Endoluminal device

• US 10,130,499 B2
• Filed: 02/26/2016
• Issued: 11/20/2018
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Walsh, Kevin, Trendel, Gary
• Primary Examiner(s): Iwamaye, Andrew
• Application Number:
  US15/055,529
• Publication Number:
  US 20160175126A1
• Time in Patent Office: 998 Days
• 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 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/885 comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/041 Bile ducts
• CPC Class Codes: A61F 2002/044 Oesophagi or esophagi or gullets
• CPC Class Codes: A61F 2002/045 Stomach, intestines
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0091 helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0029 differing in bending or flexure capacity
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: D04C 1/06 Braid or lace serving particular purposes
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

The present invention relates to an endoluminal device for implantation in a body lumen, such as a pancreatic duct. The device is provided with a distal end region having greater flexibility than that of a medial region of the device.

Claims

1. An endoluminal device comprising:

a stent having a proximal end region extending to a proximal end of the stent, a distal end region extending to a distal end of the stent, and a medial region therebetween;

wherein the stent is formed of a plurality of wires;

wherein the proximal end region is a flared outward relative to the medial region and includes a plurality of loops formed by the plurality of wires;

wherein one of the plurality of loops forms a retrieval loop from one of the plurality of wires;

wherein the medial region includes a braid pattern including the plurality of wires interwoven at a medial braid angle;

wherein the distal end region includes the plurality of wires crossing one another at a distal braid angle less than the medial braid angle;

wherein the distal end region includes a plurality of loops formed by the plurality of wires, each loop being formed by an end region of a first wire of the plurality of wires connected to an end region of a second wire of the plurality of wires at a joining region, each loop having only one joining region, each loop having straight side portions, wherein there is no contact between adjacent straight side portions of adjacent loops;

wherein the first wire extends to the distal end of the loop in the distal end region and is bent back toward the proximal end to form a distal tip of the loop in the distal end region; and

wherein the distal end region is more flexible than the medial region.

2. The endoluminal device of claim 1, wherein the medial braid angle is between 95 degrees and 115 degrees.

3. The endoluminal device of claim 1, wherein each of the plurality of loops in the distal end region has a length in an axial direction of the stent and a width in a circumferential direction of the stent, wherein the length is greater than the width.

4. The endoluminal device of claim 3, wherein the joining region of each of the plurality of loops in the distal end region is distal of the straight side portions.

5. The endoluminal device of claim 3, wherein each of the plurality of loops in the distal end region circumferentially overlaps two adjacent loops of the plurality of loops in the distal end region.

6. The endoluminal device of claim 3, wherein at least one of the first and second wires forming each of the loops in the distal end region crosses over and/or under two other loops of the plurality of loops in the distal end region.

7. The endoluminal device of claim 3, wherein each of the plurality of loops in the distal end region is interbraided with two adjacent loops of the plurality of loops in the distal end region.

8. The endoluminal device of claim 1, wherein the first wire of the plurality of wires extends in a first helical direction throughout the medial region and the second wire of the plurality of wire extends in a second helical direction throughout the medial region, the first helical direction being opposite the second helical direction.

9. The endoluminal device of claim 1, further comprising a sleeve surrounding the medial end region and the distal end region.

10. The endoluminal device of claim 1, wherein each joining region is formed by only two wires.

11. An endoluminal device comprising:

a stent having a proximal end region extending to a proximal end of the stent, a distal end region extending to a distal end of the stent, and a medial region therebetween;

wherein the stent is formed of a plurality of wires;

wherein the proximal end region is a flared outward relative to the medial region and includes a plurality of loops formed by the plurality of wires;

wherein the medial region includes the plurality of wires braided together;

wherein the distal end region includes a plurality of loops formed by the plurality of wires, each loop being formed by an end region of a first wire of the plurality of wires connected to an end region of a second wire of the plurality of wires at a joining region, each loop having straight side portions, each joining region being distal of the straight side portions;

wherein each of the plurality of loops in the distal end region circumferentially overlaps two adjacent loops of the plurality of loops in the distal end region; and

wherein there is no contact between adjacent straight side portions of adjacent loops.

12. The endoluminal device of claim 11, wherein a wire forming each of the loops in the distal end region crosses over and/or under two other loops of the plurality of loops in the distal end region.

13. The endoluminal device of claim 11, wherein each of the plurality of loops in the distal end region is interbraided with two adjacent loops of the plurality of loops in the distal end region.

14. The endoluminal device of claim 11, wherein each of the plurality of loops in the distal end region has a length in an axial direction of the stent and a width in a circumferential direction of the stent, wherein the length is greater than the width.

15. The endoluminal device of claim 11, wherein each of the plurality of loops in the distal end region includes only one joining region.

16. The endoluminal device of claim 11, wherein one of the plurality of loops in the proximal end region forms a retrieval loop from one of the plurality of wires.

17. An endoluminal device comprising:

a stent having a proximal end region extending to a proximal end of the stent, a distal end region extending to a distal end of the stent, and a medial region therebetween;

wherein the stent is formed of a plurality of wires;

wherein the medial region includes the plurality of wires braided together;

wherein the distal end region includes a plurality of loops formed by the plurality of wires, each loop being formed by an end region of a first wire of the plurality of wires connected to an end region of a second wire of the plurality of wires at a joining region, each loop having straight side portions, all joining regions in the distal end region being distal of the straight side portions;

wherein each of the plurality of loops in the distal end region circumferentially overlaps two adjacent loops of the plurality of loops in the distal end region;

wherein the first wire extends to the distal end of the loop in the distal end region and is bent back toward the proximal end to form a distal tip of the loop in the distal end region; and

wherein there is no contact between adjacent straight side portions of adjacent loops.