Endovascular device having a stent

• US 20010027338A1
• Filed: 03/02/2001
• Published: 10/04/2001
• Est. Priority Date: 03/03/2000
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Greenberg, Roy K.
• Granted Patent: US 6,827,735 B2
• Time in Patent Office: Days
• US Class Current: 623/1.13
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/12136 Balloons
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2/88 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 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas

Abstract

A stent (10,20,30,40,50,58,60,80,90,100,150,254,256,300) having an inflatable member or a plurality of members affixed directly thereto. One type of inflatable member, or pair or plurality of members, may be affixed to the outer stent surface to expand upon inflation to seal against the vessel wall, and optionally to each other as well, and may be annular (14,18,20,42,46,82,94) or spirally (22,24,26,84) or asymmetrically (32,34,36) configured. In another embodiment a member (304), or pair of opposed members (306), can be affixed to the inner stent surface and used to occlude the lumen upon inflation. The device of the present invention can also be utilized with conventional stent grafts (152) to protect branch vessels that are involved in the aneurysm span.

Claims

1. An intravascular medical device, comprising:

a stent having a lumen therethrough and having a small dimension for placement into a delivery device for delivery to a deployment site in a vessel of a patient and being expandible thereat to an enlarged dimension, and

at least one inflatable member secured to said stent, said at least one inflatable member being sufficiently small in a deflated state to be placed into said delivery device for delivery to said deployment site,

said at least one inflatable member being disposed in a location on said stent to be inflatable to abut against a surface, upon said stent being deployed at said deployment site.

2. The device according to

claim 1

, wherein said at least one inflatable member is affixed to said stent along an outer surface thereof and inflatable to press radially outwardly against a wall of said vessel for sealing engagement therewith.

3. The device according to

claim 2

, wherein said at least one inflatable member is disposed circumferentially around said stent.

4. The device according to

claim 2

, wherein said stent includes a plurality of inflatable members attached to said stent along said outer surface thereof at respective locations.

5. The device according to

claim 4

, wherein said plurality of said inflatable members are disposed circumferentially around said stent and spaced apart axially along the length of said stent.

6. The device according to

claim 4

, wherein said plurality of inflatable members are disposed in respective spiral configurations and spaced apart from each other.

7. The device according to

claim 6

, wherein said spiral configurations are parallel.

8. The device according to

claim 6

, wherein said inflatable members are spaced sufficiently closely to press against each other upon inflation.

9. The device according to

claim 8

, wherein another medical device extends radially outwardly through said stent and between selected adjacent ones of said inflatable members such that said inflatable members press against said another medical device or against each other or both, upon inflation.

10. The device according to

claim 1

, wherein said at least one inflatable member is affixed to said stent along an inner surface thereof to expand radially inwardly upon inflation.

11. The device according to

claim 1

, wherein a plurality of said inflatable members are affixed to said stent along an inner surface thereof to expand radially inwardly upon inflation.

12. The device according to

claim 11

, wherein at least two said inflatable members are positioned to face each other within said lumen and to press against each other upon inflation to occlude said lumen.

13. The device according to

claim 1

, wherein said stent includes at least one spiral strut and said at least one inflatable member is affixed to said stent along at least one circumference of said spiral strut.

14. The device according to

claim 13

, wherein said stent includes a plurality of spiral struts with several of said spiral struts having respective said inflatable members affixed thereto.

15. The device according to

claim 1

, wherein said stent further includes graft material affixed thereto.

16. The device according to

claim 1

, wherein said stent includes a large said inflatable member affixed to said stent along an outer surface thereof to substantially fill an aneurysmal sac upon inflation.

17. The device according to

claim 15

, wherein said at least one inflatable member is affixed to said stent along an outer surface thereof and is annular to define a seal with a wall of said vessel upon inflation.

18. The device according to

claim 1

, wherein at least a second stent extends outwardly from an outer surface of said stent to an end that is within a branch vessel upon deployment, said stent includes a pair of annular ones of said inflatable members affixed to said stent along said outer surface thereof on distal and proximal sides of said second stent to seal said stent against said vessel wall distally and proximally of said branch vessel.

20. The device according to

claim 18

, wherein a third stent extends outwardly from said outer surface of said stent between said pair of annular ones of said inflatable members, to a respective end that is within another branch vessel upon deployment.

21. The device according to

claim 1

, wherein a plurality of said inflatable members are arranged in an asymmetric pattern selected to complement vasculatory anatomy and to define at least one space between said plurality of inflatable members upon their inflation to permit blood flow through said at least one space.

22. The device according to

claim 1

, wherein said at least one inflatable member includes an inflation lumen initially attached thereto and in communication with an interior thereof, for introduction of inflation medium into said inflatable member.

19. The device according to

claim 19

, wherein said second stent includes at least one inflatable member affixed thereto proximate said end of said second stent.

23. An intravascular medical device, comprising:

a stent having a lumen therethrough and having a small dimension for placement into a delivery device for delivery to a deployment site in a vessel of a patient and being expandible thereat to an enlarged dimension, and

at least one inflatable member secured to said stent and having an inflation lumen extending therefrom, said at least one inflatable member being sufficiently small in a deflated state to be placed into said delivery device for delivery to said deployment site; and

said at least one inflatable member being affixed to said stent along an outer surface thereof and is disposed circumferentially therearound, and is inflatable to press radially outwardly against a wall of said vessel in sealing engagement therewith.

24. An intravascular medical device, comprising:

a stent having a lumen therethrough and having a small dimension for placement into a delivery device for delivery to a deployment site in a vessel of a patient and being expandible thereat to an enlarged dimension, and

at least two inflatable members secured to said stent and having respective inflation lumens extending therefrom, said at least two inflatable members being sufficiently small in a deflated state to be placed into said delivery device for delivery to said deployment site; and

said at least two inflatable members being affixed to an outer surface of said stent and is disposed circumferentially therearound spaced from each other, and being inflatable to press radially outwardly against a wall of said vessel in sealing engagement therewith at spaced locations.

25. An intravascular medical device, comprising:

a stent having a lumen therethrough and having a small dimension for placement into a delivery device for delivery to a deployment site in a vessel of a patient and being expandible thereat to an enlarged dimension, and

at least one inflatable member secured to said stent and having an inflation lumen extending therefrom, said at least one inflatable member being sufficiently small in a deflated state to be placed into said delivery device for delivery to said deployment site; and

said at least one member being affixed to an inner surface of said stent to expand radially inwardly upon inflation and engage and press against either itself or another said at least one inflatable member to occlude said lumen of said stent.

26. Medical apparatus for placement in a collapsed condition in a delivery device for delivery to a deployment site in a vessel of a patient, said apparatus comprising at least one stent and at least one member, characterized in that the said one member is secured to the stent and is expandable in an outward direction to engage the vessel and to act or remain as a graft to provide a seal between the vessel and the interior of the stent.

27. An intravascular medical device, comprising:

an inflatable member having a deflated state for delivery to a deployment site in a vessel of a patient and having an inflated state upon deployment, and

a stent for delivery to a deployment site in a vessel of a patient,

said inflatable member being secured to said stent at least at said deployment site after delivery of said stent thereto and after inflation of said inflatable member thereat, to abut against a wall surface of said vessel for sealing engagement therewith, after deployment.

28. An intravascular medical device, comprising:

an inflatable member having a deflated state for delivery to a deployment site in a vessel of a patient and having an inflated state upon deployment, and

a stent for delivery to a deployment site in a vessel of a patient,

said inflatable member being within said stent and being secured thereto at least prior to delivery of said stent at said deployment site and before inflation of said inflatable member thereat, to expand said stent upon inflation of said inflatable member.

29. A method of sealing around a stent at a deployment site in a vessel of a patient, comprising the steps of:

selecting and delivering to said deployment site a stent and at least one inflatable member associated therewith; and

inflating said inflatable member to abut a wall surface of said vessel for sealing engagement therewith and defining a seal between said vessel wall surface and said stent.