Tubular endoluminar prosthesis having oblique ends

• US 5,800,520 A
• Filed: 11/05/1996
• Issued: 09/01/1998
• Est. Priority Date: 03/10/1995
• Status: Expired due to Term

• Current Assignee: Medtronic Ave Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Lenker, Jay A., Fogarty, Thomas J.
• Primary Examiner(s): Yu, Mickey
• Assistant Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US08/744,130
• Time in Patent Office: 665 Days
• Field of Search: 623/1, 623/12, 606/108, 606/194, 606/195
• US Class Current: 623/1.37
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• 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 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

An intraluminar prosthesis includes a tubular member having at least one end which is at an oblique angle to the lumen. The prosthesis is inserted into a body lumen, such as a blood vessel, while compressed. The prosthesis is expanded within the lumen, and the oblique end of the prosthesis contacts the lumen at an oblique angle. This oblique angle reduces the stenotic effect of hyperplasia which generally occurs at the ends of intraluminal prostheses.

Claims

1. An intravascular prosthesis comprising a tubular member having a proximal end, a distal end, a lumen, and a luminal axis, wherein the tubular member is insertable within a blood vessel in a small diameter configuration, and is expandable within the blood vessel to an expanded diameter configuration, wherein at least one of the proximal end and the distal end has a terminal edge which is disposed substantially at an oblique angle relative to the luminal axis so that the terminal edge will contact a surrounding blood vessel wall approximately along an oblique cross section when expanded therein, and wherein the terminal edge defines a continuous oblique angle at a side portion and a plurality of cantilevered elements at a top and bottom portion.

2. A method for treatment of a diseased blood vessel comprising:

inserting a tubular intravascular prosthesis into the blood vessel using a percutaneous or cutdown endoluminal procedure;

positioning the intravascular prosthesis at a target location within the blood vessel wherein the intravascular prosthesis includes at least one end having a terminal edge disposed at an oblique angle relative to a longitudinal axis along the tubular member; and

expanding the intravascular prosthesis at the target location within the blood vessel so that the entire terminal edge contacts a luminal surface along an oblique cross sectional region of the blood vessel, the entire terminal edge defining a uni-directional continuous oblique reference line when perceived at a right angle from the luminal axis, so that occlusion of the blood vessel resulting from hyperplasia is reduced.

3. A method as in claim 2, wherein the intravascular prosthesis is expanded by inserting a balloon catheter into the intravascular prosthesis and expanding the intravascular prosthesis by inflating the balloon catheter, the intravascular prosthesis remaining expanded after removal of the balloon catheter.

4. A method as in claim 2, wherein the intravascular prosthesis is expanded by restraining the intravascular prosthesis in a radially compressed mode prior to positioning, and by releasing the intravascular prosthesis at the target location.

5. A method as in claim 2, wherein expanding the intravascular prosthesis comprises inserting a balloon catheter into at least one end of the intravascular prosthesis and expanding the at least one end by inflating the balloon catheter, and wherein expanding the intravascular prosthesis also comprises restraining a middle portion of the intravascular prosthesis in a radially compressed mode prior to positioning and releasing the middle portion at the target location.

6. A method as in claim 2, wherein both the proximal and distal ends have terminal edges disposed at oblique angles relative to the axis, both terminal edges contacting the luminal surface over oblique cross sections.