Holders for prosthetic heart valves
First Claim
1. A prosthetic heart valve assembly, comprising:
- a prosthetic heart valve having an inflow end with a peripheral sewing ring, an outflow end, three commissure posts ending in tips projecting in an outflow direction, and three flexible leaflets supported by the commissure posts that coapt against one another to provide one-way occluding surfaces; and
a valve holder comprising;
a commissure post shielding member having a proximal base ring and three circumferentially spaced leg members extending distally therefrom, each leg member having a length sufficient to extend at least partially through the flexible leaflets of the prosthetic valve in the outflow direction with the base ring positioned against the heart valve sewing ring, each leg member having a distal end portion and being moveable between a radially outward position and a radially inward position, wherein when the leg members are in the radially outward positions the distal end portions extend over and shield the tips of the commissure posts so as to extend over and shield the tips of the commissure posts from suture looping during advancement of the heart valve to a site of implantation, and wherein when the leg members are in the radially inward position the distal end portions are spaced radially inward of the commissure tips and can be withdrawn through the prosthetic valve in a direction toward the inflow end, the leg members being biased toward the radially inward position; and
an inner shaft configured to extend through the base ring of the shielding member and between the leg members, the shaft having a shape that contacts the leg members and flexes the distal end portions outward to the radially outward positions, and wherein removal of the shaft in an inflow direction from within the leg members allows the leg members to spring back to the radially inward position, the shaft having a proximal end defining an opening for receiving a delivery tool for manual delivery of the prosthetic heart valve assembly.
1 Assignment
0 Petitions
Accused Products
Abstract
An improved holder and storage system for prosthetic heart valves that pre-shields or pre-constricts the commissure posts of the valve to prevent suture looping. Pre-shielding and pre-constriction mean at the time of manufacture, so that the valves are stored with the commissure posts shielded and/or constricted. The holders may have solid legs that directly contact and constrict and hold the commissure posts without the use of sutures in tension that might creep over the time in storage. The holder may have a base in contact with the inflow end and a shaft portion that projects through the valve leaflets and cooperates with movable legs on the outflow end of the valve in contact with the commissure posts. The holders may, alternatively, have flexible leg members that extend through the valve and have distal end portions configured to extend over and shield the tips of commissure posts.
104 Citations
19 Claims
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1. A prosthetic heart valve assembly, comprising:
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a prosthetic heart valve having an inflow end with a peripheral sewing ring, an outflow end, three commissure posts ending in tips projecting in an outflow direction, and three flexible leaflets supported by the commissure posts that coapt against one another to provide one-way occluding surfaces; and a valve holder comprising; a commissure post shielding member having a proximal base ring and three circumferentially spaced leg members extending distally therefrom, each leg member having a length sufficient to extend at least partially through the flexible leaflets of the prosthetic valve in the outflow direction with the base ring positioned against the heart valve sewing ring, each leg member having a distal end portion and being moveable between a radially outward position and a radially inward position, wherein when the leg members are in the radially outward positions the distal end portions extend over and shield the tips of the commissure posts so as to extend over and shield the tips of the commissure posts from suture looping during advancement of the heart valve to a site of implantation, and wherein when the leg members are in the radially inward position the distal end portions are spaced radially inward of the commissure tips and can be withdrawn through the prosthetic valve in a direction toward the inflow end, the leg members being biased toward the radially inward position; and an inner shaft configured to extend through the base ring of the shielding member and between the leg members, the shaft having a shape that contacts the leg members and flexes the distal end portions outward to the radially outward positions, and wherein removal of the shaft in an inflow direction from within the leg members allows the leg members to spring back to the radially inward position, the shaft having a proximal end defining an opening for receiving a delivery tool for manual delivery of the prosthetic heart valve assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A prosthetic heart valve assembly, comprising:
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a prosthetic heart valve having an inflow end with a peripheral sewing ring, an outflow end, three commissure posts ending in tips projecting in an outflow direction, and three flexible leaflets supported by the commissure posts that coapt against one another to provide one-way occluding surfaces; and a valve holder comprising; a commissure post shielding member having a proximal base ring and three circumferentially spaced leg members extending distally therefrom, each leg member having a length sufficient to extend at least partially through the flexible leaflets of the prosthetic valve in the outflow direction with the base ring positioned against the heart valve sewing ring, each leg member having a distal end portion and being moveable between a radially outward position and a radially inward position, wherein when the leg members are in the radially outward positions the distal end portions extend over and shield the tips of the commissure posts so as to extend over and shield the tips of the commissure posts from suture looping during advancement of the heart valve to a site of implantation, and wherein when the leg members are in the radially inward position the distal end portions are spaced radially inward of the commissure tips and can be withdrawn through the prosthetic valve in a direction toward the inflow end, the leg members being biased toward the radially inward position; and an inner member configured to extend through the base ring of the shielding member and displace the distal end portions of the leg members outward to the radially outward positions, and wherein removal of the inner member in an inflow direction from within the leg members allows the leg members to spring back to the radially inward position, wherein the inner member has a radially projecting tab configured for one-way engagement of the inner member with the shielding member, the tab configured to permit the inner member to be inserted distally through the base ring of the shielding member to move the leg members to the radially outward positions while preventing the inner member from being removed proximally from within the base ring to enable removal of the shielding member along with the inner member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification