IMPLANTABLE DEVICE FOR IMPROVING OR RECTIFYING A HEART VALVE INSUFFICIENCY

• US 20150127097A1
• Filed: 05/22/2013
• Published: 05/07/2015
• Est. Priority Date: 06/01/2012
• Status: Abandoned Application

• Current Assignee: University of Duisburg-Essen
• Original Assignee: Universitat Duisburg-Essen
• Inventors: Erbel, Raimund, Neumann, Till
• Application Number:
  US14/397,465
• Publication Number:
  US 20150127097A1
• Time in Patent Office: Days
• US Class Current: 623/2.17
• CPC Class Codes: A61F 2/2409 Support rings therefor, e.g. for connecting valves to tissue annuloplasty rings A61F2/2442
• 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 2/246 Devices for obstructing a leak through a native valve in a closed condition
• CPC Class Codes: A61F 2/2487 Devices within the heart chamber, e.g. splints
• CPC Class Codes: A61F 2210/0061 swellable
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0041 J-shaped
• CPC Class Codes: A61F 2230/006 Y-shaped
• CPC Class Codes: A61F 2240/002 Designing or making customized prostheses
• CPC Class Codes: A61F 2250/0036 differing in thickness

Abstract

The invention relates to an implantable device for improving or rectifying a heart valve insufficiency, comprising a closure element (1) which can be positioned in the passage area of a heart valve, in particular in the area between an atrium (2) and a ventricle (3) of the heart, and which has an upper, upstream end (1a) and a lower, downstream end (1b), wherein at least one contact strip (4) is arranged at at least one of the ends (1a, 1b) of the closure element (1), which extends away from the closure element (1) and is led back to the closure element (1) in at least one loop, wherein at least a part of the extent of the strip can be placed against the inner wall of the heart.

Claims

1. An implant for improving or rectifying a heart-valve insufficiency comprising:

a closure body that is positionable in a passage of a heart valve between an atrium and a ventricle of the heart and that has an upper, upstream end and a lower, downstream end;

at least one contact strip on at least one of the ends of the closure body, extending away from the closure body, guided back in at least one loop to the closure body, and engaged against the inner heart wall along at least a part of its extension.

2. The implant according to claim 1, wherein the contact strip is formed from a spring-elastic shape-memory alloy.

3. The implant according to claim 1, wherein the contact strip is formed by a wire wound in a helix that forms a passage, or by a wire braid that forms a passage extending longitudinally of the contact strip with a further wire of a shape-memory alloy extending inside the longitudinal passage.

4. The implant according to one of the preceding claims, claim 1, wherein the contact strip is formed with at least one bend or buckle whose tip points toward the closure body in the loop of the contact strip, in particular in the loop that in the ventricle.

5. The implant according to claim 1, wherein the closure body is of sickle-shaped cross section having tips and the contact strip is fastened in or on lateral regions of the closure body extending between the ends and extending perpendicular to the flow direction in the sickle tips.

6. The implant according to claim 1, wherein the contact strip is closed and formed with a loop over the upper end and a loop under the lower end of the closure body are formed by a single contact strip, the two loops merging into one another through the lateral regions or through an interior of the closure element.

7. The implant according to claim 6, wherein one of the loops is in the atrium and is formed as convex to the heart wall and the other of the loops is in the ventricle and forms a tip that is distal to the closure body, is oriented toward the heart wall, and that can is anchored in the heart muscle.

8. The implant according to claim 1, wherein the closure body can be unfolded from a folded or collapsed state by an internal application of force by a fluid that can be pumped in, a swelling medium, or by at least one contact strip that is guided through the closure body.

9. The implant according claim 1, wherein at least one contact strip branches along its extension path into at least two contact strip sections at a location of maximum spacing from the branching location from the closure body.

10. The implant according to claim 1, wherein barbs or nubs are arranged on the outer sides of the at least one contact strip.

11. The implant according to claim 1, wherein the contact strip has, in regions of its extension in which it can be applied to the inner heart wall, a cross section that is flattened and widened relative to other regions.

12. The implant according to claim 1, wherein the closure body has a cross-sectional constriction between the upper and lower ends.

13. The implant according to claim 1, wherein the closure body is adapted at least in the plane of the heart valve, to a specific shape that was previously determined by measurement technology of a gap between the cusps of a closed heart valve of a patient.

14. The implant according to claim 1, wherein the closure body is formed at least on its surface from a swelling biocompatible material or the closure body has a hydrophilic surface or a coating/texture of the surface that promotes endothelialization.

15. The implant according to claim 1, wherein the implant is so constructed and designed that can be introduced into a heart in collapsed form through a catheter or a port.

16. The implant according to claim 1, further comprising:

a movable valve element on each side of the closure body.