Aortic bioprosthesis and systems for delivery thereof

Patent metadata

Field	Value
Publication number	US-10376359-B2
Application number	US-201013505195-A
Country	US
Kind code	B2
Filing date	Sep 10, 2010
Priority date	Nov 2, 2009
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

Embodiments of the present disclosure are directed to stents, valved-stents, and associated methods and systems for their delivery via minimally-invasive surgery.

First claim

The invention claimed is:

1. A replacement valve for use within a human body, the replacement valve comprising:
a valve component; and
a stent component configured to house at least a portion of the valve component, wherein the stent component is configured to shift between a collapsed configuration and an expanded configuration, the stent component comprising:
a central, longitudinal stent axis;
an inflow end and an outflow end;
a lower anchoring crown comprising an at least partly conical body, wherein the lower anchoring crown defines the inflow end of the stent component;
an upper anchoring crown in communication with the lower anchoring crown and comprising an at least partly conical body,
wherein:
the at least partly conical body of the lower anchoring crown slopes outwardly in a direction of the inflow end,
the at least partly conical body of the upper anchoring crown slopes outwardly in a direction of the outflow end and thereafter extends to a free end of the upper anchoring crown;

and
an outflow stent section in communication with the upper anchoring crown and comprising:
at least a partly conical body; and
a plurality of stabilization arches configured to bear against an ascending aorta and align the stent-component with respect to the ascending aorta,

wherein:
each stabilization arch comprises a first base portion having a first thickness, a divergent portion that diverges away from the stent axis in a direction towards the outflow end in the expanded configuration, an arch apex inclined at an angle α 5 measured from the divergent portion in a direction towards the stent axis in the expanded configuration and having a second thickness, and a second base portion having a third thickness,
wherein the first thickness and the third thickness are equal and the second thickness is greater than the first thickness and is greater than the third thickness, and
wherein each first base portion of one stabilization arch is joined to the second base portion of an adjacent stabilization arch.

2. The replacement valve of claim 1 , wherein the stent component further comprises a commissural post section in communication with the upper anchoring crown, and the plurality of stabilization arches is in communication with the commissural post section.

3. The replacement valve of claim 1 , wherein the plurality of stabilization arches is configured to prevent tilting of the stent component and the valve component when implanted.

4. The replacement valve of claim 1 , wherein at least one stabilization arch of the plurality of stabilization arches comprises an asymmetric feature.

5. The replacement valve of claim 1 , wherein:
the stent component includes a lattice structure of interconnected open cells including peripheral cells defining an end of the stent component,
a first plurality of the peripheral cells being axially extended compared to a second plurality of the peripheral cells, to define a plurality of attachment elements configured for removable attachment to a delivery device, and
each attachment element including an open portion defined by an extension of the respective peripheral cell.

6. The replacement valve of claim 5 , wherein: the lower anchoring crown further comprises at least three cells which are axially elongated to form openings configured to enlarge when the stent component expands, and the lengths of the axially elongated cells are between about 2 and about 3 mm.

7. The replacement valve according to claim 1 , wherein:
the stent component further comprises at least one attachment element, and
the at least one attachment element has a form of an opening which is able to enlarge when the stent component expands.

8. The replacement valve of claim 1 , wherein: the upper anchoring crown slopes outwardly from an inner diameter D 2 to an outer diameter D 1 in the direction of the outflow end, an axial length (L 4 ) of the upper crown in an expanded configuration is between about 3 and about 4 mm, the outward slope of the upper anchoring crown is defined by an angle al, and al is between from about 40 degrees and about 50 degrees.

9. The replacement valve of claim 1 , wherein the upper and/or lower anchoring crown includes a substantially cylindrical section between the upper partly conical body and the lower partly conical body.

10. The replacement valve of claim 9 , wherein:
the substantially cylindrical section has an axial length of between about 4 mm and about 6 mm, and/or
the axial length of the substantially cylindrical section is at least 50% of the axial length of at least one of the lower or upper anchoring crown.

11. A system for replacing a valve within a human body, the system comprising:
a delivery device comprising:
an inner member comprising a guide wire lumen and a stent holder, and
an outer member comprising a sheath; and

a replacement valve for use within a human body, the replacement valve comprising:
a valve component, and
a stent component configured to house at least a portion of the valve, wherein the stent component is configured to shift between a collapsed configuration and an expanded configuration, the stent component comprising:
a central, longitudinal stent axis;
an inflow end and an outflow end;
a lower anchoring crown defining an at least partly conical body, wherein the lower anchoring crown defines the inflow end of the stent component;
an upper anchoring crown in communication with the lower anchoring crown and defining an at least partly conical body, wherein:
the at least partly conical body of the lower anchoring crown slopes outwardly in a direction of the inflow end, and
the at least partly conical body of the upper anchoring crown slopes outwardly in a direction of the outflow end; and

an outflow stent section defining an at least partly conical body and comprising a commissural post section and a stabilization arch section,
wherein:
the commissural post section is in communication with the upper anchoring crown;
the stabilization arch section comprises a plurality of stabilization arches in communication with the commissural post section and defines an at least partly conical body,
each stabilization arch comprises a divergent portion that diverges away from the stent axis in a direction towards the outflow end in the expanded configuration and an arch apex inclined at an angle α 5 measured from the divergent portion in a direction towards the stent axis in the expanded configuration, and
each stabilization arch includes a first base portion having a first thickness adjacent a first commissural post section and a second base portion having a second thickness adjacent to an adjacent second commissural post section,
wherein the arch apex of the stabilization arch has a third thickness which is greater than the first thickness and is greater than the second thickness, and

at least one attachment element for removable attachment to the delivery device, wherein:
the at least one attachment element is located at the inflow end of the stent component,
the inflow end is defined as an end toward a left ventricle when delivered from a transapical approach,
the at least one attachment element comprising an opening configured to enlarge when the stent component expands, and
the stent holder comprises at least one groove for receiving the at least one attachment element of the stent component.

12. The system according to claim 11 , wherein at least one stabilization arch of the plurality of stabilization arches comprises an asymmetric feature.

13. The system according to claim 11 , wherein the stent holder comprises ramp surfaces to facili

Assignees

• Essinger Jacques
• Biadillah Youssef
• Delaloye Stephane
• Hefti Jean Luc
• Mantanus Luc
• Passerini Reynald
• Symetis Sa

Inventors

• Essinger Jacques
• Biadillah Youssef
• Delaloye Stephane
• Hefti Jean-Luc
• Mantanus Luc
• Passerini Reynald

Classifications

• A61F2230/0054

  V-shaped · CPC title

• A61F2/2412 Primary

  with soft flexible valve members, e.g. tissue valves shaped like natural valves · CPC title

• A61F2/2418 Primary

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

• A61F2/2436

  Deployment by retracting a sheath · CPC title

• A61F2220/0058

  soldered or brazed or welded · CPC title