Replacement heart valve implant with invertible leaflets

• US 10,709,552 B2
• Filed: 07/06/2018
• Issued: 07/14/2020
• Est. Priority Date: 05/16/2016
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Backus, Andrew J. H., Calomeni, Michael P.
• Primary Examiner(s): Stewart, Alvin J
• Application Number:
  US16/028,521
• Publication Number:
  US 20180311036A1
• Time in Patent Office: 739 Days
• CPC Class Codes: A61F 2/2403 with pivoting rigid closure members check valves with hinged closure members in general F16K15/03
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/243 Deployment by mechanical expansion
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped

Abstract

A locking mechanism for a medical implant may include a buckle member, a post member axially translatable with respect to the buckle member, the post member including a receiving portion proximate a proximal end of the post member, a distal end, a laterally-arched central body portion extending between the receiving portion and the distal end, and a cantilevered leg extending proximally from the distal end, and an actuator element including a proximal shaft portion and a distal engagement portion, the distal engagement portion being configured to releasably engage the receiving portion of the post member. The proximal shaft portion may be pivotable with respect to the distal engagement portion.

Claims

1. A locking mechanism for a medical implant, comprising:

a buckle member including a proximal end and a distal end; and

a post member axially translatable with respect to the buckle member, the post member including a receiving portion proximate a proximal end of the post member, a distal end, and a cantilevered leg extending proximally from the distal end of the post member;

wherein the post member is movable from a first orientation to a second orientation, wherein when the post member is in the first orientation, the proximal end extends distally from a central body portion of the post member and when the post member is in the second orientation, the proximal end extends proximally from the central body portion.

2. The locking mechanism of claim 1 further comprising, an actuator element including a proximal shaft portion and a distal engagement portion, the distal engagement portion being configured to releasably engage the receiving portion of the post member;

wherein the proximal shaft portion is pivotable with respect to the distal engagement portion; and

wherein the actuator element includes a hinge element disposed between the proximal shaft portion and the distal engagement portion.

3. The locking mechanism of claim 2, wherein the distal engagement portion includes a lateral protrusion proximate a distal end of the distal engagement portion.

4. The locking mechanism of claim 3, wherein the lateral protrusion is configured to engage with an aperture disposed within the receiving portion.

5. The locking mechanism of claim 2, wherein the receiving portion includes a first portion and a second portion configured to splay apart as the post member is translated proximally within the buckle member to release the distal engagement portion therefrom.

6. The locking mechanism of claim 1, wherein the post member includes at least one aperture extending therethrough proximate the distal end, the at least one aperture being configured to receive a coupling element therethrough.

7. The locking mechanism of claim 1, wherein the central body portion is a laterally-arched central body portion extending between the receiving portion and the distal end, wherein the laterally-arched central body portion includes a tooth extending laterally therefrom toward the cantilevered leg.

8. The locking mechanism of claim 7, wherein the central body portion arches laterally in a first direction relative to the proximal end and the distal end, and the tooth extends laterally in the first direction from the central body portion.

9. The locking mechanism of claim 1, wherein the cantilevered leg includes a longitudinally-oriented slot extending therethrough.

10. The locking mechanism of claim 1, wherein proximal translation of the post member within the buckle member places the post member in the second orientation such that axial movement of the post member distally relative to the buckle member is prevented.

11. The locking mechanism of claim 1, wherein the central body portion is configured to flex towards a substantially straight configuration upon proximal translation through the buckle member.

12. A locking mechanism for a medical implant, comprising:

a buckle member including a proximal end, a distal end, a back wall extending from the proximal end to the distal end, a first side wall and a second side wall; and

a post member axially translatable with respect to the buckle member, the post member including a receiving portion proximate a proximal end of the post member, and a cantilevered leg extending proximally from the distal end;

wherein the first side wall and the second side wall include a proximal upper flange and a distal upper flange, the proximal upper flange and distal upper flange define a channel;

wherein the channel is configured to cooperate with the post member.

13. The locking mechanism of claim 12, wherein the first side wall and the second side wall extend radially inward toward a central longitudinal axis away from the back wall.

14. The locking mechanism of claim 12, wherein the proximal upper flange and the distal upper flange are generally parallel to the back wall and define a proximal locking face configured to engage a latch portion extending laterally from the post member.