Hemodialysis access with on-off functionality
First Claim
1. An arteriovenous graft system, comprising:
- an arteriovenous graft having an arterial end and an opposite venous end;
at least one valve device positioned at the arterial end of said arteriovenous graft; and
a second valve device positioned at the venous end of said arteriovenous graft;
wherein said valve device comprises an inflatable balloon in communication with said arteriovenous graft;
wherein said valve device has a closed position when said inflatable balloon is inflated;
wherein when the valve device is in the closed position, arterial blood flow into the arteriovenous graft is prevented;
wherein said second valve device comprises an inflatable balloon; and
wherein said first valve device and said second valve device substantially prevent blood flow into said arteriovenous graft from either the arterial end or venous end when respective inflatable balloons are inflated.
1 Assignment
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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 within 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.
74 Citations
14 Claims
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1. An arteriovenous graft system, comprising:
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an arteriovenous graft having an arterial end and an opposite venous end; at least one valve device positioned at the arterial end of said arteriovenous graft; and a second valve device positioned at the venous end of said arteriovenous graft; wherein said valve device comprises an inflatable balloon in communication with said arteriovenous graft; wherein said valve device has a closed position when said inflatable balloon is inflated; wherein when the valve device is in the closed position, arterial blood flow into the arteriovenous graft is prevented; wherein said second valve device comprises an inflatable balloon; and wherein said first valve device and said second valve device substantially prevent blood flow into said arteriovenous graft from either the arterial end or venous end when respective inflatable balloons are inflated. - View Dependent Claims (2, 3)
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4. A subcutaneous arteriovenous graft system, comprising:
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an arteriovenous graft having an arterial end and an opposite venous end; a first valve device positioned at the arterial end of said arteriovenous graft; wherein said first valve device comprises; an inflatable balloon; wherein said inflatable balloon is positioned so as to prevent blood flow into the arterial end of said arteriovenous graft when inflated; wherein said inflatable balloon is in communication with a first injection port, and wherein the injection port is configured to be implanted subcutaneously; and a second valve device positioned at the venous end of said arteriovenous graft; wherein said second valve device comprises; an inflatable balloon; wherein the inflatable balloon is positioned so as to prevent blood flow into the venous end of said arteriovenous graft when inflated; wherein the inflatable balloon is in communication with a second injection port.
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5. A process for reducing hyperplasia in an arteriovenous graft, comprising:
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providing an arteriovenous graft having been subcutaneously implanted in a patient; wherein said arteriovenous graft comprises; an arterial end in fluid communication with an artery and a venous end in fluid communication with a vein; and a first valve device positioned at the arterial end of said graft; and closing said first valve device at the arterial end of said arteriovenous graft; whereby blood flow into the arterial end of said arteriovenous graft is stopped; wherein said arteriovenous graft further comprises a second valve device positioned at the venous end of said graft; and wherein the process further comprises the step of closing said second valve device after flushing said graft. - View Dependent Claims (6, 7)
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8. A process for reducing hyperplasia in an arteriovenous graft, comprising:
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providing an arteriovenous graft having been subcutaneously implanted in a patient; wherein said arteriovenous graft comprises; an arterial end in fluid communication with an artery and a venous end in fluid communication with a vein; and a first valve device positioned at the arterial end of said graft; closing said first valve device at the arterial end of said arteriovenous graft; whereby blood flow into the arterial end of said arteriovenous graft is stopped; and delivering a fluid agent inside the ateriovenous graft when the ateriovenous graft is in the closed condition. - View Dependent Claims (9)
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10. A process for reducing hyperplasia in an arteriovenous graft, comprising:
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providing an arteriovenous graft having been subcutaneously implanted in a patient; wherein said arteriovenous graft comprises; an arterial end in fluid communication with an artery and a venous end in fluid communication with a vein; and a first valve device positioned at the arterial end of said graft; closing said first valve device at the arterial end of said arteriovenous graft; whereby blood flow into the arterial end of said arteriovenous graft is stopped; a second valve positioned at the venous end of the ateriovenous graft; wherein said first valve device and said second valve device each comprise an inflatable balloon; purging blood out of the venous end of the ateriovenous graft after the balloon has closed the arterial end; and filling the second balloon to expand upon and engage an internal wall of the ateriovenous graft at the venous end to close off the ateriovenous graft. - View Dependent Claims (11, 12)
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13. An arteriovenous graft system, comprising:
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an arteriovenous graft having an arterial end and an opposite venous end; a first valve device positioned at the arterial end of said arteriovenous graft; and a second valve device positioned at the venous end of said arteriovenous graft; wherein the first and second valve devices have open and closed positions; wherein when the first and second valve devices are in the closed position, arterial blood flow is prevented from flowing into the arteriovenous graft such that the graft retains a column of fluid. - View Dependent Claims (14)
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Specification