Flow control method and device
First Claim
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1. A device, for controlling flow in a bodily vessel, said device comprising:
- an implantable enclosure;
an actuator disposed within the implantable enclosure, the actuator configured to engage and to adjustably constrict said bodily vessel, the actuator comprising a rotatable member coupled to a drive shaft of an electrical micromotor via a rotary to linear transmission,a receiver disposed within the implantable enclosure, the receiver operatively coupled to the actuator to selectively adjust a degree of constriction applied by the rotatable member responsive to a signal received from an external control; and
an external control device configured to telemetrically supply a signal to the receiver to control operation of the actuator.
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Abstract
An arterio-venous graft (16) is provided with a constriction device (20) near its arterial end. The constriction device (20) is used to reduce the flow through the AV graft under normal conditions and to relieve the constriction when high flow through the AV graft is required, such as for vascular access for hemodialysis.
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Citations
39 Claims
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1. A device, for controlling flow in a bodily vessel, said device comprising:
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an implantable enclosure; an actuator disposed within the implantable enclosure, the actuator configured to engage and to adjustably constrict said bodily vessel, the actuator comprising a rotatable member coupled to a drive shaft of an electrical micromotor via a rotary to linear transmission, a receiver disposed within the implantable enclosure, the receiver operatively coupled to the actuator to selectively adjust a degree of constriction applied by the rotatable member responsive to a signal received from an external control; and an external control device configured to telemetrically supply a signal to the receiver to control operation of the actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of flow control in an AV graft, comprising:
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providing an implantable enclosure housing an actuator configured to engage and to adjustably constrict said AV graft, the actuator comprising a rotatable member coupled to a drive shaft of an electrical micromotor via a rotary to linear transmission, a receiver disposed within the implantable enclosure and operatively coupled to said actuator to selectively adjust a degree of constriction applied by the rotatable member responsive to a signal received from an external control; providing an external control device configured to telemetrically supply a signal to the receiver to control operation of the actuator; implanting the implantable enclosure so that the actuator engages said AV graft; and operating the external control device to selectively constrict said AV graft at its arterial end. - View Dependent Claims (37, 38, 39)
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Specification