Extendible stent apparatus

• US 20040015227A1
• Filed: 05/19/2003
• Published: 01/22/2004
• Est. Priority Date: 11/04/1996
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Davidson, Charles, Vardi, Gil
• Granted Patent: US 7,766,955 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/064 with special features to facilitate anastomotic coupling anastomosis of natural blood vessels A61B17/11
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2002/91583 by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2250/006 : modular
• CPC Class Codes: A61F 2250/0098 : radio-opaque, e.g. radio-opaque markers

Abstract

The present invention concerns novel stent apparatuses for use in treating lesions at or near the bifurcation point in bifurcated cardiac, coronary, renal, peripheral vascular, gastrointestinal, pulmonary, urinary and neurovascular vessels and brain.vessels. More particularly, the invention concerns a stent apparatus with at least one side opening which may further comprise an extendable stent portion laterally extending from the side opening and at least partly in registry with the wall of the side opening. Devices constructed in accordance with the invention include, singularly or in combination, a main expandable stent comprising at least one substantially circular side opening located between its proximal and distal end openings, which side opening may further comprise an expandable portion extending radially outward from the edges of the side opening; and a branch stent comprising proximal and distal end openings and which may further comprise a contacting portion at its proximal end, and which may optionally be constructed to form either a perpendicular branch or a non-perpendicular branch when inserted through a side opening of the main stent. The stents of the invention are marked with, or at least partially constructed of, a material which is imageable during intraluminal catheterization techniques, most preferably but not limited to ultrasound and x-ray.

Claims

1. A generally cylindrical reinforcing stent apparatus for placement in at least one bifurcated cardiac, coronary, renal, peripheral vascular, gastrointestinal, pulmonary, urinary or neurovascular system vessel or a vessel in the brain, comprising a main stent having sides extending between first and second opposing ends and at least one opening being defined in a stent side.

2. The stent apparatus of claim 1 wherein the stent comprises a self-expanding material.

3. The stent apparatus of claim 1 wherein the stent comprises a balloon-expandable material.

4. The stent apparatus of claim 1 wherein at least a portion of the stent is constructed of a material which is imageable.

5. The stent apparatus of claim 1 wherein at least one opening further comprises an expandable portion which expands radially from the perimeter of the opening.

6. The stent apparatus of claim 1 wherein the length of the stent in its compressed state is smaller than 4 centimeters and the diameter of the stent in its compressed state is smaller than 2 centimeters.

7. The stent apparatus of claim 5 wherein the stent comprises an expandable material.

8. The stent apparatus of claim 5 wherein the length of the stent in its compressed state is smaller than 4 centimeters and the diameter of the stent in its compressed state is smaller than 2 centimeters.

9. The stent apparatus of claim 5 wherein at least a portion of the stent is constructed of a material which is imageable by x-ray or ultrasound.

10. The stent apparatus of claim 1 further comprising a second stent disposed at least partly within the main stent and having sides extending between proximal and distal opposing ends, wherein the second sent is a branch stent and the second branch stent being moveable and adapted to be extended in an angularly flexible fashion through at least one of said side openings of said main stent and at least partially contacting the perimeter of said side opening.

11. The stent apparatus of claim 10 wherein the second stent additionally comprises a contacting portion located at its proximal end, which contacting portion at least partially contacts the edges of said main stent side opening.

12. The stent apparatus of claim 10 wherein the stents comprise an expandable material.

13. The stent apparatus of claim 10 wherein the stents comprise a balloon-expandable material.

14. The stent apparatus of claim 10 wherein at least a portion of the stents are constructed of a material which is imageable.

15. The stent apparatus of claim 10 wherein the length of the stent apparatus in its compressed state is smaller than 4 centimeters and the diameter of the stent apparatus in its compressed state is smaller than 2 centimeters.

16. A bifurcating double-stent reinforcing apparatus for intraluminal placement by catheter within a bifurcated vessel comprising first and second generally cylindrical stents, wherein the second stent is a branch stent and is located at least partly within the first stent, and having sides in each stent extending between first and second opposing ends, and at least one opening being defined in a side of the first stent and the second branch stent being moveable and adapted to be extended through at least one of said side openings of said first stent and at least partially contacting the perimeter of said side opening and extending into a vessel branch, said first and second stents each being constructed from a material which allows said stents to expand to conform to the shape of the subject vessel.

17. The stent apparatus of claim 16 wherein the second branch stent additionally comprises a proximal end and an opposing distal end, wherein the proximal end additionally comprises a contacting portion, which contacting portion is at least partially in contact with the perimeter of said first stent side opening.

18. The stent apparatus of claim 16 wherein the first stent further comprises an expandable portion which expands in a variably angled lateral manner from the perimeter of the first stent side opening.

19. The stent apparatus of claim 16 wherein the first and second stents comprise a self-expanding material.

20. The stent apparatus of claim 16 wherein the stents comprise a balloon-expandable material.

21. The stent apparatus of claim 16 wherein at least a portion of the stents are constructed of a material which is imageable.

22. The stent apparatus of claim 16 wherein at least a portion of the stents are marked with a material which is imageable.

23. The stent apparatus of claim 16 wherein the length of the stent appartus in its compressed state is smaller than 4 centimeters and the diameter of the stent apparatus in its compressed state is smaller than 2 centimeters.

24. A generally cylindrical bifurcated reinforcing stent apparatus for placement in at least one bifurcated cardiac, coronary, renal, peripheral vascular, gastrointestinal, pulmonary, urinary or neurovascular system vessel or a vessel in the brain, comprising a radially expandable stent with sides extending between first and second opposing ends and at least one opening being defined in at least one stent side, and wherein at least one side opening further comprises an expandable portion which expands radially from the edges of an opening, and further wherein at least a portion of the stent is constructed of a material which is imageable and wherein the length of the stent in its compressed state is smaller than 4 centimeters and the diameter of the stent in its compressed state is smaller than 2 centimeters.

25. A bifurcating double-stent reinforcing apparatus for intraluminal placement by catheter within a bifurcated cardiac, coronary, renal, peripheral vascular, gastrointestinal, pulmonary, urinary or neurovascular system vessel or a vessel in the brain comprising a first stent with sides extending between first and second opposing ends and at least one opening being defined in a stent side and a second generally cylindrical stent, wherein the first stent may optionally further comprise an expandable portion which expands radially from the edge of one opening of said first stent side, and wherein the second stent is a branch stent and comprises a proximal end and an opposing distal end, wherein the proximal end may optionally comprise a contacting portion which at least partly contacts the edges of said first stent side opening and which is located at least partly within the first stent, and the second stent being moveable and adapted to be extended through at least one of said side openings of said first stent in an angularly flexible fashion, said first and second stents each being constructed from a material which allows said stents to expand to conform to the shape of the subject vessel, wherein at least a portion of the stent apparatus is constructed of a material which is imageable and wherein the length of the stent apparatus in its compressed state is smaller than 4 centimeters and the diameter of the stent in its compressed state is smaller than 2 centimeters.