Patient interface and aspects thereof
A patient interface can have a frame supporting a sealing member. Various features of the sealing member can improve comfort and sealing performance in the context of forming seals with the nares of a user, as well as contact with other facial surfaces. The sealing member can include convex portions, concave portions and thickness variations for providing various sealing, comfort, and deformability effects.
1. A nasal seal comprising:
a seal body formed of a soft flexible material and defining an inner cavity that receives a supply of breathing gases, the seal body comprising:
a first nostril prong;
a second nostril prong;
wherein each of the first nostril prong and the second nostril prong are non-conical and asymmetrical; and
a rolling portion defined by a sidewall portion of the seal body and configured to roll over on itself, the rolling portion comprising an upper portion configured to be distal of an upper lip of a user and a lower portion configured to be proximate the upper lip of the user, wherein the upper portion provides less resistance to roll than the lower portion.
2. The nasal seal of claim 1 , wherein the seal body defines a supply opening through which the supply of breathing gases passes into the inner cavity, wherein the supply opening is non-circular in shape.
3. The nasal seal of claim 2 , wherein the supply opening is bean-shaped.
4. The nasal seal of claim 1 , wherein each of the first nostril prong and the second nostril prong comprises a medial portion, wherein the medial portion is oriented at an angle relative to a central plane of the seal body.
5. The nasal seal of claim 4 , wherein the medial portion comprises an upper portion and a lower portion, wherein the angle relative to the central plane of the lower portion is greater than the angle relative to the central plane of the upper portion.
6. The nasal seal of claim 1 , wherein a proximal wall of the seal body comprises a concave portion extending in a lateral direction of the seal body and having a shape that generally conforms to a shape of an upper lip of a user.
7. The nasal seal of claim 1 , wherein the first nostril prong comprises a first sealing surface and the second nostril prong comprises a second sealing surface, wherein portions of the first sealing surface and the second sealing surface are convex.
8. The nasal seal of claim 1 , wherein the seal body comprises a central wall portion extending between and connecting the first nostril prong and the second nostril prong, wherein the central wall portion is spaced deeply from an end surface of the first nostril prong and second nostril prong such that contact between the central wall portion and a septum of a user is reduced or eliminated.
9. The nasal seal of claim 1 , wherein the upper rolling portion has a radial dimension that is larger than a corresponding radial dimension of the lower rolling portion.