Bifurcated axially flexible stent

• US 7,105,019 B2
• Filed: 06/04/2001
• Issued: 09/12/2006
• Est. Priority Date: 01/26/1996
• Status: Expired due to Fees

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Hojeibane, Hikmat
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US09/874,335
• Publication Number:
  US 20010056297A1
• Time in Patent Office: 1,926 Days
• Field of Search: 623 111- 135, 623/23.7, 606/194
• US Class Current: 623/1.35
• 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 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude 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 2002/91541 Adjacent bands are arranged out of phase
• 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 2250/006 modular

Abstract

There is disclosed a method of stent placement which comprises first guiding a guidewire through the vasculature. Second, a balloon catheter which contains two guidewire lumens is strung along the guidewire into position at the bifurcation. The distal opening of the second guidewire lumen abuts the proximal end of the bifurcation. Thereafter, a second guidewire is strung through the first balloon catheter and out the distal opening of the second guidewire lumen. Thus, resident in the second bifurcation leg is the second guidewire. Then, a second standard stent delivery balloon catheter is guided along the second guidewire to a position within the bifurcation. Typically, expansion of both stents can be done one right after the other after proper placement of the first and second balloons.

Claims

1. A bifurcated stent comprising:

a proximal tubular section;

a first distal tubular section, said first distal tubular section connected to said proximal section by connector members; and

a second distal tubular section, said first and second distal tubular sections welded together at their proximal ends;

wherein the weld is a spot weld formed between a dowel and a hole.

4. The stent of claim 1 wherein said distal end and proximal sections are expandable to different diameters.

2. A bifurcated stent comprising:

a proximal tubular section;

a first distal tubular section, said first distal tubular section connected to said proximal section by connector members; and

a second distal tubular section, said first and second distal tubular sections welded together at their proximal ends;

wherein the shape of the connection is different than the strut shape of the proximal and distal sections.

3. The stent of claim 2 wherein the connector members are omega-shaped.

5. A stent comprising a first cylindrical form and a second cylindrical form connected thereto;

said second cylindrical form having a wall portion placed alongside a wall portion of the first cylindrical form and forming a series of strut shaped connectors thereat so that the stent forms a “

Y”

-shaped opening through the interior portion of the stent without any overlap of said wall portion; and

said stent having a welded connection at the connectors between said first and second cylindrical forms;

wherein said welded connection is accomplished around the entire circumference of said second cylindrical form.

6. The stent of claim 5 wherein said second cylindrical form has a smaller interior diameter than said first cylindrical form.

7. The stent of claim 5 wherein said stent is sized to fit within a bifurcated lumen.

8. The stent of claim 5 wherein said stent is balloon expandable.

9. The stent of claim 5 wherein said first cylindrical form contains an opening formed in the wall of said cylindrical form, and said opening generally corresponding to the circumference of said second cylindrical form.

10. A bifurcated stent comprising:

a proximal tubular section;

a first distal tubular section, said first distal tubular section connected to said proximal section by connector members; and

a second distal tubular section, said first and second distal tubular sections attached together at their proximal ends by a ball and socket joint.