Stent

• US 10,716,659 B2
• Filed: 12/19/2017
• Issued: 07/21/2020
• Est. Priority Date: 05/11/2002
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Schlick, Tilman, Kuhnle, Markus
• Primary Examiner(s): Bui, Vy Q
• Application Number:
  US15/846,906
• Publication Number:
  US 20180104043A1
• Time in Patent Office: Days
• Field of Search: 606191, 606194, 606195, 606198, 623 111, 623 115
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/044 Oesophagi or esophagi or gullets
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/30233 Stepped cylinders, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30327 differing in diameter
• CPC Class Codes: A61F 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/0007 for adjusting length
• CPC Class Codes: A61F 2250/001 for adjusting a diameter
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stent for transluminal implantation comprises a first, second and third stent section for splinting and/or keeping open a hollow organ which are connected to each other via elastic tubular sections. The stent combines at least three different stent designs in one stent and can therefore be adjusted to the motion behavior of a hollow organ in an improved fashion.

Claims

1. A stent comprising:

a proximal woven or braided tubular stent section having a first diameter, a proximal end, a distal end, and a tubular polymeric cover extending between the proximal end and the distal end of the proximal woven or braided tubular stent section;

a first tapered polymeric stent section devoid of a woven or braided element and having a proximal end and a distal end,

wherein the proximal end of the first tapered polymeric stent section has a second diameter equal to the first diameter and the distal end of the first tapered polymeric stent section has a third diameter;

a central woven or braided tubular stent section having a fourth diameter equal to the third diameter, a proximal end, a distal end, and a tubular polymeric cover extending between the proximal end and the distal end of the central woven or braided tubular stent section;

a second tapered polymeric stent section devoid of a woven or braided element and having a proximal end and a distal end,

wherein the proximal end of the second tapered polymeric tubular stent section has a fifth diameter equal to the fourth diameter and the distal end of the second tapered polymeric tubular stent section has a sixth diameter; and

a distal woven or braided tubular stent section having a seventh diameter equal to the sixth diameter, a proximal end, a distal end, and a tubular polymeric cover extending between the proximal end and the distal end of the distal woven or braided tubular stent section,

wherein the proximal end of the first tapered polymeric stent section is joined to the distal end of the proximal woven or braided tubular stent section,

wherein the proximal end of the central woven or braided tubular stent section is joined to the distal end of the first tapered polymeric stent section,

wherein the proximal end of the second tapered polymeric stent section is joined to the distal end of the central woven or braided tubular stent section, and

wherein the proximal end of the of the distal woven or braided tubular stent section is coupled to the distal end of the second tapered polymeric stent section.

2. The stent of claim 1, wherein each of the proximal woven or braided tubular stent section, the central woven or braided tubular stent section, and the distal proximal woven or braided tubular stent section is independently moveable relative to one another between a radially collapsed configuration and a radially expanded configuration.

3. The stent of claim 2, wherein the proximal woven or braided tubular stent section has a first length in the radially collapsed configuration and a second length in the radially expanded configuration and the first length is greater than the second length.

4. The stent of claim 2, wherein the central woven or braided tubular stent section has a first length in the radially collapsed configuration and a second length in the radially expanded configuration and the first length is greater than the second length.

5. The stent of claim 2, wherein the distal woven or braided tubular stent section has a first length in the radially collapsed configuration and a second length in the radially expanded configuration and the first length is greater than the second length.

6. The stent of claim 1, wherein each of the proximal woven or braided tubular stent section, the central woven or braided tubular stent section, and the distal proximal woven or braided tubular stent section is independently moveable relative to one another between a longitudinally collapsed configuration and a longitudinally expanded configuration.

7. The stent of claim 1, wherein each of the first tapered polymeric stent section and the second tapered polymeric stent section are independently elastically elongateable.

8. The stent of claim 1, wherein each of the proximal woven or braided tubular stent section, the central woven or braided tubular stent section, and the distal woven or braided tubular stent section are automatically expanding.

9. The stent of claim 1, further comprising a valve attached to the distal end of the distal woven or braided tubular stent section and responsive to fluid flows within the stent.

10. The stent of claim 1, wherein the tubular polymeric cover of the proximal woven or braided tubular stent section, the first tapered polymeric stent section, the tubular polymeric cover of the central woven or braided tubular stent section, the second tapered polymeric stent section, and the tubular polymeric cover of the distal woven or braided tubular stent section form a continuous elastomeric covering for the stent.

11. A stent comprising:

a proximal woven or braided tubular stent section having a first diameter, a proximal end, a distal end, and a tubular polymeric cover extending between the proximal end and the distal end of the proximal woven or braided tubular stent section;

a first tapered polymeric stent section devoid of a woven or braided element and having a proximal end and a distal end,

wherein the proximal end of the first tapered polymeric stent section has a second diameter equal to the first diameter and the distal end of the first tapered polymeric stent section has a third diameter;

a central woven or braided tubular stent section having a fourth diameter equal to the third diameter, a proximal end, a distal end, and a tubular polymeric cover extending between the proximal end and the distal end of the central woven or braided tubular stent section;

a second tapered polymeric stent section devoid of a woven or braided element and having a proximal end and a distal end,

wherein the proximal end of the second tapered polymeric tubular stent section has a fifth diameter equal to the fourth diameter and the distal end of the second tapered polymeric tubular stent section has a sixth diameter; and

a distal woven or braided tubular stent section having a seventh diameter equal to the sixth diameter, a proximal end, a distal end, and a tubular polymeric cover extending between the proximal end and the distal end of the distal woven or braided tubular stent section; and

a filament adapted and configured to serve as a securing thread which ensures that the different stent sections are held together;

wherein the proximal end of the first tapered polymeric stent section is joined to the distal end of the proximal woven or braided tubular stent section,

wherein the proximal end of the central woven or braided tubular stent section is joined to the distal end of the first tapered polymeric stent section,

wherein the proximal end of the second tapered polymeric stent section is joined to the distal end of the central woven or braided tubular stent section, and

wherein the proximal end of the of the distal woven or braided tubular stent section is joined to the distal end of the second tapered polymeric stent section.

12. The stent of claim 11, wherein each of the proximal woven or braided tubular stent section, the central woven or braided tubular stent section, and the distal proximal woven or braided tubular stent section is independently moveable relative to one another between a radially collapsed configuration and a radially expanded configuration.

13. The stent of claim 12, wherein the proximal woven or braided tubular stent section has a first length in the radially collapsed configuration and a second length in the radially expanded configuration and the first length is greater than the second length.

14. The stent of claim 12, wherein the central woven or braided tubular stent section has a first length in the radially collapsed configuration and a second length in the radially expanded configuration and the first length is greater than the second length.

15. The stent of claim 12, wherein the distal woven or braided tubular stent section has a first length in the radially collapsed configuration and a second length in the radially expanded configuration and the first length is greater than the second length.

16. The stent of claim 11, wherein each of the proximal woven or braided tubular stent section, the central woven or braided tubular stent section, and the distal proximal woven or braided tubular stent section is independently moveable relative to one another between a longitudinally collapsed configuration and a longitudinally expanded configuration.

17. The stent of claim 11, wherein each of the first tapered polymeric stent section and the second tapered polymeric stent section are independently elastically elongateable.

18. The stent of claim 11, wherein each of the proximal woven or braided tubular stent section, the central woven or braided tubular stent section, and the distal woven or braided tubular stent section are automatically expanding.

19. The stent of claim 11, further comprising a valve attached to the distal end of the distal woven or braided tubular stent section and responsive to fluid flows within the stent.

20. The stent of claim 11, wherein the tubular polymeric cover of the proximal woven or braided tubular stent section, the first tapered polymeric stent section, the tubular polymeric cover of the central woven or braided tubular stent section, the second tapered polymeric stent section, and the tubular polymeric cover of the distal woven or braided tubular stent section form a continuous elastomeric covering for the stent.