Method for delivering a luminal prosthesis

• US 7,972,369 B2
• Filed: 07/20/2007
• Issued: 07/05/2011
• Est. Priority Date: 10/13/2004
• Status: Expired due to Fees

• Current Assignee: Poseidon Medical Inc.
• Original Assignee: Tryton Medical, Inc.
• Inventors: Kaplan, Aaron V., Vargas, Jaime
• Primary Examiner(s): Jackson; Gary
• Assistant Examiner(s): DOWE, KATHERINE MARIE
• Application Number:
  US11/781,201
• Publication Number:
  US 20080015678A1
• Time in Patent Office: 1,446 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.35
• US Class Current: 623/1.12
• 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 2/97 the outer sleeve being splittable
• 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 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

An embodiment of the invention provides a prosthesis delivery system comprising a delivery catheter having an expandable member and a prosthesis carried over the expandable member. The prosthesis includes a radially expandable scaffold section and at least two anchors extending axially from an end thereof; and means for capturing at least the anchors to prevent the anchors from divaricating from the expandable member as the catheter is advanced through a patient'"'"'s vasculature.

Claims

1. A method for delivering a luminal prosthesis, said method comprising:

providing a delivery catheter which carries the prosthesis, wherein the prosthesis comprises a radially expansible scaffold section, at least two anchors each having a distal end coupled with a proximal end of the scaffold section, and at least one opening extending through a side wall of the prosthesis between the at least two anchors and between the scaffold and proximal ends of the anchors, wherein, when expanded the opening defines a passage;

advancing the delivery catheter to position the prosthesis at a target location in a body lumen, the target location including an Os opening from a main body lumen to a branch body lumen, wherein at least the anchors are radially constrained to prevent divarication from the delivery catheter;

positioning the prosthesis so that the scaffold lies within the branch body lumen and all of the anchors extend into the main body lumen;

expanding the scaffold within the branch body lumen and expanding at least two anchors so that all of the anchors extend into and in a same upstream blood flow direction within the main body lumen when expanded; and

deploying a second prosthesis within the passage through the at least one opening.

2. A method as in claim 1, further comprising releasing the radial constraint, wherein releasing and expanding occur simultaneously or releasing occurs during expanding.

3. A method as in claim 2, wherein the radial constraint comprises folds of a balloon covering the anchors, wherein the constraint is released as the balloon is inflated.

4. A method as in claim 2, wherein the radial constraint comprises a cuff which extends over the anchors.

5. A method as in claim 2, wherein the constraint comprises a tether which ties the anchors together, wherein the tether is broken by expansion of the scaffold.

6. A method as in claim 1, wherein the radial constraint is released prior to expanding the scaffold.

7. A method as in claim 6, wherein the radial constraint comprises a cuff which extends over the anchors, wherein the cuff is withdrawn from the anchors prior to expansion of the scaffold.

8. A method as in claim 7, wherein prior to withdrawal, the cuff extends over at least a portion of the scaffold.

9. A method as in claim 6, wherein the radial constraint comprises a tether which ties the anchors together, wherein the tether is withdrawn prior to expansion.

10. A method as in claim 1, wherein expanding the scaffold deforms the anchors to circumscribe at least a portion of the main-body lumen.

11. A method as in claim 10, wherein at least three circumferential anchors extend into the main body lumen.

12. A method as in claim 10, wherein positioning the prosthesis comprises aligning a visible marker on at least one of the prosthesis and a delivery balloon with the os.

13. A method as in claim 10, wherein the lumens are blood vessels.

14. A method as in claim 10, wherein the scaffold is expanded with a balloon expanded within the scaffold.

15. A method as in claim 14, wherein the anchors are deformed by expanding a balloon positioned transversely through the anchors.

16. A method as in claim 15, wherein the scaffold and anchors are expanded and deformed by the same balloon.

17. A method as in claim 15, wherein the scaffold and anchors are expanded and deformed by different balloons.

18. A method as in claim 10, further comprising expanding the second prosthesis within the passage through the anchors.

19. A method as in claim 1, further comprising:

circumferentially deforming the anchors to circumscribe at least a portion of a wall of the main body lumen and open the passage through the anchors.

20. A method as in claim 1, wherein the second prosthesis is deployed by a balloon catheter exchanged over a guidewire pre-positioned for deformation of the anchors.

21. A method as in claim 1, wherein the anchors are deformed by deployment of the second prosthesis.

22. A method as in claim 1, wherein the deployed second prosthesis supports the anchors over their lengths from the os over the main body lumen wall.

23. A method as in claim 1, further comprising releasing the radial constraint.

24. The method of claim 1, further comprising circumferentially deforming the anchors such that the anchors circumscribe the main body lumen to reach a wall of the main body lumen opposite the Os opening.

25. A method for delivering a luminal prosthesis, said method comprising:

providing a delivery catheter which carries the prosthesis, wherein the prosthesis comprises a radially expansible scaffold section and at least two anchors each extending directly from an end thereof;

advancing the delivery catheter to position the prosthesis at a target location in a body lumen, the target location including an Os opening from a main body lumen to a branch body lumen, wherein at least the anchors are radially constrained to prevent divarication from the delivery catheter;

positioning the prosthesis so that the scaffold lies within the branch body lumen and all of the anchors traverse the Os opening and extend into the main body lumen; and

expanding the scaffold within the branch body lumen and expanding at least two anchors so that all of the anchors extend into and in a same upstream blood flow direction within the main body lumen and traverse the Os opening when fully deployed.