Extendible Stent Apparatus

• US 20110153002A1
• Filed: 02/03/2011
• Published: 06/23/2011
• Est. Priority Date: 01/14/1998
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Lin, Stuart, Williams, Eric, Vardi, Gil M., Davidson, Charles J.
• Granted Patent: US 8,241,349 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 2/856 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 2002/065 Y-shaped blood vessels
• 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 2002/91558 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 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 stent, the stent comprising a plurality of first serpentine rings, each first serpentine ring comprising a plurality of first struts and a plurality of second struts, each first strut having a first length, each second strut having a second length, the second length being greater than the first length;

each first serpentine ring further comprising a plurality of first turns and a plurality of second turns;

each first turn engaging two first struts and each second turn engaging two second struts.

2. The stent of claim 1, the stent having a first end, each first turn oriented towards the first end of the stent, and each second turn oriented towards the first end of the stent.

3. The stent of claim 2, wherein the first turns are aligned with one another, the second turns are aligned with one another, and the first turns are offset from the second turns.

4. The stent of claim 1, each first serpentine ring further comprising a plurality of third turns, each third turn engaging a first strut and a second strut.

5. The stent of claim 4, each first turn and each second turn oriented in a first direction and each third turn oriented in a second direction, the first and second directions being opposite directions.

6. The stent of claim 4, wherein the third turns are aligned with one another.

7. The stent of claim 1, each first turn having a first circumferential extent and each second turn having a second circumferential extent, the first circumferential extent being greater than the second circumferential extent.

8. The stent of claim 1, wherein a first distance separates two first struts engaged by a first turn and a second distance separates two second struts engaged by a second turn, the first distance being greater than the second distance.

9. The stent of claim 1, adjacent first serpentine rings being engaged by a plurality of first connectors, each first connector extending between a first turn of one of the adjacent first serpentine rings and a first turn of the other of the adjacent first serpentine rings.

10. The stent of claim 9, wherein adjacent first serpentine rings engaged by a plurality of first connectors define a plurality of first openings having a first shape.

11. The stent of claim 10, wherein adjacent first serpentine rings engaged by a plurality of first connectors further define a second opening having a second shape, the first shape being different than the second shape.

12. The stent of claim 11, the stent further comprising a side hole defined by a continuous band having a plurality of loops.

13. The stent of claim 12, the side hole having a third shape, the third shape being different than the first shape, and the third shape being different than the second shape.

14. The stent of claim 1, the stent having a first end, the stent further comprising a plurality of second serpentine rings, each second serpentine ring comprising a plurality of first struts and a plurality of second struts, each first strut having a first length, each second strut having a second length, the second length being greater than the first length;

each second serpentine ring further comprising a plurality of first turns and a plurality of second turns;

each first turn engaging two first struts and each second turn engaging two second struts;

each first turn of the first serpentine rings oriented towards the first end of the stent, and each second turn of the first serpentine rings oriented towards the first end of the stent;

each first turn of the second serpentine rings oriented towards the second end of the stent, and each second turn of the second serpentine rings oriented towards the second end of the stent.

15. The stent of claim 14, the plurality of first serpentine rings forming a first portion of the stent and the plurality of second serpentine rings forming a second portion of the stent.