IMPLANT HEAT PROTECTION
First Claim
1. An implantable medical device, comprising:
- a resonant tank circuit including an implantable coil coupled to an external coil of an external charging device via an inductive link so as to receive power from the external charging device via the inductive link;
a rechargeable battery electrically connected to the resonant tank circuit so as to be charged using the power received from the external charging device; and
a controller configured to;
determine when charging of the rechargeable battery should be terminated, anddetune the resonant tank circuit in accordance with a predetermined pattern to signal to the external charging device that charging of the rechargeable battery should be terminated.
1 Assignment
0 Petitions
Accused Products
Abstract
Presented herein are techniques for protecting an implantable component of a medical device from the buildup of excessive heat following a charging process. In one embodiment, the implantable component includes a resonant tank circuit that includes an implantable coil that receives power from the external charging device via an inductive link. The implantable component includes a rechargeable battery that is electrically connected to the resonant tank circuit and that can be recharged using the power received from the external charging device. A controller in the implantable component is configured to determine when charging of the rechargeable battery should be terminated and, in response, detune the resonant tank circuit in accordance with a predetermined pattern to signal to the external charging device that charging of the rechargeable battery should be terminated.
2 Citations
24 Claims
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1. An implantable medical device, comprising:
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a resonant tank circuit including an implantable coil coupled to an external coil of an external charging device via an inductive link so as to receive power from the external charging device via the inductive link; a rechargeable battery electrically connected to the resonant tank circuit so as to be charged using the power received from the external charging device; and a controller configured to; determine when charging of the rechargeable battery should be terminated, and detune the resonant tank circuit in accordance with a predetermined pattern to signal to the external charging device that charging of the rechargeable battery should be terminated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15)
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10. A method, comprising:
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at a resonant tank circuit of an implantable medical device tuned to a first resonant frequency, receiving power from an external charging device via an inductive power link; using the received power to charge a rechargeable battery that is electrically connected to the resonant tank circuit; determining that the rechargeable battery has reached an end-of-charge condition; sending, using the inductive power link, a predetermined signaling code to the external charger to disable transmission of power by the external charging device; and after sending the predetermined signaling code, detuning the resonant tank circuit to a second frequency.
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16. A method, comprising:
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transferring power signals from an external coil of a charging device to an implantable coil of an implantable medical device, wherein the external coil and implantable coil are coupled via an inductive link; monitoring the inductive link for a predetermined implant detuning sequence; and upon detection of the predetermined implant detuning sequence, reducing the transfer of the power signals from the external coil to the implantable coil to substantially zero. - View Dependent Claims (17, 18, 19, 20, 21)
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22. An implantable medical device, comprising:
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a resonant tank circuit including an implantable coil coupled to an external coil of an external charging device via an inductive link so as to receive power from the external charging device via the inductive link; a rechargeable battery electrically connected to the resonant tank circuit so as to be charged using the power received from the external charging device over a first frequency; and a controller configured to; determine when charging of the rechargeable battery should be terminated, change the arrangement of the resonant tank circuit in accordance with a predetermined sequence so as to cause a corresponding sequence of detectable load changes at the external charging device; and detune the resonant tank circuit to a second frequency. - View Dependent Claims (23, 24)
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Specification