Stent Prosthesis For Vascular Surgery In Particular In The Area Of The Aortic Arch

• US 20080167703A1
• Filed: 02/16/2006
• Published: 07/10/2008
• Est. Priority Date: 02/17/2005
• Status: Active Grant

• Current Assignee: Piotr Kasprzak
• Original Assignee: Piotr Kasprzak
• Inventors: Kasprzak, Piotr
• Granted Patent: US 8,123,796 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2002/061 provided with means for allowing access to secondary lumens
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: Y10S 623/903 Blood vessel

Abstract

A stent prosthesis for vascular surgery for inserting into an artery, particularly for bridging a vascular enlargement in the area of the aortic arch, comprising a tubular flexible and radially expandable stent body, on which at least one tear-proof long thread is attached in a fixed manner at a point of attachment on the outer peripheral surface of the stent body in the front portion thereof. The thread can be recognized under x-ray radiation and has a free thread length of a number of decimeters and, starting from the point of attachment, is exposed outside the stent body so that the stent body, while following the thread, can be passed into the artery and can be placed, by means of the thread, in position inside the artery and can be subsequently fixed to the vascular wall.

Claims

1. A stent prosthesis for vascular surgery for inserting into an artery, comprising a tubular flexible and radially expandable stent body including a peripheral liquid-tight sheathing having a peripheral outer surface and having a front end and a rear end, and at least one tear-proof long thread having a fixed end and a free end, wherein the fixed end is fixedly attached in a tear-proof manner at a point of attachment located directly on the outer surface of the sheathing in a distance from the front end and from the rear end of the sheathing, the thread being recognizable under x-ray radiation and having a free thread length between the fixed and free ends thereof of several decimeters, the free thread length being freely exposed outside the stent body, so that the long thread can be passed into the artery in advance of the stent body and can be caught in the artery and that the implanted stent body can be placed in position in the artery and can subsequently fixed at the vascular wall by means of the thread.

2. A stent prosthesis as claimed in claim 1, wherein the long thread is a double-thread.

3. A stent prosthesis as claimed in claim 1, wherein a first lateral opening is provided in the peripheral sheathing of the stent body and the point of attachment of the long thread is located on the peripheral sheathing in a short distance from the lateral opening.

4. A stent prosthesis as claimed in claim 3, wherein the point of attachment of the long thread is located on the peripheral sheathing of the stent body on that side of the first lateral opening that is averted from the front end of the stent body.

5. A stent prosthesis as claimed in claim 4, wherein an additional long thread is fixedly attached at the peripheral sheathing at a point of attachment at that side of the first lateral opening that faces the front end of the peripheral sheathing of the stent body.

6. A stent prosthesis as claimed in claim 1, wherein a lateral opening is provided in the peripheral sheathing of the stent body and the stent body includes a sleeve portion by which the lateral opening is extended outside of the peripheral sheathing, wherein the point of attachment of the long thread is arranged on the sleeve portion.

7. A stent prosthesis as claimed in claim 3, wherein a second lateral opening is formed in the peripheral sheathing of the stent body offset from the first lateral opening in the circumferential direction of the stent body and offset from the first opening in an axial direction towards the rear end of the stent body.

11. A stent prosthesis as claimed in claim 1, wherein said at least one tear-proof thread includes a plurality of tear-proof threads separately attached in a tear-proof manner at different points of attachment of the peripheral outer surface of the sheathing.

8. A vascular surgery method for implanting a stent prosthesis at an application site in an artery by inserting the stent prosthesis into and through the artery, wherein the stent prosthesis comprises a tubular flexible and radially expandable stent body including an outer peripheral surface,

in which method:

at least one tear-proof long thread is fixed to the outer surface of the stent body in a tear-proof manner, the thread being visible under x-ray radiation and comprising a free thread length of several decimeters that is freely exposed outside the outer peripheral surface of the stent body,

the long thread is passed into streaming blood in the artery in advance of the stent body and is caught in the artery in a region of the application site and is subsequently extracted from the artery through a vascular wall, and

the stent body is passed into the artery subsequently to the thread, and is placed at the application site by means of the thread in a predetermined position and fixed therein to the vascular wall.

9-10. -10. (canceled)