path that extends from the saddle-shaped inferior region to the saddle-shaped superior region. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. 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 the 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, the cushion assembly comprising:
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an elastomeric seal-forming structure that is shaped to be bisected by a sagittal plane that has a line that is tangent to the elastomeric seal-forming structure at a superior tangent point and at an inferior tangent point, wherein a first nasal bridge region of the elastomeric seal-forming structure straddles the sagittal plane in the vicinity of the superior tangent point, wherein a second nasal bridge region of the elastomeric seal-forming structure straddles the sagittal plane in the vicinity of the superior tangent point and is configured to seal against the patient'"'"'s nasal bridge when the cushion is mounted on the patient'"'"'s face, the second nasal bridge region having a thinner elastomeric wall than the first nasal bridge region, wherein a chin region of the elastomeric seal-forming structure straddles the sagittal plane and includes the inferior tangent point, the chin region being configured to engage the patient'"'"'s chin when the cushion is mounted on the patient'"'"'s face, the chin region having the same elastomeric wall thickness as the first nasal bridge region, wherein a first support region and a second support region are positioned side by side and both extend from the chin region to the first nasal bridge region, the first support region having a consistent elastomeric wall thickness, and the second support region having a varied elastomeric wall thickness. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification