MEDICAL IMPLANT AND METHOD FOR PRODUCING MEDICAL IMPLANT

• US 20120071964A1
• Filed: 10/27/2009
• Published: 03/22/2012
• Est. Priority Date: 10/29/2008
• Status: Active Grant

• Current Assignee: Acandis GmbH
• Original Assignee: Acandis GmbH & Co. KG
• Inventors: Cattaneo, Giorgio, Baidinger, Otto
• Granted Patent: US 8,978,533 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: D04C 1/06 Braid or lace serving particular purposes
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

The invention relates to a medical implant, particularly a stent, having a wall (11) braided out of multiple wires (10a, 10b) said wall extending along a longitudinal axis L and curving around the longitudinal axis L at least in sections, wherein in each case at least two wire ends (12) of the wires (10a, 10b, 10c, 10d) are connected to at least two first braid ends (13a, 13b) forming a first circumferential section (16a) of the wall (11) extending around the longitudinal axis L. The invention is characterised in that in each case at least two first braid ends (13a, 13b) are connected to one or more second braid ends (14a, 14b), wherein the second braid ends (14a, 14b) form a second circumferential section (16b) of the wall (11) extending around the longitudinal axis L and following the first circumferential section (16a) in sequence in the longitudinal direction or the second braid ends (14a, 14b) are arranged in the circumferential direction U of the wall (11).

Claims

1. Medical implant, particularly a stent, having a wall braided out of multiple wires extending along a longitudinal axis L and curving around the longitudinal axis L at least in sections, wherein in each case at least two wire ends of the wires are connected to at least two first braid ends forming a first circumferential section of the wall extending around the longitudinal axis L

wherein

in each case at least two first braid ends are connected to one or more second braid ends, wherein the second braid ends form a second circumferential section of the wall extending around the longitudinal axis L, extending around the longitudinal axis L and following the first circumferential section in sequence in the longitudinal direction or the second braid ends are arranged in the circumferential direction U of the wall.

2. Implant according to claim 1,

wherein

the braid ends, particularly second braid ends, forming the axial implant end, particularly the axial stent end, comprise loop-shaped ends with a first section extending in the distal direction, a curved second section and a third section extending in the proximal direction, which, distributed in the circumferential direction, substantially connect axially extending first braid ends, wherein at least two loop-shaped ends arranged immediately adjacent in the circumferential direction are connected to each other.

3. Implant according to claim 2,

wherein

the loop-shaped ends in each case comprise a group of the wire ends of the first braid end, which are connected to a group of the wire ends of a further first braid end.

4. Implant according to claim 3,

wherein

the wire ends of the first braid end are branched in the region of the second circumferential section in such a way that the groups of the wire ends form at least two loop-shaped ends arranged in opposed circumferential directions, wherein the wire ends of the one branched first braid end are in each case connected to the wire ends of a further non-branched first braid end.

5. Implant according to claim 4,

wherein

the wire ends of the non-branched first braid end and the wire ends of the loop-shaped ends connected thereto are arranged in opposition directions, particularly abutting in opposite directions.

6. Implant according to claim 3,

wherein

the wire ends of the interconnected groups are arranged in parallel in the region of the connection.

7. Implant according to claim 2,

wherein

the wire ends of the first braid end are connected to each other and/or to wire ends of at least one further first braid end mechanically, particularly by twisting and/or interlacing and/or by a connecting element and/or adhesively, particularly by welding, soldering or gluing.

8. Implant according to claim 2,

wherein

the loop-shaped ends form a plurality of planes in such a way that at least one loop-shaped end overlaps a plurality of first braid ends connected to each other by loop-shaped ends.

9. Implant according to claim 2,

wherein

the loop-shaped ends are arranged overlappingly.

10. Implant according to claim 1,

wherein

more than two circumferential sections are provided, which are arranged in sequence in the longitudinal direction and in each case are formed by interconnected further braid ends.

11. Implant according to at least one of claims 1 to 10 claim 1,

wherein

the wires, whose wire ends are connected to form in each case one braid end, and/or the braid ends, which are connected to form in each case a further braid end run in opposing directions A, A′

, B, B′

.

12. Implant according to at least one of claims 1 to 11 claim 1,

wherein

the braid ends in each case comprise a connecting section, wherein the connecting sections are arranged in opposite directions and connected to each other.

13. Implant according to claim 12,

wherein

the connecting sections are arranged with their end faces in a face-to-face arrangement and/or the connecting sections are arranged overlappingly in parallel and/or the connecting sections connected to each other under an angle α

.

14. Implant according to claim 1,

wherein

the braid ends (13a, 13b, 15a, 15b) in each case comprise a connecting section (17a, 17b), wherein the connecting sections (17a, 17b) are arranged in the same direction and are connected to each other.

15. Implant according to claim 1,

wherein

the wires, whose wire ends are connected to form in each case a first braid end, and/or the braid ends, which are connected to form in each case a further braid end, have the same angle of twist at least in the region close to the connection of the wire ends or at least in the region close to the connection of the braid ends.

16. Implant according to claim 1,

wherein

the wires in the region close to the connection of the wire ends and the first braid ends have different angles of twist and/or the braid ends provided in axially sequential circumferential sections have different angles of twist.

17. Implant according to claim 1,

wherein

two interconnected braid ends comprise at least one braid end, which, adjacent to the connecting region is curved between the two connected braid ends.

18. Implant according to claim 17,

wherein

the wires of the curved braid end are twisted or wound.

19. Implant according to claim 1,

wherein

the wires, whose wire ends are connected to form in each case a first braid end have the same direction A, B.

20. Implant according to claim 19,

wherein

at least two first braid ends with in each case equidirectional wires are arranged in opposite directions A′

, B′ and

are connected to form second braid end.

21. Implant according to claim 1,

wherein

particularly 4, particularly 6, particularly 8, particularly 12, particularly more than 12 wires are provided for each braid end.

22. Implant according to claim 1,

wherein

particularly 3, particularly 4, particularly 5, particularly 6, particularly 7, particularly 8, particularly 12, particularly 16, particularly more than 16 braid ends are provided.

23. Implant according to claim 1,

wherein

the angle of twist in the region of the braid ends is greater than 10°

, particularly greater than 20°

, particularly greater than 30°

, particularly greater than 40°

, particularly greater than 50°

, particularly greater than 60°

, particularly greater than 70°

.

24. Implant according to claim 1,

wherein

at least two braid ends are connected to each other by a connecting element.

25. Implant according to claim 24,

wherein

the connecting element is elastic.

26. Implant according to claim 24,

wherein

the connecting element can be changed from an expanded state to a compressed state.

27. Implant according to claim 26,

wherein

in expanded state, the connecting element applies a force to the braid ends connected by the connecting element in such a way that the braid ends are pressed apart.

28. Implant according to claim 24,

wherein

the connecting element comprises a connecting coil, a connecting sleeve, connecting wires and the like.

29. Implant according to claim 24,

wherein

the connecting element comprises a middle section with connecting ends, wherein the connecting ends are connected to at least two braid ends.

30. Implant according to claim 29,

wherein

the middle section comprises a wire which is U-shaped in use and/or a coil which is U-shaped in use.

31. Implant according to claims 24,

wherein

the connecting element comprises a multiple connector connecting more than two braid ends.

32. Medical implant, particularly a stent, having a wall braided out of multiple wires extending along a longitudinal axis L and curving around the longitudinal axis L at least in sections, wherein at least two wire ends of the wires are connected to at least one braid end arranged on a first circumferential section of the wall extending around the longitudinal axis L

wherein

the wires, whose wire ends connected to each other to form the same braid end, have the same direction of twist A, A′

, B, B′ and

the braid end is arranged in the circumferential direction U of the wall.

33. Method for producing a medical implant, particularly a stent, in which a wall is braided out of multiple wires, wherein in each case two wire ends of the wires are connected to each other to form at least two braid ends.

wherein

at least two braid ends are connected to each other.

34. Method for producing a medical implant, particularly a stent, in which one wall is braided out of multiple wires, wherein in each case two wire ends of the wires are connected to each other to form at least one braid end,

wherein

the wires, whose wire ends are connected to each other to form the same braid end, have the same direction of twist A, A′

, B, B′ and

the braid end is arranged in the circumferential direction of the wall.