Covered prosthetic heart valve
A prosthetic heart valve includes a frame that is radially collapsible and expandable between a collapsed configuration and an expanded configuration, and defines a longitudinal axis. A leaflet structure situated within the frame, and a sealing member is disposed around the frame. The sealing member can include a first portion extending circumferentially around a portion of the frame, the first portion being configured to resiliently stretch in a direction along the longitudinal axis between a first state corresponding to the expanded configuration of the frame and a second state corresponding to the collapsed configuration of the frame. The sealing member can include a second portion extending circumferentially around a portion of the frame, the second portion being configured to resiliently stretch in a circumferential direction between a first state corresponding to the collapsed configuration of the frame and a second state corresponding to the expanded configuration of the frame.
1. A prosthetic heart valve, comprising:
a frame comprising a plurality of strut members, the frame being radially collapsible and expandable between a collapsed configuration and an expanded configuration, the frame having an inflow end and an outflow end, and defining a longitudinal axis;
a leaflet structure situated at least partially within the frame; and
a sealing member disposed around the frame, the sealing member comprising:
a first portion extending circumferentially around at least a portion of the frame, the first portion being resiliently stretchable primarily in a direction along the longitudinal axis of the frame between a first state corresponding to the expanded configuration of the frame and a second state corresponding to the collapsed configuration of the frame; and
a second portion extending circumferentially around at least a portion of the frame and circumferentially offset from the first portion of the sealing member around the frame, the second portion being resiliently stretchable primarily in a circumferential direction between a first state corresponding to the collapsed configuration of the frame and a second state corresponding to the expanded configuration of the frame.
2. The prosthetic heart valve of claim 1 , wherein the first portion comprises a resiliently stretchable portion that is stretchable in the direction along the longitudinal axis of the frame.
3. The prosthetic heart valve of claim 2 , wherein the resiliently stretchable portion of the first portion comprises texturized yarns extending in the direction along the longitudinal axis of the frame.
4. The prosthetic heart valve of claim 3 , wherein:
the first portion further comprises a first woven portion and a second woven portion spaced apart from the first woven portion in a direction along the longitudinal axis of the frame; and
the texturized yarns extend between the first woven portion and the second woven portion and form a floating yarn portion between the first woven portion and the second woven portion without being interwoven with other yarns in the floating yarn portion.
5. The prosthetic heart valve of claim 4 , wherein the texturized yarns are configured to provide compressible volume to the floating yarn portion of the sealing member when the frame is in the expanded configuration.
6. The prosthetic heart valve of claim 4 , wherein the texturized yarns are woven into a leno weave pattern in the first woven portion and in the second woven portion.
7. The prosthetic heart valve of claim 4 , wherein the floating yarn portion is one of a plurality of floating yarn portions of the first portion of the sealing member, the plurality of floating yarn portions being spaced apart from each other along the longitudinal axis of the frame.
8. The prosthetic heart valve of claim 4 , wherein:
the second portion is a first circumferentially resilient portion configured to resiliently stretch in the circumferential direction; and
the sealing member further comprises a second circumferentially resilient portion on an opposite side of the floating yarn portion from the first circumferentially resilient portion such that the first circumferentially resilient portion and the second circumferentially resilient portion are axially offset from each other along the longitudinal axis of the frame.
9. The prosthetic heart valve of claim 1 , wherein the second portion comprises a resiliently stretchable portion that is stretchable in a circumferential direction around the frame.
10. The prosthetic heart valve of claim 9 , wherein the resiliently stretchable portion of the second portion comprises texturized yarns extending in a circumferential direction around the frame.
11. The prosthetic heart valve of claim 10 , wherein:
the second portion further comprises a first woven portion and a second woven portion spaced apart from the first woven portion in a circumferential direction around the frame; and
the texturized yarns extend between the first woven portion and the second woven portion and form a floating yarn portion between the first woven portion and the second woven portion without being interwoven with other yarns in the floating yarn portion.
12. The prosthetic heart valve of claim 1 , wherein:
the second portion comprises a plurality of first strands interwoven with a plurality of second strands; and
an angle formed between the first strands and the second strands changes as the frame moves between the collapsed configuration and the expanded configuration.
13. The prosthetic heart valve of claim 12 , wherein:
when the frame is in the collapsed configuration, the first strands and the second strands form a first angle and the second portion has a first arc length; and
when the frame is in the expanded configuration, the first strands and the second strands form a second angle and the second portion has a second arc length that is greater than the first arc length.
14. The prosthetic heart valve of claim 1 , wherein:
the sealing member comprises an axial dimension in a direction along the longitudinal axis of the frame; and
the sealing member remains in contact with the frame along substantially its entire axial dimension between the collapsed configuration and the expanded configuration.
15. The prosthetic heart valve of claim 1 , wherein the first portion of the sealing member is directly secured to the frame, and the second portion of the sealing member is coupled to the first portion but not directly secured to the frame.
16. The prosthetic heart valve of claim 1 , wherein the first portion of the sealing member extends around a portion of a circumference of the frame, and the second portion of the sealing member extends around the remainder of the circumference of the frame.
17. A prosthetic heart valve, comprising:
a frame comprising a plurality of strut members, the frame being radially collapsible and expandable between a collapsed configuration and an expanded configuration, the frame having an inflow end and an outflow end, and defining a longitudinal axis;
a leaflet structure situated at least partially within the frame; and
a sealing member disposed around the frame, the sealing member comprising:
a first portion extending circumferentially around at least a portion of the frame, the first portion comprising a plurality of texturized yarns extending along the longitudinal axis of the frame and configured to resiliently lengthen in a direction primarily along the longitudinal axis between a first state and a second state as the frame moves between the expanded configuration and the collapsed configuration;
a second portion extending circumferentially around at least a portion of the frame and offset circumferentially around the frame from the first portion of the sealing member, the second portion comprising a plurality of texturized yarns extending in a circumferential direction around the frame, the texturized yarns of the second portion being configured to resiliently lengthen primarily in the circumferential direction between a first state and a second state as the frame moves between the collapsed and the expanded configurations.
18. The prosthetic heart valve of claim 17 , wherein:
the first portion further comprises a first woven portion and a second woven portion spaced apart from the first woven portion in the direction along the longitudinal axis of the frame; and
the texturized yarns of the first portion extend between the first woven portion and the second woven portion and form a floating yarn portion between the first woven portion and the second woven portion.
19. The prosthetic heart valve of claim 18 , wherein the texturized yarns are configured to provide compressible volume to the floating yarn portion when the frame is in the expanded configuration.
20. The prosthetic heart valve of claim 18 , wherein the texturized yarns are woven into a leno weave pattern in the first woven portion and in the second woven portion.
21. The prosthetic heart valve of claim 17 , wherein:
the second portion further comprises a first woven portion and a second woven portion spaced apart from the first woven portion in the circumferential direction around the frame; and
the texturized yarns of the second portion extend between the first woven portion and the second woven portion and form a floating yarn portion between the first woven portion and the second woven portion.
22. A prosthetic heart valve, comprising:
a frame comprising a plurality of strut members, the frame being radially collapsible and expandable between a collapsed configuration and an expanded configuration, the frame having an inflow end and an outflow end, and defining a longitudinal axis;
a leaflet structure situated at least partially within the frame; and
a sealing member disposed around the frame, the sealing member comprising:
a first portion extending circumferentially around at least a portion of the frame, the first portion comprising a floating yarn portion configured to resiliently lengthen primarily in a direction along the longitudinal axis of the frame between a first state and a second state as the frame moves between the expanded configuration and the collapsed configuration;
a second portion extending circumferentially around at least a portion of the frame and offset circumferentially around the frame from the first portion of the sealing member, the second portion comprising a floating yarn portion configured to resiliently lengthen primarily in the circumferential direction between a first state and a second state as the frame moves between the collapsed configuration and the expanded configuration.