Bifurcated medical device for treating a target site and associated method

• US 10,517,712 B2
• Filed: 09/02/2016
• Issued: 12/31/2019
• Est. Priority Date: 09/05/2008
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories)
• Inventors: Ren, Brooke, Adams, Daniel O., Oslund, John C.
• Primary Examiner(s): Tolan, Edward T
• Application Number:
  US15/255,233
• Publication Number:
  US 20160367355A1
• Time in Patent Office: 1,215 Days
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0034 D-shaped
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

Embodiments of the present invention provide medical devices and methods for treating a target site within the body. For example, one embodiment provides a stent graft for treating a target site proximate to a bifurcated lumen, wherein the stent graft includes a first tubular structure having proximal and distal ends and a side wall extending therebetween. The first tubular structure includes an opening defined within the side wall and is configured to define a first portion having first and second ends and a second portion having first and second ends. The opening corresponds to the first ends of the first and second portions and the second ends of the first and second portions respectively correspond to the proximal and distal ends of the first tubular structure, and at least a portion of the first and second portions are configured to be positioned within respective branches of a bifurcated lumen.

Claims

1. A method for fabricating a stent graft comprising:

braiding a first tubular structure about a mandrel, the first tubular structure having a proximal end, and a distal end, and a sidewall extending therebetween;

shaping the first tubular structure so as to form first and second portions each having first and second ends, wherein at least a portion of the first and second portions are configured to extend within respective braches of a bifurcated lumen;

defining an opening within the sidewall, wherein the opening is configured to correspond to the first ends of the first and second portions; and

heat setting the first tubular structure.

2. The method of claim 1, wherein braiding comprises braiding a plurality of strands into at least one layer.

3. The method of claim 1, wherein the first tubular structure comprises a corrugated surface.

4. The method of claim 1, wherein shaping comprises folding the first tubular structure along the opening.

5. The method of claim 4, wherein folding comprises folding the first tubular structure along the opening to define a hinge.

6. The method of claim 1, wherein defining comprises forming a cut partially about the circumference of the first tubular structure, and wherein shaping comprises folding the first tubular structure along the cut.

7. The method of claim 1, wherein defining comprises forming a cut partially about a circumference of the first tubular structure and within a bulbous portion positioned between the proximal end and the distal end of the first tubular structure.

8. The method of claim 2, wherein defining comprises displacing braided strands of the first tubular structure to define the opening.

9. The method of claim 8, wherein displacing braided strands of the first tubular structure defines the opening approximately midway between the proximal end and the distal end of the first tubular structure.

10. The method of claim 1, wherein heat setting comprises heat setting the first tubular structure about a pair of D-shaped pins to define the opening.

11. The method of claim 1, wherein shaping comprises shaping the first tubular structure along the opening such that the first and second portions comprise respective lumens extending between proximal and distal ends of the first and second portions that are not in fluid communication with one another.

12. The method of claim 1, further comprising:

coating the first tubular structure with a thrombogenic agent.

13. The method of claim 1, further comprising:

filling the first tubular structure with a polyester fiber.

14. The method of claim 1, further comprising:

attaching a radiopaque marker to at least one of the first end of the first portion and the first end of the second portion.

15. The method of claim 1, further comprising:

attaching one or more hooks to the first tubular structure for facilitating fixation of the first tubular structure to the bifurcated lumen.

16. The method of claim 1, further comprising:

braiding a second tubular structure on a mandrel, the second tubular structure comprising a proximal end and a distal end and lumen extending therebetween.

17. The method of claim 16, further comprising:

defining a pair of openings in the second tubular structure configured to receive the first tubular structure and align the lumen of the second tubular structure with the opening defined in the first tubular structure.

18. The method of claim 17, wherein defining the pair of openings comprises clamping the proximal end of the second tubular structure to define the pair of openings.