Single-piece endoprosthesis with high expansion ratios and atraumatic ends

• US 6,942,690 B1
• Filed: 03/04/2002
• Issued: 09/13/2005
• Est. Priority Date: 04/11/2000
• Status: Expired due to Fees

• Current Assignee: Abbott Vascular Solutions, Inc. (Abbott Laboratories Incorporated)
• Original Assignee: EndoVascular Technologies Incorporated (Boston Scientific Corporation)
• Inventors: Newhauser, Richard, Iancea, Octavian, Pollock, David T.
• Primary Examiner(s): Bui, Vy Q.
• Application Number:
  US10/090,473
• Time in Patent Office: 1,289 Days
• Field of Search: 606/108, 606/191, 606/192, 606/194, 606/195, 606/198, 606/200, 623 11- 12
• US Class Current: 623/1.15
• 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 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• 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 2002/91533 characterised by the phase between adjacent bands
• 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 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped

Abstract

A new endoluminal prosthesis for use in sealing a vascular graft to corporeal lumen provides for a flattened bulbous tail at the end of each cell of the prosthesis. The flattened bulbous tails reduce the amount of wear between the prosthesis and the softer material of the vascular grafts or corporeal lumen walls. A method of manufacturing a stent from a flat sheet of material is also included.

Claims

1. A prosthesis, comprising:

a plurality of cells defined by struts having a first width, each cell having a bottom end and a top end, the struts defining a surface exterior of the cell;

a flattened bulbous tail attached to the surface exterior of the cell adjacent the bottom end of at least more than one of the cells; and

a flattened bulbous tail attached to the surface exterior of the cell adjacent the top end of at least more than one of the cells;

wherein the flattened bulbous tails include a perimeter, a tail surface extending across a lateral face of the tail surface bounded by the perimeter, the lateral surface having a second width greater than the first width.

2. The prosthesis of claim 1, wherein the bottom end of each cell includes a flattened bulbous tail.

3. The prosthesis of claim 1, wherein the top end of each cell includes a flattened bulbous tail.

4. The prosthesis of claim 1, the flattened bulbous tails at the bottom end of the cells contouring into the body of the prosthesis and the flattened bulbous tails at the top end of the cells contouring into the body of the prosthesis.

5. The prosthesis of claim 1, wherein:

adjacent flattened bulbous tails at the bottom end of the cells are staggered longitudinally; and

adjacent flattened bulbous tails at the top end of the cells are staggered longitudinally.

6. The prosthesis of claim 1, further comprising:

a substantially rounded edge about the circumference of the prosthesis at the bottom end; and

a substantially rounded edge about the circumference of the prosthesis at the top end.

7. The prosthesis of claim 1, further comprising:

a substantially chamferred edge about the circumference of the prosthesis at the bottom end; and

a substantially chamferred edge about the circumference of the prosthesis at the top end.

8. A prosthesis, comprising:

a plurality of cells defined by struts having a first width, each cell having a bottom end and a top end, the struts defining a surface exterior the cell;

a flattened bulbous tail attached to the surface exterior the cell adjacent the bottom end of each cell, wherein adjacent flattened bulbous tails are staggered longitudinally and each flattened bulbous tail contours into the body of the prosthesis; and

a flattened bulbous tail attached to the surface exterior the cell adjacent the top end of each cell, wherein adjacent flattened bulbous tails are staggered longitudinally and each flattened bulbous tail contours into the body of the prosthesis;

wherein the flattened bulbous tails embody a continuous surface that has a second width greater than the first width.

9. The prosthesis of claim 8, further comprising:

a substantially rounded edge about the circumference of the prosthesis at the bottom end; and

a substantially rounded edge about the circumference of the prosthesis at the top end.

10. The prosthesis of claim 8, further comprising:

a substantially chamferred edge about the circumference of the prosthesis at the bottom end; and

a substantially chamferred edge about the circumference of the prosthesis at the top end.