Stent And Filter

• US 20160242893A1
• Filed: 02/25/2016
• Published: 08/25/2016
• Est. Priority Date: 02/25/2015
• Status: Abandoned Application

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Joshi, Kaushik, Fitz, Matthew J.
• Application Number:
  US15/053,970
• Publication Number:
  US 20160242893A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2240/00 Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof

Abstract

A stent utilizing an integral filter is described. The filter portion of the stent can be connected directly to the end of the stent or can be space apart via a plurality of struts. The filter stent can be used to catch embolic material and/or the filter portion can be filled with embolic material (e.g., embolic coils) for the purpose of occluding a vessel.

Claims

1. A stent comprising:

a stent portion composed of one or more wires braided into a cylindrical shape;

said stent portion having a proximal end and a distal end;

a filter portion connected to said distal end of said stent portion;

said filter portion being comprised of mesh forming a concave shape oriented to capture material moving downstream of said stent portion.

2. The stent of claim 1, further comprising a plurality of elongated struts, each of which connected to said filter portion and to said stent portion;

wherein said struts position said stent portion at a location spaced apart and distal to said distal end of said stent portion.

3. The stent of claim 2, wherein said stent portion comprises a plurality of loops that radially flare away from said stent portion and that are disconnected from said strut.

4. The stent of claim 1, further comprising:

a connecting element comprising a plurality of elongated leg members;

said leg members having first ends connecting to said distal end of said stent portion and second ends converging together distally of said first ends; and

,

a plurality of struts that are each connected to one of said plurality of elongated leg members and to an outer circumference of said filter portion.

5. The stent of claim 1, wherein said stent portion further comprises a plurality of loops extending from said distal end of said stent portion and that radially flare away from said stent portion;

and wherein said filter portion connects to an apex of each of said plurality of loops.

6. The stent of claim 1, wherein said stent portion further comprises a plurality of loops extending from said distal end of said stent portion and that radially flare away from said stent portion;

and further comprising a plurality of elongated struts, each of which connected to said filter portion and to an apex of each of said plurality of loops;

wherein said struts position said stent portion at a location spaced apart and distal to said distal end of said stent portion.

7. The stent of claim 1, further comprising:

a plurality of loops extending from said distal end of said stent portion and that radially flare away from said stent portion;

a connecting element comprising a plurality of elongated leg members;

said leg members having first ends connecting to an apex of each of said plurality of loops and second ends converging together distally of said first ends; and

,

a plurality of struts that are each connected to one of said plurality of elongated leg members and to an outer circumference of said filter portion.

8. The stent of claim 1, further comprising:

a plurality of loops extending from said distal end of said stent portion and that radially flare away from said stent portion;

a connecting element comprising a plurality of elongated leg members;

said leg members having first ends connecting to said distal end of said stent portion and second ends converging together distally of said first ends; and

,

a plurality of struts that are each connected to one of said plurality of elongated leg members and to an outer circumference of said filter portion.

9. The stent of claim 1, wherein said stent portion comprises an outer cylindrical layer having a first porosity and an inner cylindrical layer having a second porosity that is less than said first porosity.

10. The stent of claim 1, wherein said one or more wires of said stent portion are further braided so as to form said filter portion.

11. The stent of claim 2, wherein said one or more wires of said stent portion extend from said distal end of said stent portion so as to form said plurality of elongated struts.

12. The stent of claim 2, wherein said one or more wires of said stent portion extend from said distal end of said stent portion so as to form said plurality of elongated leg members.

13. The stent of claim 1, wherein said stent portion comprises an outer cylindrical layer woven from outer wires and having a first porosity, and an inner cylindrical layer woven from inner wires and having a second porosity that is less than said first porosity;

and wherein said filter portion is connected to and woven from said inner wires of said inner cylindrical layer.

14. The stent of claim 1, further comprising a plurality of elongated struts, each of which connected to said filter portion and to said inner cylindrical layer of said stent portion;

wherein said struts position said stent portion at a location spaced apart and distal to said distal end of said stent portion and wherein said struts are formed from said inner wires of said inner cylindrical layer.

15. The stent of claim 4, wherein said plurality of leg members are curved inwards towards a central axis of said stent.

16. A method of occluding a vessel, comprising:

deploying a stent comprising;

a stent portion composed of one or more wires braided into a cylindrical shape;

said stent portion having a proximal end and a distal end;

a filter portion connected to said distal end of said stent portion;

said filter portion being comprised of mesh forming a concave shape oriented to capture material moving downstream of said stent portion;

advancing an embolic delivery device to said stent; and

,

delivering embolic coils within said filter portion.

17. The method of claim 16, wherein said deploying said stent further comprises advancing a stent delivery device to a target location;

retracting an outer sheath of said delivery device so as to allow said stent to radially expand; and

withdrawing said stent delivery device.