Stent

• US 8,372,134 B2
• Filed: 04/27/2010
• Issued: 02/12/2013
• Est. Priority Date: 05/11/2002
• Status: Expired due to Term

• 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:
  US12/768,447
• Publication Number:
  US 20110276122A1
• Time in Patent Office: 1,022 Days
• Field of Search: 623/1.13, 623/1.22, 623/1.31
• US Class Current: 623/1.13
• 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 (10) for transluminal implantation comprises a first, second and third stent section (11, 12, 13) for splinting and/or keeping open a hollow organ which are connected to each other via elastic tubular sections (14, 15). The stent (10) 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 (FIG. 1).

Claims

1. A stent for splinting and/or keeping open a hollow organ, the stent comprising:

a tubular body comprising;

several stent sections comprising;

different cross-sections which can be expanded irrespectively of each other; and

a woven, braided tubular web and/or one or more phase-shifted helices in one or more planes;

the several stent sections comprising a first stent section, a second stent section, and a third stent section; and

at least two web-free tubular sections connecting the several stent sections to each other, wherein the at least two web-free tubular sections comprises a first elastic tubular section connecting the first stent section to the second stent section and a second elastic tubular section connecting the second stent section to the third stent section.

2. The stent of claim 1, wherein the tubular body has a diameter which can be changed through axial displacement of the ends of the body relative to each other.

3. The stent of claim 1, wherein the diameters of the stent sections are different.

4. The stent of claim 1, wherein the elastic tubular sections are produced from a tissue-compatible plastic material and/or have different diameters in the unloaded state.

5. The stent of claim 1, wherein the body comprises at least one filament in the wall in the axial direction.

6. The stent of claim 5, wherein the at least one filament in the wall in the axial direction extends at least from one end of the stent to the other end thereby interconnecting the stent sections and the tubular sections of the tubular body to one another.

7. The stent of claim 1, wherein one of the stent sections forms a proximal end region of the body and a thread is worked thereinto where a portion of a length of the thread projects past the stent.

8. The stent of claim 7, the thread facilitates removal of the stent out of a hollow organ.

9. The stent of claim 1, wherein a distal end of the body comprises a return valve.

10. The stent of claim 9, wherein the return valve is a foil valve.

11. The stent of claim 10, wherein the foil valve comprises two foil sheets configured to move between an open and a closed configuration.

12. The stent of claim 1, wherein the tubular sections comprise thin, highly flexible and tear-proof plastic material.

13. The stent of claim 12, wherein said tubular sections are made from silicon.

14. The stent of claim 1, wherein the tubular body having:

a rough outer surface contour determined by a cross-sectional shape of filaments forming the web and/or by a cross-sectional shape of the one or more phase-shifted helices; and

a smooth outer surface contour provided by the at least two web-free tubular sections.

15. The stent of claim 1, wherein a return valve extends from a distal end of the tubular body.