Method and system for powering implantable devices
First Claim
1. A method for powering a medical device implanted in a subject, comprising:
- transmitting radio frequency energy from a power source to an external drive loop that is inductively coupled to an external transmitter resonator; and
magnetically coupling the external transmitter resonator to an implanted receiver resonator that is coupled to a medical device implanted in a subject, such that power is transferred to the implanted medical device;
wherein the magnetic coupling further includes an external relay resonator.
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Abstract
A ventricular assist device (VAD) system includes one or more external subsystems including an amplifier energizing a drive loop with alternating current, and a Tx resonator inductively coupled to the drive loop. An implanted subsystem includes a VAD, an Rx resonator that forms a magnetically coupled resonator with the Tx resonator, and a load loop for providing power to the VAD that is inductively coupled to the Rx resonator. A sensor monitors the drive loop and a controller uses the sensor data to adjust a system parameter to optimize energy transfer performance. Distributing a plurality of the external subsystems throughout a defined space provides a patient with freedom of movement within the defined space.
51 Citations
18 Claims
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1. A method for powering a medical device implanted in a subject, comprising:
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transmitting radio frequency energy from a power source to an external drive loop that is inductively coupled to an external transmitter resonator; and magnetically coupling the external transmitter resonator to an implanted receiver resonator that is coupled to a medical device implanted in a subject, such that power is transferred to the implanted medical device; wherein the magnetic coupling further includes an external relay resonator. - View Dependent Claims (2, 3, 4)
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5. A system for powering an implantable medical device, comprising:
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at least one external subsystem comprising a drive loop, a power source, and a transmitter resonator, wherein the drive loop is inductively coupled to the transmitter resonator when the power source provides radio frequency energy to the drive loop; an implantable subsystem comprising a receiver resonator, a load loop, and a medical device, wherein the load loop is inductively coupled to the receiver resonator and operably connected to the medical device; wherein the transmitter resonator and the receiver resonator are configured to form a magnetic coupling to complete transfer of power from the at least one external subsystem to the implantable subsystem to deliver power from the power source to the medical device, wherein the system further comprises a relay resonator, and wherein the relay resonator forms part of the magnetic coupling. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for powering an implantable medical device, comprising:
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at least one external subsystem comprising a drive loop, a power source, and a transmitter resonator, wherein the drive loop is inductively coupled to the transmitter resonator when the power source provides radio frequency energy to the drive loop; an implantable subsystem comprising a receiver resonator and a medical device, wherein the receiver resonator is operably connected to the medical device; wherein the transmitter resonator and the receiver resonator are configured to form a magnetic coupling to complete transfer of power from the at least one external subsystem to the implantable subsystem to deliver power from the power source to the medical device, wherein the system further comprises a relay resonator, and wherein the relay resonator forms part of the magnetic coupling.
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Specification