Catheter assembly with prosthesis crimping and prosthesis retaining accessories

• US 9,387,077 B2
• Filed: 05/24/2011
• Issued: 07/12/2016
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: Medtronic Vascular Galway Limited (Medtronic Plc)
• Original Assignee: Medtronic Vascular Galway Limited (Medtronic Plc)
• Inventors: Miller, Noam
• Primary Examiner(s): Weisberg, Amy R
• Application Number:
  US13/114,826
• Publication Number:
  US 20110295216A1
• Time in Patent Office: 1,876 Days
• Field of Search: 623 111- 112, 623/1.23, 623/2.11, 606/108, 606/200
• US Class Current: 1/1
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A prosthesis retaining assembly for securing an implantable prosthesis to a catheter assembly can include a first member including a prosthesis retaining slot configured to retain a portion of the prosthesis. The retaining slot can have a first portion with a first width and a second portion with a second width. The first portion can be distal to the second portion. The second width can be larger than the first width, and the retaining slot can have an opening at a first surface of the first member. The prosthesis retaining assembly can also include a second member configured to be move relative to the first member. The second member can be configured to move to a position that obstructs a portion of the opening of the retaining slot.

Claims

1. A prosthesis retaining assembly for securing an implantable prosthesis to a catheter assembly, the prosthesis retaining assembly comprising:

a first member including a central longitudinal axis, a hollow chamber and a prosthesis retaining slot configured to retain a portion of the prosthesis, the retaining slot being configured to retain a portion of the prosthesis such that when the portion of the prosthesis is retained within the retaining slot longitudinal movement of the prosthesis relative to the first member is prevented, the retaining slot having a first opening at an interior surface of the first member defining the hollow chamber; and

a second member positioned within the hollow chamber of the first member and comprising an enlarged portion, the second member being movable relative to the first member between

a first position at which the enlarged portion is positioned adjacent to and obstructs a portion of the first opening of the retaining slot preventing the portion of the prosthesis retained within the retaining slot from exiting the first opening of the retaining slot in a radially inward direction towards the central longitudinal axis and

a second position at which the enlarged portion is moved relative to the retaining slot to create a gap between the second member and the first opening of the retaining slot such that the portion of the prosthesis can pass through the first opening of the retaining slot in a radially outward direction away from the central longitudinal axis.

2. The prosthesis retaining assembly of claim 1, wherein the first member further comprises a second prosthesis retaining slot and at least two walls extending from an inner portion of a top surface of the first member, spaces between the walls each defining a channel that opens to one of the prosthesis retaining slots, the at least two walls defining a shoulder on an outer portion of the top surface, the walls being configured to prevent a second portion of the prosthesis adjacent the first portion of the prosthesis from moving inward.

3. The prosthesis retaining assembly of claim 1, wherein the second member includes a central lumen.

4. The prosthesis retaining assembly of claim 1, further comprising a biasing member coupled to the second member, wherein the biasing member applies a biasing force to the second member.

5. The prosthesis retaining assembly of claim 4, wherein the biasing member is configured to move the second member to the first position that obstructs the portion of the first opening of the retaining slot.

6. The prosthesis retaining assembly of claim 4, wherein the biasing member is configured to rotationally bias the enlarged portion to the first position that obstructs the portion of the first opening of the retaining slot.

7. The prosthesis retaining assembly of claim 4, wherein the biasing member comprises a coil spring or a resilient disk.

8. The prosthesis retaining assembly of claim 1, further comprising a third member configured to be moved relative to the first member,

wherein the retaining slot has a second opening at an exterior surface of the first member, and

wherein the third member is configured to move to a position that obstructs a portion of the second opening of the retaining slot.

9. The prosthesis retaining assembly of claim 8, wherein the third member is an outer tube surrounding the first member.

10. The prosthesis retaining assembly of claim 1, further comprising second and third prosthesis retaining slots each configured to retain a respective portion of a prosthesis.

11. A method of using a catheter assembly comprising a valve retainer coupled to a distal end of the catheter assembly to implant a prosthesis, the valve retainer comprising a first member defining a retaining slot having a first opening at an interior surface of the first member that defines a hollow chamber, and comprising a second member positioned within the hollow chamber and having an enlarged portion, the method comprising:

moving the second member relative to the first member to a first position that creates a gap between the enlarged portion of the second member and the first opening of the retaining slot;

inserting a fixation portion of the prosthesis in the gap and into the retaining slot of the first member; and

moving the second member relative to the first member to a second position such that the enlarged portion of the second member is adjacent to and obstructs a portion of the first opening at the interior surface to secure the prosthesis to the valve retainer.

12. The method of claim 11, wherein moving the second member to the position that obstructs the portion of the first opening comprises biasing the second member with a biasing member.

13. The method of claim 12, wherein biasing the second member with the biasing member comprises applying a rotational bias.

14. The method of claim 12, wherein biasing the second member with the biasing member comprises applying an axial bias.

15. The method of claim 11 further comprising moving a third member to a position that obstructs a second opening at an exterior surface of the first member.

16. The method of claim 15, wherein the third member is an outer tube that surrounds the first member.

17. The method of claim 16 further comprising advancing the outer tube over the prosthesis.

18. The method of claim 15 further comprising moving the third member to a second position that does not obstruct the second opening at the second surface of the first member to release the prosthesis from the catheter assembly.

19. A prosthesis retaining assembly for securing an implantable prosthesis to a catheter assembly, the prosthesis retaining assembly comprising:

a valve retainer comprising;

a central lumen;

a top surface forming prosthesis retaining slots configured to retain respective portions of a prosthesis;

a bottom surface; and

a plurality of walls extending from the top surface of the valve retainer such that spaces between the walls define channels that are open to the prosthesis retaining slots and open to the central lumen, the plurality of walls defining a shoulder on an outer portion of the top surface and being configured to abut an inner surface of the prosthesis and prevent the portions of the prosthesis retained within the retaining slots from exiting the retaining slots into the central lumen; and

an outer tube surrounding the valve retainer and slidable relative to the valve retainer.

20. The prosthesis retaining assembly of claim 19, wherein the valve retainer comprises an exterior surface and an interior surface, and wherein the prosthesis retaining slots have an exterior opening opened to the exterior surface of the valve retainer and an interior opening opened to the interior surface of the valve retainer.