Low profile valve locking mechanism and commissure assembly

• US 10,426,617 B2
• Filed: 03/02/2016
• Issued: 10/01/2019
• Est. Priority Date: 03/06/2015
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Backus, Andrew J. H., Ino, Takashi H., Crisostomo, Crissly V., Calomeni, Michael P., Pham, Anh Thu
• Primary Examiner(s): Ou, Jing Rui
• Application Number:
  US15/058,841
• Publication Number:
  US 20160256271A1
• Time in Patent Office: 1,308 Days
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2/243 Deployment by mechanical expansion
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• 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

Abstract

A replacement heart valve locking mechanism may include a buckle member fixedly attached to a tubular anchor member defining a central longitudinal axis, a post member axially translatable relative to the buckle member, and an actuator member releasably connected to the post member at an attachment point. The post member may include a latch portion configured to engage a catch formed in the buckle member such that movement of the post member distally relative to the buckle member is prevented. The attachment point may be disposed proximal of the latch portion. Circumferential translation of the latch portion about the central longitudinal axis may disengage the latch portion from the catch.

Claims

1. A replacement heart valve locking mechanism, comprising:

a buckle member fixedly attached to a tubular anchor member;

a post member axially translatable relative to the buckle member; and

an actuator member releasably connected to the post member at an attachment point;

wherein the post member includes a latch portion configured to engage a catch formed in the buckle member such that movement of the post member distally relative to the buckle member is prevented;

wherein the attachment point is disposed proximal of the latch portion;

wherein the post member includes a cantilevered leg extending proximally from a distal end of the post member and radially inward from the tubular anchor member;

wherein distal movement of the actuator member relative to the post member is configured to disengage the latch portion from the catch.

2. The replacement heart valve locking mechanism of claim 1, further including a pin member releasably engaged with and extending through the actuator member and the post member at the attachment point.

3. The replacement heart valve locking mechanism of claim 2, wherein the pin member includes a straightened distal section and a curled distal tip portion distal of the distal section.

4. The replacement heart valve locking mechanism of claim 3, wherein the pin member curves in a single direction from the distal section through the distal tip portion.

5. The replacement heart valve locking mechanism of claim 1, wherein proximal axial translation of the post member moves the attachment point from a first position distal of the buckle member to a second position proximal of a distal end of the buckle member.

6. The replacement heart valve locking mechanism of claim 1, wherein the buckle member is substantially rigid.

7. The replacement heart valve locking mechanism of claim 6, wherein the latch portion is moveable relative to a body portion of the post member.

8. The replacement heart valve locking mechanism of claim 1, wherein at least a portion of the post member is flexible.

9. A replacement heart valve locking mechanism, comprising:

a buckle member fixedly attached to a tubular anchor member, the anchor member defining a central longitudinal axis;

a post member axially translatable relative to and within the buckle member; and

an actuator member releasably connected to the post member at an attachment point;

wherein the post member includes a body portion and a latch portion movable relative to the body portion, the latch portion being configured to engage a catch formed in the buckle member such that movement of the post member distally relative to the buckle member is prevented;

wherein distal movement of the actuator member relative to the post member is configured to circumferentially translate the latch portion about the central longitudinal axis within the buckle member;

wherein circumferential translation of the latch portion about the central longitudinal axis within the buckle member disengages the latch portion from the catch.

10. The replacement heart valve locking mechanism of claim 9, wherein the buckle member includes two axially-extending side walls extending away from the anchor member, a back wall extending between the two side walls and defining a channel extending axially through the buckle member, and one or more apertures disposed within the back wall between the two side walls;

wherein a fastening element passes through the one or more apertures and secures the buckle member to the anchor member.

11. The replacement heart valve locking mechanism of claim 10, wherein the buckle member includes a slot passing axially therethrough along one of the two side walls.

12. The replacement heart valve locking mechanism of claim 11, wherein the slot is at least partially coincidental with the channel.

13. The replacement heart valve locking mechanism of claim 10, wherein the catch is formed within at least one of the two side walls.

14. The replacement heart valve locking mechanism of claim 10, wherein the back wall is disposed radially distant from the central longitudinal axis relative to the two side walls, the back wall including a recessed portion in communication with the one or more apertures and a distal end of the buckle member.

15. The replacement heart valve locking mechanism of claim 14, wherein the fastening element extends away from the buckle member through the recessed portion when the post member is disposed within the channel.

16. The replacement heart valve locking mechanism of claim 9, wherein the post member includes a cantilevered leg extending proximally from a distal end of the post member.

17. The replacement heart valve locking mechanism of claim 9, wherein the actuator member includes a flattened attachment portion fixedly attached to a D-shaped elongated rod.

18. The replacement heart valve locking mechanism of claim 17, wherein at least a portion of the elongated rod extends distally of the attachment portion.

19. The replacement heart valve locking mechanism of claim 18, wherein the portion of the elongated rod extending distally of the attachment portion is configured to effect circumferential translation of the latch portion about the central longitudinal axis to disengage the latch portion from the catch when the actuator member is advanced distally.