MECHANISM FOR SECURING TO A CORPOREAL LUMEN AND METHOD OF MANUFACTURING

• US 20100222871A1
• Filed: 04/30/2010
• Published: 09/02/2010
• Est. Priority Date: 04/11/2000
• Status: Active Grant

• Current Assignee: Lifeport Sciences LLC (Acacia Research Corporation)
• Original Assignee: EndoVascular Technologies Incorporated (Boston Scientific Corporation)
• Inventors: Johansson, Peter, Pollock, David T.
• Granted Patent: US 7,998,194 B2
• Time in Patent Office: Days
• US Class Current: 623/1.360
• 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 2/90 characterised by a net-like or mesh-like structure
• 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 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: Y10T 29/19 Eyebolt or hook making

Abstract

An improved hood provides for the attaching of endoluminal prosthesis within corporeal lumens. The hook is integrally formed with framing structure and is preset into an outward bend, but is resiliently flexible so as to form a substantially straight profile when compressed. The hook is capable of impinging upon the corporeal lumen and thereby securing the prosthesis. The hook may be configured for intraluminal delivery and deployment. A novel method of manufacturing said hook is also provided.

Claims

1. A mechanism for securing an endoprosthesis to corporeal tissue of a corporeal lumen, the mechanism comprising:

a tubular frame;

an elongate member having a first end attached to the tubular frame and a second end that is movable away from the tubular frame so as to impinge upon corporeal tissue;

a stress relief cut-out formed through the tubular frame and located adjacent the first end of the elongate member; and

an incision formed through the tubular frame, the incision extending from the stress relief cut-out and around the second end.

2. The mechanism of claim 1, wherein the stress relief cut-out is circular.

3. The mechanism of claim 1, wherein the stress relief cut-out is wider than the incision.

4. The mechanism of claim 1, wherein the tubular frame has a compressed configuration at which the elongate member is in alignment with the tubular frame and an expanded configuration at which the elongate member is disposed radially outwardly from the tubular frame.

5. The mechanism of claim 1, wherein the elongate member is bounded by the frame.

6. The mechanism of claim 1, wherein the elongate member is predisposed with an outward curve.

7. The mechanism of claim 1, wherein:

the elongate member includes a middle portion between the first end and the second end; and

the tubular frame has a compressed configuration at which the second end of the elongate member extends a first distance from the frame in a first direction and at which the middle portion extends a second distance from the frame in a second direction opposite the first direction.

8. The mechanism of claim 1, wherein the tubular frame lacks an internal structure located along a central axis of the tubular frame.

9. The mechanism of claim 1, wherein:

the tubular frame has a frame end defining an opening; and

the tubular frame lacks a structure at the frame end extending across the opening.

10. A mechanism for securing an endoprosthesis to corporeal tissue of a corporeal lumen, the mechanism comprising:

a tubular frame with a stress-relief cut-out formed through the tubular frame;

an elongate member attached to the tubular frame adjacent the stress relief cut-out, the elongate member having a pointed end movable away from the tubular frame so as to impinge upon corporeal tissue, the elongate member formed on the tubular frame by an incision through the frame and extending from the stress relief cut-out to the second end.

11. The mechanism of claim 10, wherein the stress relief cut-out is circular.

12. The mechanism of claim 10, wherein the stress relief cut-out is wider than the incision.

13. The mechanism of claim 10, wherein the tubular frame has a compressed configuration at which the elongate member is in alignment with the tubular frame and an expanded configuration at which the elongate member is disposed radially outwardly from the tubular frame.

14. The mechanism of claim 10, wherein the elongate member is bounded by the frame.

15. The mechanism of claim 10, wherein the elongate member is predisposed with an outward curve.

16. The mechanism of claim 10, wherein:

the elongate member includes a middle portion adjacent the pointed end; and

the tubular frame has a compressed configuration at which the pointed end of the elongate member extends a first distance from the frame in a first direction and at which the middle portion extends a second distance from the frame in a second direction opposite the first direction.

17. The mechanism of claim 10, wherein the tubular frame lacks an internal structure located along a central axis of the tubular frame.

18. The mechanism of claim 10, wherein:

the tubular frame has a frame end defining a tubular opening; and

the tubular frame lacks a structure at the frame end extending across the tubular opening.

19. A method of manufacturing a mechanism for securing an endoprosthesis to corporeal tissue of a corporeal lumen, the method comprising:

forming an elongate member on a tubular frame having a pointed end movable from the frame so as to impinge upon corporeal tissue, including removing material from the frame to form an incision extending around the pointed end and removing additional material from the frame to form a stress relief cut-out located at an end of the incision.

20. The method of claim 19 further comprising forcing the pointed end of the elongate member away from the frame.

22. The method of claim 19, wherein forming the elongate member includes making the stress relief cut-out wider than the incision.

21. The method of claim 29 further comprising heat setting the elongate member to have an outward curve.