Extendible stent apparatus

• US 20050010278A1
• Filed: 08/04/2004
• Published: 01/13/2005
• Est. Priority Date: 11/04/1996
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Advanced Stent Technologies Inc. (Boston Scientific Corporation)
• Inventors: Lin, Stuart, Vardi, Gil M., Davidson, Charles J., Elam, Eric
• Granted Patent: US 7,678,142 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2250/006 modular
• CPC Class Codes: A61F 2250/0098 : radio-opaque, e.g. radio-opaque markers

Abstract

The bifurcating double stent apparatus (10) of the present invention comprises a generally cylindrical main stent (12), a generally cylindrical branch stent (15), which are shown as fully dilated in a subject main vessel (8), and a subject branch vessel (7). The main stent (12) is deployed prior to the branch stent (15) which is then aligned with the side opening (16) of the main stent (12), and attached at that location.

Claims

1. A stent for placement in a bifurcated body lumen having a main branch and a side branch, said stent comprising:

a main tubular stent body having a first end, a second end, a lumen therethrough, and a side opening having a plurality of laterally deployable elements therein.

2. A stent as in claim 1, wherein the elements are formed as an integral part of the stent body.

3. A stent as in claim 2, wherein, prior to deployment, the laterally deployable elements are aligned in a tubular envelope defined by the tubular stent body.

4. A stent as in claim 1, wherein the main tubular stent body is deformable so that it may be expanded by a balloon catheter.

5. A stent as in claim 1, wherein the main tubular stent body is deformable so that it may be expanded by a balloon catheter.

6. A stent as in claim 1, wherein at least a portion of the main stent body is radiopaque.

7. A stent as in claim 6, wherein at least a portion of the main stent body is radiopaque.

8. A stent as in claim 1, having a radially compressed configuration, wherein the length is less than 4 cm and the diameter is less than 2 cm.

9. A stent as in claim 1, wherein the side hole comprises a continuous band.

10. A stent as in claim 9, wherein the laterally deployable elements are inwardly projecting loops of the continuous band.

11. A stent for placement in a bifurcated body lumen, said stent comprising:

a main tubular body having a first end, a second end, and a side opening between said ends, wherein a first portion of the main tubular body between the first end and the side hole opens in response to a first radially outward pressure and a second portion of the main tubular body between the side hole and the second end opens in response to a second pressure, wherein the first pressure is less than the second pressure.

12. A stent as in claim 11, wherein the first pressure is in the range from 1 atmospheres to 10 atmospheres and the second pressure is in the range from 2 atmospheres to 18 atmospheres.

13. A stent as in claim 11, wherein the first portion has a first axial spine and the second portion has a second axial spine, wherein the first axial spine opens circumferentially to a first force and the second axial spine opens circumferentially in response to a second force, wherein the first force is less than the second force.

14. A stent as in claim 11, wherein the first portion comprises serpentine rings with a first strut length and the second portion comprises serpentine rings with a second strut length, wherein the first strut length is greater than the second strut length.

15. (Canceled)

16. A method for attaching a second stent to a first stent, said method comprising:

expanding a main tubular stent body; and

laterally deflecting a plurality of elements disposed about a side opening on the main tubular stent body.

17. A method as in claim 16, further comprising placing a second stent into the side hole so that said second stent engages the laterally deflected element.

18. (Canceled)

19. (Canceled)

20. (Canceled)

21. (Canceled)