Transcatheter prosthetic heart valve delivery system with distal cutting assembly
The disclosure relates to transcatheter stented prosthesis delivery devices including a handle assembly connected to a shaft assembly on which a stented prosthesis is loaded and compressively retained with a plurality of elongate tension members. The delivery devices include a cutting assembly that can sever the elongate tension members after the stented prosthesis is expanded at a target site so that the delivery device can be withdrawn from the patient. Certain embodiments position the cutting assembly at least within the shaft assembly and others position the cutting assembly over the shaft assembly. Various disclosed cutting assemblies are actuated with the handle assembly or the like, which draw the tension members across the blade or vice versa.
1. A delivery device for delivering a stented prosthesis to a target site; the delivery device comprising:
at least one elongate tension member that can compressively retain the stented prosthesis to the delivery device;
a shaft assembly having a lumen; and
a cutting assembly at least partially positioned within the lumen, wherein the cutting assembly includes a blade that is configured to selectively sever the at least one elongate tension member, wherein the delivery device has a first arrangement in which the blade extends outwardly as compared to a second arrangement of the delivery device.
2. The delivery device of claim 1 , wherein the cutting assembly is configured to flex to transition the blade from the first arrangement to the second arrangement.
3. The delivery device of claim 2 , wherein the cutting assembly includes two blades.
4. The delivery device of claim 3 , wherein the two blades are opposing one another.
5. The delivery device of claim 1 , wherein the cutting assembly includes an inner tube supporting the blade.
6. The delivery device of claim 1 , wherein the blade is configured to contact the at least one elongate tension member to sever at least one of the at least one elongate tension members in the second arrangement.
7. The delivery device of claim 6 , wherein the cutting assembly includes a blade holder connected to an inner tube that supports the blade.
8. The delivery device of claim 7 , wherein the blade holder is configured to transition the delivery device from the first arrangement to the second arrangement.
9. The delivery device of claim 7 , wherein the inner tube includes a window through which a blade can protrude.
10. A delivery device for delivering a stented prosthesis to a target site; the delivery device comprising:
at least one elongate tension member that can compressively retain the stented prosthesis to the delivery device;
a shaft assembly having a lumen; and
a cutting assembly at least partially positioned within the lumen; wherein the cutting assembly includes a flexible blade,
wherein the delivery device has a first arrangement in which the blade is positioned away from the at least one elongate tension member and the blade extends outwardly as compared to a second arrangement of the delivery device, and wherein the cutting assembly is configured to flex so that the blade severs the at least one elongate tension member in the second arrangement.
11. The delivery device of claim 10 , wherein the cutting assembly includes two blades.
12. The delivery device of claim 11 , wherein the two blades are opposing one another.
13. The delivery device of claim 10 , wherein the cutting assembly includes an inner tube supporting the blade.
14. The delivery device of claim 13 , wherein the cutting assembly includes a blade holder connected to the inner tube.
15. The delivery device of claim 14 , wherein the blade holder is configured to transition the delivery device from the first arrangement to the second arrangement.
16. The delivery device of claim 14 , wherein the inner tube includes a window through which the blade can protrude.
17. The delivery device of claim 14 , wherein the inner tube can move with respect to the blade holder.
18. The delivery device of claim 17 , wherein, in the second arrangement, the blade is positioned within the blade holder.
19. The delivery device of claim 13 , wherein the at least one elongate tension member is routed through the inner tube.