Stent with self-deployable portion

• US 20060173528A1
• Filed: 01/10/2006
• Published: 08/03/2006
• Est. Priority Date: 01/10/2005
• Status: Active Grant

• Current Assignee: Trireme Medical Incorporated
• Original Assignee: Trireme Medical Incorporated
• Inventors: Konstantino, Eitan, Feld, Tanhum
• Granted Patent: US 9,114,033 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2002/821 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

Abstract

The present invention provides methods and devices for placement of a stent in a bifurcation or ostial lesion. The stent comprises a main body and a flaring portion. The main body is designed to expand and support a main vessel while the flaring portion deploys at least partially in response to expansion of the main body and is designed to open into and support a side branch or bifurcation ostium area. The stent may also comprise a therapeutic agent which can be delivered to a blood vessel.

Claims

1. A balloon expandable stent comprising:

a main body having a portion which flares at least partially in response to expansion of the main body.

2. The balloon expandable stent of claim 1, wherein the flaring portion is disposed on a side of the main body.

3. The balloon expandable stent of claim 1, wherein the flaring portion is disposed on an end of the main body.

4. The balloon expandable stent of claim 1, wherein the flaring portion comprises a plurality of wings that flare radially outward into a side branch vessel.

5. The balloon expandable stent of claim 1, wherein the flaring portion flares at an angle in the range from 10 to 150 degrees relative to a central axis of the balloon expandable stent.

6. The balloon expandable stent of claim 1, further comprising a leverage mechanism between the main body and the flaring portion, wherein the leverage mechanism transfers displacement and expansion forces from the main body during expansion to the flaring portion.

7. The balloon expandable stent of claim 6, wherein the flaring portion comprises a proximal portion and a distal portion, and the leverage mechanism deflects the distal portion more than the proximal portion, thereby flaring the distal portion at a greater angle than the proximal portion.

8. The balloon expandable stent of claim 1, further comprising a therapeutic agent disposed over at least a portion of the balloon expandable stent.

9. The balloon expandable stent of claim 8, further comprising a polymeric layer, wherein the therapeutic agent is sequestered in the polymer layer.

10. A method for delivering a balloon expandable stent comprising:

positioning a stent having a main body in a vessel at an ostial opening to a vessel side branch; and

expanding the main body so that a portion of the main body flares at least partially in response to expansion of the main body, thereby stabilizing the stent in the main vessel and deflecting a portion of the balloon expandable stent into the ostial opening.

11. The method of claim 10, wherein expanding the main body flares a portion of the main body disposed on a side of the main body.

12. The method of claim 10, wherein expanding the main body flares a portion of the main body disposed on an end of the main body.

13. The method of claim 10, further comprising providing a therapeutic agent disposed over at least a portion of the balloon expandable stent.

14. The method of claim 13, further comprising providing a polymeric layer, wherein the therapeutic agent is sequestered in the polymeric layer.