EXPANDABLE ENDOPROSTHESES, SYSTEMS, AND METHODS FOR TREATING A BIFURCATED LUMEN

• US 20110288622A1
• Filed: 05/18/2010
• Published: 11/24/2011
• Est. Priority Date: 05/18/2010
• Status: Active Grant

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Inventors: Chan, Gregory W., Lee, Carol M., Boylan, John F., Kalvass, Laura M., Stamberg, Barbara E.
• Granted Patent: US 9,402,754 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• 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 2002/065 Y-shaped blood vessels
• 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 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

An endoprosthesis for treating a bifurcated lumen. The distal end of the endoprosthesis can include at least two wings and at least two troughs so the endoprosthesis can adequately scaffold the ostium of a bifurcated lumen by at least partially straddling the carina of the lumen bifurcation. The distal end of the endoprosthesis can also be configured to have increased expandability to help allow conformity to the anatomy of a bifurcated lumen.

Claims

1. An expandable endoprosthesis, comprising:

a tubular body having a distal end and a proximal end, the distal end including at least two distally extending wing portions and at least two proximally extending recesses, the at least two distally extending wing portions and at least two proximally extending recesses being formed from at least one concentric ring having a plurality of alternating crests and valleys aligned in a wave pattern.

2. The endoprosthesis as recited in claim 1, wherein the proximal end of the body is configured to expand from a contracted diameter to a first expanded diameter and at least a portion of the distal end of the body being configured to expand from the contracted diameter to a second expanded diameter that is larger than the first expanded diameter.

3. The endoprosthesis as recited in claim 1, wherein apices of the crests and valleys of the at least one concentric ring of the distal end have a semi-circular shape and are connected together by curved strut members.

4. The endoprosthesis as recited in claim 1, wherein the at least one concentric ring of the distal end comprises ten crests.

5. The endoprosthesis as recited in claim 1, wherein the at least one concentric ring of the distal end is secured to an adjacent concentric ring by at least one angled inter-connector that extends between offset apices of valley and an adjacent crest.

6. An expandable endoprosthesis, comprising:

a tubular body having a distal end and a proximal end;

the proximal end of the body being configured to expand from a contracted diameter to a first expanded diameter; and

at least a portion of the distal end of the body being configured to expand from the contracted diameter to a second expanded diameter that is larger than the first expanded diameter;

wherein the distal end includes at least two distally extending wing portions formed from a web structure having a plurality of alternating crests and valleys.

7. The endoprosthesis as recited in claim 6, further comprising at least two recessed portions extending proximately into the distal end of the tubular body between the at least two distally extending wing portions such that the distal end includes alternating wing portions and recessed portions.

8. The endoprosthesis as recited in claim 7, wherein the two or more recessed portions and the two or more wing portions are sized and shaped to allow the distal end of the tubular body to straddle a carina of a bifurcated lumen.

9. The endoprosthesis as recited in claim 7, wherein the alternating wing portions and recessed portions are defined at least in part by at least one concentric ring, the at least one concentric ring including a plurality of alternating crests and valleys.

10. The endoprosthesis as recited in claim 9, wherein the at least one concentric ring is aligned in a wave pattern such that the peaks of the wave pattern define the at least two wing portions and the troughs of the wave pattern define the at least two recessed portions.

11. The endoprosthesis as recited in claim 6, wherein the distal end of the tubular body is formed from a web structure including a plurality of walnut shaped cells.

12. An expandable, intraluminal endoprosthesis, comprising:

a tubular body having proximal and distal ends and a lumen extending therebetween;

at least two wing portions extending distally from the distal end of the tubular body, the at least two wing portions including a web structure having plurality of alternating crests and valleys; and

at least two recessed portions extending proximately into the distal end of the tubular body;

wherein the distal end is configured in size and shape such that when deployed proximate a bifurcated lumen the at least two recessed portions straddle the carina of the bifurcated lumen and the at least two wing portions extend into and along the lateral walls of the side branches of the bifurcated lumen.

13. The endoprosthesis as recited in claim 12, wherein the tubular body comprises a web pattern that varies along its length to correspond with the anatomy of a bifurcated lumen.

14. The endoprosthesis as recited in claim 13, wherein the tubular body comprises:

a proximal portion with a web pattern configured to uniformly expand from a contracted diameter to a first expanded diameter; and

a distal portion with a web pattern configured to expand from the contracted diameter to a second expanded diameter larger than the first expanded diameter.

15. The endoprosthesis as recited in claim 14, wherein the distal portion comprises a plurality of concentric rings having a plurality of alternating crests and valleys, the plurality of concentric rings being aligned in a wave pattern.

16. The endoprosthesis as recited in claim 14, further comprising a central portion with a web pattern differing from the web patterns of the proximal portion and the distal portion.

17. An expandable endoprosthesis for treating a bifurcated lumen, comprising:

a first set of concentric rings including a plurality of alternating crests and valleys defining a proximal end of a tubular body, wherein at least one crest or valley of each concentric ring of the first set of concentric rings is directly joined to a crest or valley of an adjacent concentric ring of the first set of concentric rings;

a second set of concentric rings including a plurality of alternating crests and valleys defining a distal end of the tubular body, wherein at least one crest or valley of each concentric ring of the second set of concentric rings is indirectly joined to a crest or valley of an adjacent concentric ring of the second set of concentric rings by one or more inter-connecter elements; and

wherein the distal end of the tubular body includes at least two distally extending wing portions formed by the plurality of alternating crests and valleys of the second set of concentric rings.

18. The endoprosthesis as recited in claim 17, further comprising at least two recessed portions extending proximately into the distal end of the tubular body between the at least two distally extending wing portions such that the distal end includes alternating wing portions and recessed portions.

19. The endoprosthesis as recited in claim 17, wherein the one or more inter-connector elements is angled and secures an apex of a crest of one concentric ring to an apex of a valley of an adjacent concentric ring.

20. The endoprosthesis as recited in claim 17, wherein the distal most concentric ring of the second set of concentric rings includes ten crests.

21. The endoprosthesis as recited in claim 17, wherein the second set of concentric rings are aligned in a wave pattern such that the peaks of the wave pattern at least partially define the at least two wing portions and the troughs of the wave pattern define at least two recessed portions extending proximately into the distal end of the tubular body.

22. An intraluminal endoprosthesis deployment system comprising:

a first guidewire for placement in a first side branch of a bifurcated lumen;

a second guidewire for placement within a second side branch of the bifurcated lumen;

a delivery device for tracking along the first and second guidewires to a position proximate the carina of the bifurcated lumen; and

an endoprosthesis having;

a tubular body having a distal end and a proximal end;

wherein the distal end includes at least two distally extending wing portions formed from at least one concentric ring having a plurality of alternating crests and valleys aligned in a wave pattern.

23. The deployment system as recited in claim 22, wherein the endoprosthesis is self-expanding.

24. The deployment system as recited in claim 22, wherein the delivery device is a balloon catheter.

25. The deployment system as recited in claim 22, wherein the endoprosthesis further comprises at least two recessed portions extending proximately into the distal end of the tubular body between the at least two distally extending wing portions such that the distal end includes alternating wing portions and recessed portions.

26. A method for delivering an endoprosthesis to a bifurcated lumen, the method comprising:

positioning a first guidewire within a main lumen of a patient proximate a lumen bifurcation such that the first guidewire extends from the main lumen into a first lumen side branch;

positioning a second guidewire within the main lumen proximate the lumen bifurcation such that the second guidewire extends from the main lumen into a second lumen side branch;

tracking a catheter including an endoprosthesis with a distal end having increased expandability along the first and second guidewires to a deployment position proximate the lumen bifurcation; and

deploying the endoprosthesis such that the distal end covers the ostium of the lumen bifurcation without contacting carina of the lumen bifurcation.

27. The method as recited in claim 26, further comprising:

extending a first wing of the endoprosthesis at least partially into and along the lateral wall of the first lumen side branch; and

extending a second wing of the endoprosthesis at least partially into and along the lateral wall of the second lumen side branch.

28. The method as recited in claim 26, wherein deploying the endoprosthesis comprises:

expanding a proximal end of the endoprosthesis from a contracted diameter to a first expanded diameter; and

expanding at least a portion of the distal end of the endoprosthesis from the contracted diameter to a second expanded diameter larger than the first expanded diameter.

29. The method as recited in claim 26, further comprising compressing the endoprosthesis into a delivery configuration and inserting the endoprosthesis within a lumen of the delivery device.

30. The method as recited in claim 26, wherein deploying the endoprosthesis comprises inflating a pair of balloon around which the endoprosthesis is contracted.