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US 6,585,762 B1Granted
Arteriovenous grafts and methods of implanting the same
OwnerPaul Stanishinventor
Life of this patent
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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.
Claims50
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, wherein the first end is adapted to position the first orifice a distance of one to three centimeters from the entry location;
- 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 said first end and said first tubular section, and having a generally gradually increasing diameter along the first taper section.
2 more elements
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, wherein the first end is adapted to position the first orifice a distance of one to three centimeters from the entry location;
- 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.
1 more element
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, wherein said second end defines a second orifice having a third diameter less than the second diameter;
- a first taper section between said first end and said first tubular section, and having a generally gradually increasing diameter along the first taper section;
- a second taper section between said first tubular section and said second end, the second taper section having a generally evenly decreasing diameter;
- and
- a third tubular section between said arterial end and said second taper section, wherein said third tubular section defines a portion of the lumen having a generally constant diameter corresponding to the third diameter, wherein the first diameter is from about 3.5 to about 4.5 millimeters, the second diameter is from about 5.5 to about 6.5 millimeters, and the third diameter is from about 3.5 to about 4.5 millimeters.
4 more elements
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, wherein said second end defines a second orifice having a third diameter less than the second diameter;
- a first taper section between said first end and said first tubular section, and having a generally gradually increasing diameter along the first taper section;
- a second taper section between said first tubular section and said second end, the second taper section having a generally evenly decreasing diameter, wherein said first tubular section has a length that is at least about 60% of the length of the graft.
2 more elements
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 said first end and said 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, wherein the graft is secured to the vein wall using a purse-string suture inserted in a wall of the target vein prior to making the incision;
- and
- anastomosing the arterial end of the graft to a preselected target artery.
8 more elements
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 said first end and said 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, wherein the first end through the incision into the vein such that the first end passes to a point at least about 1 centimeter downstream of the incision;
- securing the graft to the vein wall;
- and
- anastomosing the arterial end of the graft to a preselected target artery.
8 more elements
Dependencies are inferred from the claim text.