Hemodialysis access with on-off functionality
First Claim
1. An AV-fistula graft, comprising:
- a tubular graft body having a tubular wall extending between two opposite end portions and a lumen within the tubular wall extending along a longitudinal axis between the two opposite end portions; and
a valve system coupled to the lumen and that is adjustable between an open condition and a closed condition with respect to the lumen;
wherein in the open condition the tubular graft body is substantially adapted to allow substantial fluid communication through the tubular graft body;
wherein in the closed condition the fluid communication into the tubular graft body is substantially occluded;
wherein the valve system comprises;
first and second valves each having an expandable member coupled to the AV-fistula lumen and that is adjustable between a radially collapsed condition and a radially expanded condition;
wherein the radially collapsed condition characterizes at least in part the open condition for the valve system and allows for fluid communication between anastomoses associated with the two opposite end portions; and
wherein the radially expanded condition characterizes at least in part the closed condition for the valve system and substantially occludes fluid communication into the fistula lumen;
said first and second valves positioned along two opposite ends, respectively, of the AV-fistula graft;
wherein said first and second valves, in the closed condition, close the entire fistula from fluid communication with both of the anastomoses.
1 Assignment
0 Petitions
Accused Products
Abstract
A treatment assembly is positioned along an AV-fistula and couples therapeutic energy to an adjacent area due to a material response to an applied energy field from a remotely located energy source. The treatment assembly may be delivered into the fistula through a hemodialysis needle, or may be secured to the fistula graft itself and implanted therewith in a patient. A cover provides a shield between an anastomosis area and blood flow. Another AV-fistula includes a valved reservoir that receives a fluid agent from a hemodialysis needle while moving the needle into or from the fistula; the agent leaks from the reservoir into the fistula lumen. Another valved fistula is adjustable between an open condition and closed conditions during and between hemodialysis treatments, respectively. Another AV-fistula has a bladder reservoir coupled to a second refillable fluid reservoir and is adapted to locally deliver a therapeutic agent into the fistula lumen.
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Citations
28 Claims
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1. An AV-fistula graft, comprising:
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a tubular graft body having a tubular wall extending between two opposite end portions and a lumen within the tubular wall extending along a longitudinal axis between the two opposite end portions; and a valve system coupled to the lumen and that is adjustable between an open condition and a closed condition with respect to the lumen; wherein in the open condition the tubular graft body is substantially adapted to allow substantial fluid communication through the tubular graft body; wherein in the closed condition the fluid communication into the tubular graft body is substantially occluded; wherein the valve system comprises; first and second valves each having an expandable member coupled to the AV-fistula lumen and that is adjustable between a radially collapsed condition and a radially expanded condition; wherein the radially collapsed condition characterizes at least in part the open condition for the valve system and allows for fluid communication between anastomoses associated with the two opposite end portions; and wherein the radially expanded condition characterizes at least in part the closed condition for the valve system and substantially occludes fluid communication into the fistula lumen; said first and second valves positioned along two opposite ends, respectively, of the AV-fistula graft; wherein said first and second valves, in the closed condition, close the entire fistula from fluid communication with both of the anastomoses. - View Dependent Claims (2, 3)
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4. A hemodialysis method, comprising:
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providing a reservoir that is adapted to couple to an AV-fistula graft; positioning the reservoir externally around the AV-fistula graft; wherein the AV-fistula graft is implanted within a body of a patient and extending between a first and a second anastomosis with a vein and an artery of the patient, respectively; wherein the reservoir defines a cavity separated from fluid flow in the AV-fistula graft; filling the reservoir with a fluid agent; and passively eluting the fluid agent from the reservoir directly to a tissue external to the AV-fistula graft and in proximity to either of the first or second anastomosis. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A hemodialysis method, comprising:
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adjusting an AV-fistula graft, implanted within a patient and extending between an arterial and a venous anastomosis, between an open condition and a closed condition; wherein in the open condition, the AV-fistula graft substantially allows fluid communication between the arterial anastomosis and the venous anastomosis; and wherein in the closed condition the AV-fistula graft substantially prevents fluid communication into the AV-fistula graft between the arterial anastamosis and the venous anastomosis; and filling a balloon within the A-V fistula graft to expand upon and engage an internal wall of the AV-fistula graft to prevent flow into the AV-fistula graft. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A hemodialysis method, comprising:
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providing a bladder reservoir that is adapted to couple to an AV-fistula graft; coupling the bladder reservoir to the AV-fistula graft; implanting the AV-fistula graft within a body of a patient and extending between a first and a second anastomosis with a vein and an artery of the patient, respectively; wherein the bladder reservoir defines a cavity separated from fluid flow in the AV-fistula graft; filling the bladder reservoir with a fluid agent; and passively eluting the fluid agent from the bladder reservoir and into the AV-fistula graft within the patient'"'"'s body; wherein the bladder comprises a first valve adjacent an inside wall of the AV-fistula graft and a second valve opposite said first valve, the method further comprising; delivering at least one needle through the first valve and second valve into the A-V fistula graft; drawing blood from the AV-fistula graft via the at least one needle to a location external to the patient'"'"'s body; treating the blood; and delivering the treated blood into to the AV-fistula fistula graft. - View Dependent Claims (26, 27, 28)
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Specification