Bifurcated stent with improvement securement

• US 8,298,278 B2
• Filed: 03/07/2006
• Issued: 10/30/2012
• Est. Priority Date: 03/07/2006
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Gregorich, Daniel, Meyer, Michael P.
• Primary Examiner(s): McDermott, Corrine M
• Assistant Examiner(s): MASHACK, MARK F
• Application Number:
  US11/369,473
• Publication Number:
  US 20070213811A1
• Time in Patent Office: 2,429 Days
• Field of Search: 623/1.11, 623 115- 116, 623/1.2, 623/1.35, 623/1.1, 606/191
• US Class Current: 623/1.15
• 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 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2250/0048 differing in mechanical expandability, e.g. in mechanical, self- or balloon expandability

Abstract

A stent assembly includes a branch portion and a main body with a proximal main body, a contralateral main body, and a distal main body. The branch portion is in fluid communication with the main body. In the expanded state the branch portion extends at an oblique angle in relation to the longitudinal axis. The main body and the branch portion are at least partially constructed of interconnected struts. A plurality of the struts are connected one to another by a peak. The distal main body has a greater peak width to strut width ratio than does the proximal main body and contralateral main body.

Claims

1. A stent comprising:

a central portion comprising a branch portion and a contralateral main body, the contralateral main body comprising at least one partial serpentine band attached to the branch portion;

a plurality of proximal serpentine bands located proximal to the central portion;

a plurality of distal serpentine bands located distal to the central portion;

each serpentine band comprising of a repeating waveform, said waveform comprising alternating struts and peaks, the distal serpentine bands having a greater peak width than the proximal serpentine bands, the distal serpentine bands having narrower struts than the proximal serpentine bands.

2. The stent assembly of claim 1 wherein a peak width to strut width ratio of at least one distal serpentine band is about 3 to 1.

3. The stent assembly of claim 1 disposed about at least one catheter balloon.

4. The stent assembly of claim 3 wherein the branch portion is deployed using a second balloon.

5. The stent assembly of claim 1 wherein the peaks of the distal serpentine bands are wider than the peaks of the rest of the stent.

6. The stent assembly of claim 1 wherein a partial serpentine band comprises a smaller peak width to strut width ratio than a distal serpentine band.

7. The stent of claim 1 wherein the distal serpentine bands have less peaks than the proximal serpentine bands.

8. The stent of claim 1, wherein the stent comprises stainless steel or nickel titanium.