Prosthesis, delivery device and methods of use
Devices, systems and methods are described herein a prosthesis for implantation within a lumen or body cavity and delivery devices for delivering the prosthesis to a location for implantation. A delivery system can include a plurality of components which are moveable relative to each other. The delivery system can include a nose cone which can cover at least a first end of the prosthesis, an outer elongate member which can cover at least a second end of the prosthesis, and a tether which can at least partially restrain the prosthesis from deployment.
1. A method of delivering an intralumenal frame assembly to intralumenal tissue at an in situ target location, the method comprising:
delivering an intralumenal frame assembly to the in situ target location while the frame assembly is in a radially compacted state within an outer member, the frame assembly comprising a frame having a first end, a second end and a longitudinal axis extending between the first and second ends, the frame further comprising a tether encircling at least a portion of the frame, the tether configured to restrain the radial dimension of the frame;
at least partially removing the outer member from the frame assembly, wherein the tether restrains the radial dimension of the frame after the outer member is at least partially removed;
releasing the tether from the frame for allowing the second end of the frame to radially expand while the first end of the frame remains radially restrained; and
radially expanding the first end of the frame to allow the second end of the frame to radially expand, wherein the first end of the frame, prior to radial expansion, is restrained by a nose cone covering at least the first end of the frame.
2. The method of claim 1 , wherein the outer member is at least partially removed from the frame assembly by moving the outer member relatively away from the nose cone.
3. The method of claim 2 , wherein the outer member is at least partially removed in a proximal direction from the frame assembly by moving the outer member relatively away from the nose cone.
4. The method of claim 3 , wherein the intralumenal frame assembly comprises a plurality of anchors at its second end, wherein the plurality of anchors extend proximally away from the second end of the frame assembly as the outer member is moved proximally, and the plurality of anchors flip to extend distally away from the second end of the frame assembly after the outer member uncovers the plurality of anchors, and wherein the tether radially restrains the frame assembly during flipping of the anchors.
5. The method of claim 1 , wherein the intralumenal frame assembly comprises a replacement heart valve.
6. The method of claim 1 , wherein the intralumenal frame assembly is delivered transapically to a mitral valve location.
7. The method of claim 1 , wherein the tether is restrained prior to the releasing in a tether retention assembly comprising an inner component and an outer component, the outer component configured to cooperate with the inner component to restrain the tether, wherein the outer component is moveable relative to the inner component.
8. The method of claim 1 , wherein the first end of the frame, prior to radial expansion, is restrained between a nose cone and an inner retention ring.
9. The method of claim 8 , wherein the inner retention ring tapers radially inwards towards a proximal end of the inner retention ring.
10. The method of claim 8 , wherein the inner retention ring comprises a cavity at least partially receiving a compressible member.
11. The method of claim 8 , wherein the inner retention ring comprises a plurality of slots that receive the first end of the frame when the frame assembly is delivered, wherein the first end of the frame comprises a plurality of struts having enlarged tabs.
12. The method of claim 1 , wherein the delivering is performed by a delivery system comprising a handle having a knob configured to translate the outer member.
13. The method of claim 12 , wherein the delivery system comprises a guide member having an aperture, and wherein the tether extends through the aperture.
14. The method of claim 1 , wherein the at least partially removing the outer member allows the portion of the frame to expand to an intermediate expanded position and the releasing the tether allows the portion of the frame to expand to a fully expanded position.
15. A method of delivering an intralumenal frame assembly to intralumenal tissue at an in situ target location, the method comprising:
delivering an intralumenal frame assembly to the in situ target location while the frame assembly is in a radially compacted state within an outer member, the frame assembly comprising a frame having a first end, a second end and a longitudinal axis extending between the first and second ends, the frame further comprising a tether encircling at least a portion of the frame, the tether configured to restrain the radial dimension of the frame;
at least partially removing the outer member from the frame assembly, wherein the tether restrains the radial dimension of the frame after the outer member is at least partially removed; and
releasing the tether from the frame to allow at least a portion of the frame assembly to radially expand, wherein the tether is restrained prior to the releasing in a tether retention assembly comprising a C-lock.
16. A method of delivering an intralumenal frame assembly to intralumenal tissue at an in situ target location, the method comprising:
delivering an intralumenal frame assembly to the in situ target location while the frame assembly is in a radially compacted state within an outer member, the frame assembly comprising a frame having a first end, a second end and a longitudinal axis extending between the first and second ends, the frame further comprising a tether encircling at least a portion of the frame, the tether configured to restrain the radial dimension of the frame;
at least partially removing the outer member from the frame assembly, wherein the tether restrains the radial dimension of the frame after the outer member is at least partially removed; and
releasing the tether from the frame to allow at least a portion of the frame assembly to radially expand,
wherein the delivering is performed by a delivery system comprising a handle having a knob configured to translate the outer member and wherein the delivery system comprises the outer shaft, a locking shaft radially inwards of the outer shaft, an inner retention shaft radially inwards of the locking shaft, and a nose cone shaft radially inwards of the inner retention shaft.