Device to control magnetic rotor of a programmable hydrocephalus valve
AssigneeDePuy Synthes Products, Inc.
InventorsMartin PFLEIDERER, Toralf BORK
Life of this patent
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Abstract
A setting adjustment tool for a magnetically adjustable device implanted in a patient includes a circumference. A plurality of magnetic coils can be circumferentially distributed on a circumference of the tool. One of the magnetic coils can be movable along the circumference between a plurality of predetermined positions associated with the selectable performance settings. The magnetic coils may also be capable of attracting or repulsing the at least one magnet of the rotor of the implanted device in a radial direction by at least a predetermined angle within a plane of rotation of an at least one magnet of the rotor thereby inducing a rotating moment into the rotor.
Claims20
A method of adjusting a performance setting of a magnetically adjustable device implanted in a patient, the device including a housing with a rotor having an axis of rotation and at least one rotor magnet, the rotor having a range of arcuate motion within each of a plurality of selectable performance settings, and wherein the rotor has an axle which turns about the axis of rotation, the method comprising:
- a magnetoresistive sensor estimating an approximate setting of the rotor of the device;
- activating a first magnet of a setting adjustment tool causing the at least one rotor magnet to move the rotor away from the first magnet;
- activating a second magnet of the setting adjustment tool causing the at least one rotor magnet to move the rotor next to the second magnet;
- activating a third magnet of the setting adjustment tool causing the at least one rotor magnet to move the rotor to a pocket of the device between second and third;
- imaging the device to produce an image of the device moved by the adjustment tool;
- and
- determining a performance setting of the device based on the image.
A setting adjustment tool for a magnetically adjustable device implanted in a patient, the magnetically adjustable device including a rotor having an axis of rotation and at least one rotor magnet, the rotor having a range of arcuate motion within each of a plurality of selectable performance settings, and wherein the rotor has an axle which turns about the axis of rotation, the setting adjustment tool comprising:
- a circumference;
- a plurality of magnetic coils circumferentially distributed on the circumference;
- wherein each magnetic coil is operable to activate and attract or repulse the at least one rotor magnet.
The tool of claim 17, wherein one of the magnetic coils is movable between the extreme counterclockwise and clockwise positions and capable of adjusting the device from a constrained condition setting to an unconstrained condition setting.
A setting adjustment system for a magnetically adjustable device implanted in a patient, the system comprising:
- the magnetically adjustable device including a housing and a rotor having an axis of rotation and at least one rotor magnet, the rotor having a range of arcuate motion within each of a plurality of selectable performance settings, and wherein the rotor has an axle which turns about the axis of rotation;
- a setting adjustment tool operatively connected to the magnetically adjustable device, the tool comprising:
- a circumference and a plurality of magnetic coils circumferentially distributed on the circumference;
- and
- wherein each magnetic coil is operable to activate and attract or repulse the at least one rotor magnet;
- wherein at least one of the magnetic coils is movable along the circumference between a plurality of predetermined positions associated with the selectable performance settings.
Dependencies are inferred from the claim text.