Arteriovenous grafts and methods of implanting the same
OwnerPaul Stanishinventor
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Abstract
The invention provides arteriovenous grafts and methods for implanting the same. In one aspect of the invention, there are provided arteriovenous grafts that have a stepped down venous end. In another aspect, the invention provides arteriovenous grafts having cuffs for attachment to a target vein. The invention also provides methods for implanting arteriovenous grafts that include inserting the venous end of a graft into the target vein for positioning downstream of the venotomy site.
Claims44
An arteriovenous graft defining a lumen for passage of blood, comprising:
- a first end defining a first orifice having a first diameter, the first end adapted for placement into a vein with the first orifice positioned at a location spaced downstream from an entry location of the first end into the vein for passage of blood from the lumen into the bloodstream;
- a second end adapted for attachment to an artery;
- and
- a first tubular section between the first and second ends, the first tubular section defining a portion of the lumen having a second, generally constant diameter greater than the first diameter.
An arteriovenous graft defining a lumen for passage of blood, comprising:
- a first end adapted for placement in a vein through a wall of the vein and defining a first orifice having a first diameter;
- a second end adapted for attachment to an artery;
- a first tubular section between the first and second ends, the first tubular section defining a portion of the lumen having a second, generally constant diameter greater than the first diameter;
- and
- a first taper section between the first end and the first tubular section, and having a generally gradually increasing diameter along the first taper section.
An arteriovenous graft defining a lumen for passage of blood, comprising:
- a first end defining a first orifice having a first diameter, the first end adapted for placement into a vein with the first orifice positioned at a location spaced downstream from an entry location of the first end into the vein for passage of blood from the lumen into the bloodstream;
- a second end adapted for attachment to an artery;
- a first tubular section between the first and second ends, the first tubular section defining a portion of the lumen having a second, generally constant diameter greater than the first diameter;
- and
- a cuff affixed to the outer surface of the graft at least about 1 centimeter from the first end, the cuff defining a groove configured for attachment with the vein wall for a venous anastomosis.
A method of implantation, comprising:
- making an incision in the wall of a preselected target vein;
- providing an arteriovenous graft defining a lumen for passage of blood, the graft including:
- a first end adapted for placement in a vein through the incision and defining a first orifice having a first diameter;
- a second end adapted for attachment to an artery;
- a first tubular section between the first and second ends, the first tubular section defining a portion of the lumen having a second, generally constant diameter greater than the first diameter;
- and
- a first taper section between the first end and the first tubular section, and having a generally gradually increasing diameter along the first taper section;
- inserting the first end through the incision into the vein such that the first end passes to a point downstream of the incision;
- securing the graft to the vein wall;
- and
- anastomosing the arterial end of the graft to a preselected target artery.
A method for providing an arteriovenous bypass, comprising:
- providing a graft including a first end defining a first orifice having a first diameter, a second end, and a first tubular section between the first and second ends, the first tubular section defining a portion of the lumen having a second, generally constant diameter greater than the first diameter;
- placing the first end into a vein with the first orifice positioned at a location spaced downstream from an entry location of the first end into the vein for passage of blood from the lumen into the bloodstream;
- and
- attaching the second end to an artery.
Dependencies are inferred from the claim text.