Mitral valve replacement toggle cell securement

Patent metadata

Field	Value
Publication number	US-10085834-B2
Application number	US-201515125356-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 18, 2014
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A collapsible and expandable stent ( 320 ) extends in an axial direction from a proximal end to a distal end. The stent may include a plurality of first cells ( 324 ), each first cell having an open space defined by a first plurality of struts ( 322 ). The stent may further include a second cell ( 330 ) nested in the open space of one of the first cells, the second cell being defined by a second plurality of struts ( 330 a - d ). The stent may additionally include first and second connecting struts ( 332, 334 ) connecting the second cell to the one first cell. The second cell may be configured to pivot about the first and second connecting struts with respect to the one first cell. The pivoting may create a clearance space between the second cell and an outer perimeter of the stent in which portions of a native valve structure may be clamped.

First claim

The invention claimed is:

1. A collapsible and expandable stent extending in an axial direction from an outflow end to an inflow end, comprising:
a plurality of first cells, each first cell having an open space defined by a first plurality of struts;
a second cell nested in the open space of one of the first cells, the second cell being defined by a second plurality of struts; and
first and second connecting struts connecting the second cell to the one of the first cells;
wherein the second cell is configured to pivot about the first and second connecting struts with respect to the one of the first cells,
wherein the one of the first cells defines a surface, and the second cell includes first and second struts meeting at a first apex that does not lie within the surface when no external force is applied to the stent, and the second cell includes third and fourth struts meeting at a second apex that does lie within the surface when no external force is applied to the stent, the first and second apices each configured to pivot into and out of the surface.

2. The stent of claim 1 , further comprising a pulling member operably connected to at least one of the second plurality of struts.

3. The stent of claim 2 , further comprising an aperture in the at least one of the second plurality of struts, the pulling member being threaded through the aperture.

4. The stent of claim 1 , wherein the first and second struts are each positioned closer to the outflow end of the stent than are the third and fourth struts.

5. The stent of claim 4 , wherein the first strut is connected to the third strut at a first connection point and the second strut is connected to the fourth strut at a second connection point, the first and second connection points being offset in the axial direction from the first and second connecting struts.

6. The stent of claim 5 , wherein the first and second struts each has a length in the axial direction which is smaller than a length in the axial direction of each of the third and fourth struts.

7. The stent of claim 1 , wherein the first strut of the second cell is connected to the first cell via the first connecting strut, the second strut of the second cell is connected to the first strut and is connected to the first cell via the second connecting strut, the third strut of the second cell is connected to the first strut, and the fourth strut of the second cell is connected to the third strut and to the second strut.

8. The stent of claim 1 , further comprising:
a band applied about a circumference of the stent and movable relative to the stent in the axial direction; and
a pull wire operably connected to the band.

9. The stent of claim 8 , wherein the pull wire is threadedly connected to the band.

10. The stent of claim 8 , wherein the pull wire is operable to transmit force to the band to move the band relative to the stent in a proximal axial direction and in a distal axial direction.

11. The stent of claim 1 , further comprising a collapsible and expandable valve assembly disposed within the stent and having a plurality of leaflets.

Assignees

• St Jude Medical Cardiology Div Inc
• St Jude Medical Cardiology Divsion Inc

Inventors

• Benson Thomas Mark
• Eidenschink Tracee

Classifications

• A61F2220/0008

  Fixation appliances for connecting prostheses to the body · CPC title

• A61F2/2427

  Devices for manipulating or deploying heart valves during implantation · CPC title

• A61F2/24 Primary

  Heart valves {; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body} · CPC title

• A61F2/2418 Primary

  Scaffolds therefor, e.g. support stents · CPC title