US 12,064,348 B2
Multi-layer covering for a prosthetic heart valve
Gil Senesh, Adi (IL); Jeanette Jasmine Corona Kelly, Anaheim, CA (US); and Sandip Vasant Pawar, Irvine, CA (US)
Assigned to EDWARDS LIFESCIENCES CORPORATION, Irvine, CA (US)
Filed by EDWARDS LIFESCIENCES CORPORATION, Irvine, CA (US)
Filed on May 3, 2023, as Appl. No. 18/311,880.
Application 18/311,880 is a continuation of application No. 17/937,538, filed on Oct. 3, 2022.
Application 17/937,538 is a continuation of application No. PCT/US2021/025045, filed on Mar. 31, 2021.
Claims priority of provisional application 63/005,020, filed on Apr. 3, 2020.
Prior Publication US 2023/0270544 A1, Aug. 31, 2023
Int. Cl. A61F 2/24 (2006.01); A61F 2/00 (2006.01)
CPC A61F 2/2418 (2013.01) [A61F 2/0077 (2013.01); A61F 2210/0076 (2013.01); A61F 2250/001 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A prosthetic heart valve, comprising:
a frame comprising a plurality of struts, 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;
a leaflet structure situated at least partially within the frame; and
a sealing member disposed around an outer surface of the frame, the sealing member comprising a knitted fabric layer, the knitted fabric layer comprising:
a base layer forming an inner surface of the knitted fabric layer, wherein the base layer has a mesh-like structure comprising a plurality of courses, each comprising a first base yarn and a second base yarn that are knit together and extending in a first direction, and a plurality of wales formed from a warp yarn and extending in a second direction, wherein each wale comprises a plurality of loops, wherein each loop is knit together with the first base yarn and second base yarn of two adjacent courses; and
a plush outer surface comprising a plurality of pile yarns knit into loops and that extend outward from the base layer, wherein edges of the knitted fabric layer extending around a circumference of the frame and arranged on opposite ends of the knitted fabric layer, the opposite ends arranged along the axial direction, do not include any pile yarns of the plurality of pile yarns, and wherein a thickness of the knitted fabric layer is smaller at the edges than a remainder of the knitted fabric layer that includes the plurality of pile yarns.