Catheter assembly with prosthesis crimping and prosthesis retaining accessories

• US 10,278,816 B2
• Filed: 06/14/2016
• Issued: 05/07/2019
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: Roberta Delgadillo
• Original Assignee: Medtronic Vascular Galway Limited (Medtronic Plc)
• Inventors: Miller, Noam
• Primary Examiner(s): Weisberg, Amy R
• Application Number:
  US15/182,419
• Publication Number:
  US 20160361166A1
• Time in Patent Office: 1,057 Days
• Field of Search: 606108, 606200, 623 111- 135, 623 211
• 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 central lumen,

a first end surface,

a longitudinal passage radially offset from the central lumen, the longitudinal passage extending to the first end surface,

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 an inner opening intersecting with the longitudinal passage and an outer opening intersecting with an outer surface of the first member; and

a second member positioned within the longitudinal passage of the first member, the second member being movable relative to the first member between

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

a second position at which the portion of the second member is moved relative to the retaining slot such that the portion of the prosthesis can pass through the inner 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 second member is a rod.

3. The prosthesis retaining assembly of claim 2, further comprising:

a ring, a portion of the ring being disposed around a portion of the outer surface of the first member, the ring including a lip extending radially inward such that the second member is disposed between the lip of the ring and the first end surface of the first member.

4. The prosthesis retaining assembly of claim 3, wherein the longitudinal passage includes a second opening at a second end surface of the first member, wherein the second member extends through the second opening, and wherein the second end surface of the first member is disposed longitudinally between the lip of the ring and the first end surface of the first member.

5. The prosthesis retaining assembly of claim 4, wherein the portion of the second member is a first end portion of the second member, and wherein a second end portion of the second member opposite the first end portion extends out of the second opening of the longitudinal passage.

6. The prosthesis retaining assembly of claim 5, wherein the second end portion of the second member has a larger cross-sectional profile than the second opening of the longitudinal passage such that the second end portion of the second member is prevented from entering the longitudinal passage through the second opening of the longitudinal passage.

7. The prosthesis retaining assembly of claim 6, further comprising a biasing member disposed between the second end of the second member and the lip of the ring, wherein biasing member biases the second member to the first position.

8. The prosthesis retaining assembly of claim 7, wherein the biasing member is a disk, wherein the disk is compressible and resilient.

9. The prosthesis retaining assembly of claim 7, wherein the biasing member is a spring.

10. The prosthesis retaining assembly of claim 2, wherein the second member is biased to the first position.

11. The prosthesis retaining assembly of claim 10,

wherein the prosthesis retaining assembly is configured such that with the second member in the first position, the portion of prosthesis may be inserted into the longitudinal passage at the first end surface of the first member, and

wherein pressure applied by the portion of the prosthesis against the second member overcomes the bias to move the second member towards the second position until the second member does not obstruct the inner opening of the retaining slot, thereby permitting the portion of the prosthesis to expand radially outward through the inner opening of the retaining slot and into the retaining slot.

12. The prosthesis retaining assembly of claim 11, further comprising an outer tube disposed radially around the first member, wherein the outer tube includes a first position blocking the outer opening of the retaining slot, thereby preventing the portion of the prosthesis from exiting the outer opening of the retaining slot.

13. The prosthesis retaining assembly of claim 12, wherein the outer tube is configured to be moved to a second position wherein the outer tube does not block the outer opening of the retainer slot, thereby enabling the portion of the prosthesis to self-expand radially outward through the outer opening during deployment of the prosthesis.