Dialysis valve and method
First Claim
Patent Images
1. An implantable dialysis valve device, comprising:
- an implantable valve actuation apparatus sized to fit in a body limb;
a flexible implantable tube portion coupled to the implantable valve actuation apparatus and configured to convey blood, the flexible implantable tube portion comprising a flexible polymer material and a nitinol structure;
a blood input graft portion in fluid communication with the flexible implantable tube portion and being configured to attach with a blood vessel for receiving blood;
a blood output graft portion in fluid communication with the flexible implantable tube portion and being configured to attach with another blood vessel for outputting blood; and
the implantable valve actuation apparatus comprising;
a self-sealing membrane configured to be repeatedly punctured when the self-sealing membrane is implanted adjacent to an underside of a skin region, a hydraulic port proximate to the self-sealing membrane such that the self-sealing membrane is positioned between the hydraulic port and the skin region when the self-sealing membrane is implanted adjacent to the underside of the skin region, a controllable valve actuation member in fluid communication with the hydraulic port, wherein the controllable valve actuation member is movable, in response to pressurized injection of a hydraulic fluid through the self-sealing membrane and the hydraulic port to act upon the controllable valve actuation member, to alter the flexible implantable tube portion from an open configuration in which blood flows into the flexible implantable tube portion for a dialysis treatment to a second configuration,wherein the flexible implantable tube portion extends through the controllable valve actuation member.
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Abstract
A dialysis valve includes a tube attached between an artery and a vein which, when elongated, simultaneously narrows in diameter at at least one location. The narrowed portion of the tube decreases the volume and velocity between the arterial and venous side of the patient to prevent damage or intimal hyperplasia on the venous side between dialysis treatments. When the valve is opened for dialysis, an unrestricted blood flow exists between the arterial and venous side, permitting a controlled, open blood flow during dialysis.
36 Citations
20 Claims
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1. An implantable dialysis valve device, comprising:
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an implantable valve actuation apparatus sized to fit in a body limb; a flexible implantable tube portion coupled to the implantable valve actuation apparatus and configured to convey blood, the flexible implantable tube portion comprising a flexible polymer material and a nitinol structure; a blood input graft portion in fluid communication with the flexible implantable tube portion and being configured to attach with a blood vessel for receiving blood; a blood output graft portion in fluid communication with the flexible implantable tube portion and being configured to attach with another blood vessel for outputting blood; and the implantable valve actuation apparatus comprising;
a self-sealing membrane configured to be repeatedly punctured when the self-sealing membrane is implanted adjacent to an underside of a skin region, a hydraulic port proximate to the self-sealing membrane such that the self-sealing membrane is positioned between the hydraulic port and the skin region when the self-sealing membrane is implanted adjacent to the underside of the skin region, a controllable valve actuation member in fluid communication with the hydraulic port, wherein the controllable valve actuation member is movable, in response to pressurized injection of a hydraulic fluid through the self-sealing membrane and the hydraulic port to act upon the controllable valve actuation member, to alter the flexible implantable tube portion from an open configuration in which blood flows into the flexible implantable tube portion for a dialysis treatment to a second configuration,wherein the flexible implantable tube portion extends through the controllable valve actuation member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An implantable dialysis valve device, comprising:
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a flexible implantable tube that extends a longitudinal length, has a substantially smooth inner surface, and is operable to receive blood from a first blood vessel and output the blood to second blood vessel when implanted, the flexible implantable tube comprising a nitinol structure; a blood input graft portion in fluid communication with the flexible implantable tube portion and being configured to attach with a blood vessel for receiving blood; a blood output graft portion in fluid communication with the flexible implantable tube portion and being configured to attach with another blood vessel for outputting blood; and an implantable valve actuation apparatus sized to fit in a body limb proximate to the first and second blood vessels that is coupled to the flexible implantable tube, further comprising; a self-sealing membrane configured to be repeatedly punctured by an infusion needle when the self-sealing membrane is implanted adjacent to an underside of a skin region, and a controllable valve actuation member in fluid communication with the self-sealing membrane, wherein the flexible implantable tube extends through the controllable valve actuation member, and the controllable valve actuation member is configured to, in response to pressurized injection of a hydraulic fluid through the self-sealing membrane and into the controllable valve actuation member, alter the flexible implantable tube from an open configuration in which blood flows into the flexible implantable tube for a dialysis treatment to a second configuration. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification