Extendible Stent Apparatus and Method for Deploying the Same

• US 20090132028A1
• Filed: 01/26/2009
• Published: 05/21/2009
• Est. Priority Date: 11/04/1996
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Advanced Stent Technologies Inc. (Boston Scientific Corporation)
• Inventors: Vardi, Gil M., Davidson, Charles J.
• Application Number:
  US12/359,872
• Publication Number:
  US 20090132028A1
• Time in Patent Office: Days
• US Class Current: 623/1.350
• 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

An imagable extendable stent apparatus for insertion into a bifurcating vessel or a vessel opening. The stent apparatus comprises a main stent and a flared stent, which may used individually or in combination with each other. The flared stent may be interlocked with the main stent to provide stent coverage over the entire region of a bifurcation. The main stent of the apparatus may be deployed at the bifurcation point of a vessel, allowing unimpeded future access to the side branch of the bifurcated vessel. The flared stent may be employed at vessel openings. Also disclosed and claimed are methods for implanting the extendable stent apparatus into the bifurcation point or the ostium of a subject vessel.

Claims

1. A stent for treatment of a vessel bifurcation, the stent comprising:

a) a main body portion adapted to be positioned in a main vessel and comprising a surrounding side wall defining a passageway, the passageway extending to a first opening at a first end of the main body and a second opening at a second end of the main body;

b) at least one side branch opening provided in the surrounding side wall of the main body portion and in fluid flow communication with the passageway extending to the first opening and the second opening; and

c) a side branch ring provided on the surrounding side wall of the main body portion to surround and define the at least one side branch opening, wherein the side branch ring is sized to be positioned over an opening of a side branch vessel such that the side branch ring is adapted to seat against a side wall of the main vessel surrounding the intersection with the side branch vessel when the main body is positioned in the main artery.

2. The stent of claim 1 wherein the main body is further adapted to receive a secondary body within the at least one side branch opening.

3. The stent of claim 2 wherein at least a portion of the secondary body is engaged to the side branch ring.

4. The stent of claim 3 wherein the at least a portion of the secondary body comprises a flared portion.

5. The stent of claim 1 wherein the at least one side branch opening is generally circular.

6. The stent of claim 1 wherein the at least one side branch opening is at least partially defined by a plurality of radiopaque markers.