Dialysis valve and method
First Claim
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1. An implantable dialysis valve device, comprising:
- an implantable valve actuation device sized to fit in a body limb;
a blood input tube portion connected with the implantable valve actuation device to attach with a blood vessel for receiving blood when the implantable valve actuation device is implanted;
a blood output tube portion connected with the implantable valve actuation device to attach with a blood vessel for outputting blood when the implantable valve actuation device is implanted;
a flexible implantable tube portion coupled to the implantable valve actuation device and configured to convey blood received from the blood input tube portion, the flexible implantable tube portion comprising a flexible polymer material; and
the implantable valve actuation device 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.
34 Citations
22 Claims
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1. An implantable dialysis valve device, comprising:
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an implantable valve actuation device sized to fit in a body limb; a blood input tube portion connected with the implantable valve actuation device to attach with a blood vessel for receiving blood when the implantable valve actuation device is implanted; a blood output tube portion connected with the implantable valve actuation device to attach with a blood vessel for outputting blood when the implantable valve actuation device is implanted; a flexible implantable tube portion coupled to the implantable valve actuation device and configured to convey blood received from the blood input tube portion, the flexible implantable tube portion comprising a flexible polymer material; and the implantable valve actuation device 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. A method of controlling blood flow for dialysis treatments, comprising:
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implanting an implantable dialysis valve device in a body limb proximate to a vein, wherein said implanting comprises; inserting a self-sealing membrane of an implantable valve actuation device of the implantable dialysis valve adjacent to an underside of a skin region such that the self-sealing membrane is configured to be repeatedly punctured, the self-sealing membrane being positioned between a hydraulic port of the implantable valve actuation device and the skin region; attaching a blood input tube portion connected with the implantable valve actuation device to a blood vessel for receiving blood into the blood input tube portion, the blood input tube portion being in fluid communication with a flexible implantable tube portion of the implantable dialysis valve so that the flexible implantable tube portion is configured to convey blood received by the blood input tube portion, the flexible implantable tube portion comprising a flexible polymer material; and attaching a blood output tube portion connected with the implantable valve actuation device to another blood vessel for outputting blood into an internal blood stream after a dialysis treatment; and after implanting the implantable dialysis valve device in the body limb, penetrating the self-sealing membrane of the implantable valve actuation device to deliver a pressurized injection of a hydraulic fluid through the self-sealing membrane and the hydraulic port of the implantable valve actuation device; in response to the pressurized injection of the hydraulic fluid through the self-sealing membrane and the hydraulic port of the implantable valve actuation device, adjusting a 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 (16, 17, 18, 19, 20, 21, 22)
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Specification