Delivery systems for prosthetic heart valves
A delivery system for delivery of an implantable stented device to a body lumen, the device having a plurality of structures at its proximal end, wherein the delivery system comprises a first body portion removably attached to a second body portion and wherein the second body portion includes a plurality of attachment components at its distal end for attachment to the plurality of structures at the proximal end of the device.
1. A delivery system for delivery of an implantable stented device to a body lumen, the device comprising a plurality of structures at a proximal end of the device, wherein the delivery system comprises:
a first body portion comprising an outer tube from which an inner actuation member extends, the inner actuation member being slidable relative to the outer tube and comprising a distal end; and
a second body portion removably attached to the first body portion, wherein the second body portion comprises;
a wire assembly including a wire base portion and a plurality of wires extending distally from the base portion, wherein each wire comprises a distal end for attachment to the plurality of structures at the proximal end of the stented device, the outer tube of the first body portion being configured to removably engage the wire assembly, and
a sleeve assembly including a sleeve base portion and a plurality of sleeves, each of the plurality of sleeves at least partially surrounding one of the wires and being axially slideable relative to the distal end of the wire that it surrounds, the inner actuation member of the first body portion being configured to removably engage the sleeve assembly,
wherein with the outer tube engaged with the wire assembly and the inner actuation member engaged with the sleeve assembly, movement of the inner actuation member relative to the outer tube causes each of the plurality of sleeves to axially slide relative to the distal end of the wire it surrounds.
2. The delivery system of claim 1 , wherein the device comprises a stented valve.
3. The delivery system of claim 2 , wherein the plurality of structures at the proximal end of the stented valve comprises a plurality of stent crowns.
4. The delivery system of claim 1 , wherein the removable attachment between the first and second body portions comprises a threaded connection.
5. The delivery system of claim 4 , wherein the distal end of the inner actuation member comprises an external threaded portion and is configured to removably engage with an internal threaded portion of the sleeve assembly.
6. The delivery system of claim 5 , wherein the outer tube includes an internal engagement surface for engagement with an external engagement surface of the wire assembly.
7. The delivery system of claim 6 , wherein the internal engagement surface of the outer tube is a threaded engagement surface and the external engagement surface of the wire assembly is a threaded engagement surface.
8. The delivery system of claim 1 , wherein the removable connection between the first and second body portions comprises a frictional connection.
9. The delivery system of claim 1 , wherein the second body portion comprises a cartridge.
10. The delivery system of claim 1 , wherein at least one of the plurality of wires comprises a coiled distal end that is removeably attachable to one of the structures of the stented device.
11. The delivery system of claim 1 , wherein the outer tube includes an internal engagement surface for engagement with an external engagement surface of the wire assembly.
12. The delivery system of claim 11 , wherein the internal engagement surface of the outer tube is a threaded engagement surface and the external engagement surface of the wire assembly is a threaded engagement surface.
13. The delivery system of claim 1 , further comprising a sheath surrounding the outer tube and the stented device for maintaining the stented device in a radially compressed configuration.