Magnetic coupling antennas for implantable medical devices
First Claim
Patent Images
1. An implantable medical device comprising:
- circuitry to process physiological signals carried on at least one lead;
a transceiver to enable communication;
a casing to hold the circuitry and the transceiver; and
a magnetic coupling structure to transfer, via electromagnetic energy, communication signals between the lead and the transceiver.
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Abstract
An implantable medical device is equipped with a magnetic coupling assembly to transfer communication signals to and from the device using electromagnetic energy.
87 Citations
45 Claims
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1. An implantable medical device comprising:
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circuitry to process physiological signals carried on at least one lead;
a transceiver to enable communication;
a casing to hold the circuitry and the transceiver; and
a magnetic coupling structure to transfer, via electromagnetic energy, communication signals between the lead and the transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
a toroid-shaped member with an opening;
a conductor passing through the opening in the toroid-shaped member, the conductor being electrically coupled to the lead;
a winding on the toroid-shaped member; and
wherein the winding and a conductive path containing the conductor and the lead form a transformer that produces a magnetic field for transferring the communication signals.
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5. An implantable medical device as recited in claim 4, wherein the toroid-shaped member is formed of a magnetic material.
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6. An implantable medical device as recited in claim 4, wherein the transceiver is coupled to the winding.
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7. An implantable medical device as recited in claim 1, wherein the magnetic coupling structure comprises:
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a core formed of magnetic material and positioned in an aperture in the casing;
at least one conductor extending along a longitudinal axis of the core, the conductor being coupled to the lead; and
a winding around the core and oriented perpendicularly to the longitudinal axis of the core.
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8. An implantable medical device as recited in claim 7, wherein the core is formed of a magnetic material.
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9. An implantable medical device as recited in claim 7, wherein the core attenuates interference on the conductor.
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10. An implantable medical device as recited in claim 7, wherein the transceiver is coupled to the winding.
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11. An implantable medical device as recited in claim 7, further comprising a ceramic collar to hold the core in the aperture of the casing.
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12. An implantable medical device as recited in claim 1, wherein the casing houses the circuitry and the transceiver in separate chambers to isolate communication signals from interfering with the circuitry.
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13. A network system comprising:
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an implantable medical device comprising, circuitry to process physiological signals carried on at least one lead;
a transceiver to enable communication, a casing to hold the circuitry and the transceiver, and a magnetic coupling structure to transfer, via electromagnetic energy, communication signals between the lead and the transceiver; and
a computing network to link one or more computing systems to the implantable medical device.
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14. A structure for an implantable medical device, comprising:
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a magnetic member having an opening;
a first conductor wound around the member;
a second conductor extending through the opening in the magnetic member; and
the first and second conductors forming respective primary and secondary windings of a transformer that produces a magnetic field to transfer communication signals into and out of the implantable medical device.- View Dependent Claims (15, 16, 17, 18, 19)
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20. A structure for an implantable medical device, the implantable medical device having a casing that houses device circuitry, the structure comprising:
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a core formed of magnetic material and positioned in an opening in the casing of the implantable medical device;
at least one conductor extending along a longitudinal axis of the core; and
a winding around the core and oriented perpendicularly to the longitudinal axis of the core so that passing current through the winding produces an electromagnetic field used in transferring communication signals into and out of the implantable medical device. - View Dependent Claims (21, 22, 23, 24, 25)
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- 26. A feed-through adapted for an implantable medical device comprising at least one conductor embedded substantially along an axis of a core, the core being formed of a magnetic material, the at least one conductor being coupled to a lead.
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30. An implantable medical device, comprising:
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processing means for processing physiological signals carried on one or more leads;
communication means for enabling communication with a remote device; and
magnetic coupling means for transferring, via electromagnetic energy, communication signals between at least one lead and the communication means. - View Dependent Claims (31, 32, 33, 34)
a magnetic annular member encircling the lead; and
a winding on the magnetic annular member through which current is passed to produce the electromagnetic energy, and in which an electromotive force may be induced.
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33. An implantable medical device as recited in claim 30, wherein the magnetic coupling means comprises:
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a core formed of magnetic material;
at least one conductor extending along a longitudinal axis of the core, the conductor being coupled to the lead; and
a winding around the core and oriented perpendicularly to the longitudinal axis of the core, the winding conducting current to produce the electromagnetic energy.
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34. An implantable medical device as recited in claim 30, further comprising casing means for holding the processing means and the communication means in frequency isolation from one another to prevent the communication signals from interfering with the processing means.
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35. A cardiac network system comprising:
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an implantable medical device comprising, processing means for processing physiological signals carried on one or more leads, communication means for enabling communication with a remote device, and magnetic coupling means for transferring, via electromagnetic energy, communication signals between at least one lead and the communication means; and
a computing network to link one or more computing systems to the implantable medical device.
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36. A system comprising:
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an implantable medical device equipped with communication circuitry and configured to be coupled to leads attached to a patient;
an external communication device to communicate with the implantable medical device; and
a magnetic coupling structure to transfer, via electromagnetic energy, communication signals between at least one lead and the communication circuitry of the implantable medical device to enable communication between the implantable medical device and the external communication device. - View Dependent Claims (37, 38, 39, 40, 41, 42)
a toroid-shaped member around the lead, the toroid-shaped member being formed of a magnetic material;
a winding on the toroid-shaped member; and
the winding and the lead forming a transformer that produces a magnetic field for transferring the communication signals.
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42. A system as recited in claim 36, wherein the magnetic coupling structure comprises:
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a core formed of magnetic material and positioned as a feed-through into the casing;
at least one conductor extending along a longitudinal axis of the core, the conductor being coupled to the lead; and
a winding around the core and oriented perpendicularly to the longitudinal axis of the core.
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43. A network system comprising:
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an implantable medical device equipped with communication circuitry and configured to be coupled to at least one lead attached to a patient, the implantable medical device having a magnetic coupling structure to transfer, via electromagnetic energy, communication signals between the lead and the communication circuitry;
an external communication device to communicate with the implantable medical device; and
a computing network linking one or more computing systems with the external communication device to process data received from the implantable medical device. - View Dependent Claims (44, 45)
a toroid-shaped member around the lead, the toroid-shaped member being formed of a magnetic material;
a winding on the toroid-shaped member; and
the winding and the lead forming a transformer that produces a magnetic field for transferring the communication signals.
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45. A network system as recited in claim 43, wherein the magnetic coupling structure comprises:
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a core formed of magnetic material and positioned as a feed-through into the casing;
at least one conductor extending along a longitudinal axis of the core, the conductor being coupled to the lead; and
a winding around the core and oriented perpendicularly to the longitudinal axis of the core.
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Specification