System and method for establishing vascular access
First Claim
1. A method for establishing vascular access, said method comprising:
- forming a percutaneous tissue tract to a target blood vessel;
positioning a guidewire through the tissue tract;
positioning a radially expandable sleeve in direct contact with and over the guidewire and through the tissue tract with a distal end in the blood vessel and a proximal end outside the tissue tract, wherein the expandable sleeve is in a narrow diameter configuration; and
inserting the dilator over the guidewire and into the radially expandable sleeve to radially expand the expansible sleeve to a larger diameter configuration to provide an access lumen to the blood vessel.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems, kits, and methods for establishing vascular access are described. A system typically includes a radially expandable sleeve, a dilator, and a guidewire. The methods comprise positioning the guidewire through an initial tissue tract, passing the radially expandable sleeve over the guidewire through the tissue tract to a target blood vessel, and thereafter passing the dilator over the guidewire and through the radially expandable sleeve to effect radial expansion of the sleeve. Use of the sleeve reduces the risk of injuring tissue surrounding the tissue tract by lessening the axial forces imparted to the tissue. Kits comprise at least the radially expandable sleeve together with instructions for use.
66 Citations
25 Claims
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1. A method for establishing vascular access, said method comprising:
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forming a percutaneous tissue tract to a target blood vessel;
positioning a guidewire through the tissue tract;
positioning a radially expandable sleeve in direct contact with and over the guidewire and through the tissue tract with a distal end in the blood vessel and a proximal end outside the tissue tract, wherein the expandable sleeve is in a narrow diameter configuration; and
inserting the dilator over the guidewire and into the radially expandable sleeve to radially expand the expansible sleeve to a larger diameter configuration to provide an access lumen to the blood vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for establishing vascular access, said method comprising:
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forming a percutaneous tissue tract to a target blood vessel;
positioning a guidewire through the tissue tract;
positioning a radially expandable sleeve directly over the guidewire and through the tissue tract with a distal end in the blood vessel and a proximal end outside the tissue tract, wherein the expandable sleeve is in a narrow diameter configuration, wherein the radially expandable sleeve comprises a tubular braid formed of a mesh of non-elastic filaments which axially shorten the braid upon radial expansion thereof;
introducing a dilator over the guidewire, and into and through the expandable sleeve to increase the diameter of the expandable sleeve to a larger diameter; and
removing an inner dilator portion of the dilator from the expandable sleeve and leaving a sheath of the dilator interposed between the guidewire and the expandable sleeve, wherein the shaft causes the expandable sleeve to retain the larger diameter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An improved method for establishing vascular access, said method being of the type wherein a tapered dilator is introduced over a guide wire to enlarge a percutaneous tissue tract, wherein the improvement comprises introducing a radially expandable sleeve directly over the guidewire prior to introducing the dilator, wherein the radial expandable sleeve comprises a tubular braid formed of a mesh of non-elastic filaments which axially shorten the braid upon radial expansion thereof, and thereafter introducing the dilator over the guidewire and into the sleeve, whereby axial forces on the tissue from the dilator are reduced.
Specification