Delivery systems for prosthetic heart valve
Described herein are systems and methods from delivering prosthetic devices, such as prosthetic heart valves, through the body and into the heart for implantation therein. The prosthetic devices delivered with the delivery systems disclosed herein are, for example, radially expandable from a radially compressed state mounted on the delivery system to a radially expanded state for implantation using an inflatable balloon of the delivery system. Exemplary delivery routes through the body and into the heart include transfemoral routes, transapical routes, and transaortic routes, among others.
1. A delivery device for implantation of a prosthetic device within the body, the prosthetic device being radially expandable from a radially compressed state to a radially expanded state, the delivery device comprising:
an inflatable balloon; and
a proximal stop and a distal stop configured to limit longitudinal movement of the prosthetic device relative to the balloon while the prosthetic device is mounted over the balloon in the radially compressed state between the proximal stop and the distal stop;
wherein the proximal stop and the distal stop each comprise an end portion positioned within the balloon and configured to be positioned adjacent a respective end of the prosthetic device when the prosthetic device is radially compressed between the proximal and distal stops, each of the end portions comprising at least one longitudinally extending slot that allows the end portion of the respective stop to be radially compressed to a smaller diameter.
2. The delivery device of claim 1 , wherein the at least one longitudinally extending slot in each stop end portion is configured to allow a balloon-inflation fluid to flow radially through the respective stop.
3. The delivery device of claim 2 , wherein, when the prosthetic device is mounted on the delivery device in the radially compressed state, the proximal stop and the distal stop are configured to allow a balloon-inflation fluid to flow from a proximal portion of the balloon, through the at least one slot in the proximal stop, through an intermediate portion of the balloon positioned within the prosthetic device, through the at least one slot in the distal stop, and into a distal portion of the balloon.
4. The delivery device of claim 1 , wherein a proximal end of the balloon is attached to the proximal stop and a distal end of the balloon is attached to the distal stop.
5. The delivery device of claim 1 , wherein the delivery device further comprises an outer shaft having a lumen and an inner shaft extending through the lumen of the outer shaft, wherein the proximal stop is attached to a distal end of the outer shaft and/or attached to an outer surface of the inner shaft, and wherein the distal stop is attached to an outer surface of the inner shaft.
6. The delivery device of claim 5 , wherein the proximal stop further comprises:
a proximal portion attached to the distal end of the outer shaft and to a proximal end of the balloon; and
an intermediate portion between the proximal portion and the end portion, the intermediate portion having an outer diameter that is less than an outer diameter of the proximal portion and less than the diameter of the end portion.
7. The delivery device of claim 5 , wherein the proximal stop is attached to the distal end of the outer shaft and further comprises at least one fluid passageway that allows an inflation fluid to flow through the at least one passageway and into the balloon.
8. The delivery device of claim 5 , wherein the distal stop further comprises:
a distal portion attached to a distal end of the balloon; and
an intermediate portion between the distal portion and the end portion, the intermediate portion having an outer diameter that is less than an outer diameter of the distal portion and less than the diameter of the end portion.
9. The delivery device of claim 1 , wherein the end portion of each stop decreases in diameter in a direction extending away from the prosthetic device.
10. The delivery device of claim 1 , wherein the delivery device further comprises a nosecone attached to a distal end of the distal stop.
11. The delivery device of claim 1 , wherein at least one of the stop end portions comprises at least three longitudinal slots that allow the stop end portion to be radially compressed to a smaller diameter when the prosthetic device is crimped onto the delivery device.
12. The delivery device of claim 1 , in combination with a prosthetic heart valve crimped onto the balloon between the proximal and distal stops.