Systems and methods for predictable commissural alignment of a replacement heart valve
A replacement heart valve prosthesis is loaded onto a balloon mounted onto a balloon shaft of a catheter system. The balloon shaft is rotatably engaged with an actuator on the handle of the catheter system. Rotation of the actuator by a first amount in a first direction permits rotation of the heart valve prosthesis by a known amount during the procedure so that alignment of the commissures of the replacement valve with the commissures of the existing valve can be predictably achieved.
1. A transcatheter delivery system comprising:
a catheter assembly comprising:
a balloon shaft;
a balloon mounted onto the balloon shaft, the balloon having a delivery diameter, the balloon in fluid communication with a fluid source for expansion of the balloon from the delivery diameter to a deployed diameter; and
a handle with an actuator, the actuator rotatably engaged with the balloon shaft; and
a valve prosthesis loaded onto the balloon in a loaded configuration, the valve prosthesis expandable from the loaded configuration to a deployed configuration by expansion of the balloon from the delivery diameter to the deployed diameter,
wherein rotation of the actuator by an actuator rotation amount in at least a first direction predictably rotates the valve prosthesis in the first direction by a valve rotation amount that is proportional to the actuator rotation amount.
2. The transcatheter delivery system of claim 1 , wherein the balloon shaft is a braided shaft.
3. The transcatheter delivery system of claim 2 , wherein the braided shaft comprises a radiopaque marker.
4. The transcatheter delivery system of claim 2 , wherein the balloon shaft has a polymer coating.
5. The transcatheter delivery system of claim 2 , wherein the balloon shaft has an elastomeric coating.
6. The transcatheter delivery system of claim 5 , wherein the elastomeric coating comprises a thermoplastic elastomer.
7. The transcatheter delivery system of claim 1 , wherein the valve rotation amount is between about 70% and 100% of the actuator rotation amount.
8. The transcatheter delivery system of claim 1 , wherein a ratio of the actuator rotation amount to the valve rotation amount is 1:1.
9. The transcatheter delivery system of claim 1 , wherein a ratio of the actuator rotation amount to the valve rotation amount is 10:8.
10. The transcatheter delivery system of claim 1 , wherein the valve prosthesis comprises a valve construct attached to a frame.
11. The transcatheter delivery system of claim 10 , wherein the valve construct comprises a sutureless single-piece three-dimensional structure with three leaflets molded into the sutureless single-piece three-dimensional structure.
12. The transcatheter delivery system of claim 10 , wherein the frame has a radiopaque marker.
13. The transcatheter delivery system of claim 12 , wherein the radiopaque marker is positioned on a commissural post of the frame.
14. The transcatheter delivery system of claim 12 , wherein the radiopaque marker is positioned onto at least one of a node or a strut adjacent to the commissural post.
15. The transcatheter delivery system of claim 1 , wherein the handle further comprises at least one actuator stop.
16. The transcatheter delivery system of claim 1 , wherein the handle further comprises a locking member, wherein when the locking member is engaged with the actuator, the balloon shaft cannot rotate.
17. The transcatheter delivery system of claim 1 , wherein the actuator is rotatable in the first direction and in a second direction opposite the first direction.
18. A transcatheter delivery system comprising:
a catheter assembly comprising:
an inner shaft;
an outer shaft; and
a lock having a locked position and an unlocked position; and
a valve prosthesis loaded onto the inner shaft,
wherein rotation of the inner shaft by a shaft rotation amount in at least a first direction predictably rotates the valve prosthesis in the first direction by a valve rotation amount that is proportional to the shaft rotation amount; and
wherein, when the lock is in the locked position, axial movement of the inner shaft relative to the outer shaft is prevented.
19. The transcatheter delivery system of claim 18 , further comprising a handle with a locking switch that engages the lock into the locked position.
20. The transcatheter delivery system of claim 19 , wherein the locking switch disengages the lock from the locked position into the unlocked position.
21. The transcatheter delivery system of claim 18 , wherein in the locked position, the inner shaft can be rotated in the first direction.
22. The transcatheter delivery system of claim 21 , wherein in the locked position, the inner shaft can be rotated in a second direction.
23. The transcatheter delivery system of claim 21 , wherein the inner shaft is a braided shaft.
24. The transcatheter delivery system of claim 21 , wherein the valve prosthesis has at least one alignment marker.
25. The transcatheter delivery system of claim 24 , wherein the valve prosthesis has three alignment markers.
26. The transcatheter delivery system of claim 24 , wherein the at least one alignment marker comprises two overlapping serpentine struts forming a numeral 8 shape.
27. The transcatheter delivery system of claim 24 , wherein the numeral 8 shape has two openings.
28. The transcatheter delivery system of claim 21 , wherein the handle further comprises at least one actuator.
29. The transcatheter delivery system of claim 28 , wherein the handle further comprises at least one actuator stop.
30. The transcatheter delivery system of claim 18 , wherein in the unlocked position, the inner shaft can move in an axial direction relative to the outer shaft and the inner shaft can be rotated in at least the first direction.