Medical device temperature estimation
First Claim
1. A method comprising:
- sensing, by a temperature sensor, a temperature of an internal portion of an implantable medical device during a charging process;
determining, by processing circuitry and based on the sensed temperature of the internal portion of the implantable medical device and an algorithm, a temperature of a housing of the implantable medical device, the temperature sensor sensing the temperature of the internal portion of the medical device without being thermally coupled to the housing of the medical device,wherein the algorithm is representative of an estimated temperature differential between the internal portion and the housing, the estimated temperature differential determined based on a transfer function, wherein the transfer function is based on a temperature decay curve of the housing; and
controlling, by the processing circuitry, charging of a rechargeable power source of the medical device based on the determined temperature of the housing.
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Accused Products
Abstract
Devices, systems, and techniques for monitoring the temperature of a device used to charge a rechargeable power source are disclosed. Implantable medical devices may include a rechargeable power source that can be transcutaneously charged. The temperature of an external charging device and/or an implantable medical device may be monitored to control the temperature exposure to patient tissue during a charging session used to recharge the rechargeable power source. In one example, a temperature sensor may sense a temperature of an internal portion of a device, wherein the housing of the device is not directly thermally coupled to the temperature sensor. A temperature for the housing of the device may then be estimated based on the sensed temperature provided by the non-thermally coupled temperature sensor. A processor may then control charging of the rechargeable power source based on the determined temperature for the housing.
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Citations
32 Claims
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1. A method comprising:
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sensing, by a temperature sensor, a temperature of an internal portion of an implantable medical device during a charging process; determining, by processing circuitry and based on the sensed temperature of the internal portion of the implantable medical device and an algorithm, a temperature of a housing of the implantable medical device, the temperature sensor sensing the temperature of the internal portion of the medical device without being thermally coupled to the housing of the medical device, wherein the algorithm is representative of an estimated temperature differential between the internal portion and the housing, the estimated temperature differential determined based on a transfer function, wherein the transfer function is based on a temperature decay curve of the housing; and controlling, by the processing circuitry, charging of a rechargeable power source of the medical device based on the determined temperature of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system comprising:
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an implantable medical device comprising a housing enclosing an internal portion; a temperature sensor disposed within the housing and configured to sense a temperature of the internal portion of the implantable medical device without being directly thermally coupled to the housing and without being configured to sense a temperature of the housing; and processing circuitry configured to determine a temperature of the housing based on the sensed temperature of the internal portion and an algorithm, and to control charging of a rechargeable power source of the implanted medical device based on the determined temperature of the housing, wherein the algorithm is representative of an estimated temperature differential between the internal portion and the housing determined based on a transfer function, and wherein the transfer function is based on a temperature decay curve of the housing. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system comprising:
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means for sensing a temperature of an internal portion of an implantable medical device during a charging process without being directly thermally coupled to a housing of the implantable medical device and without being configured to sense a temperature of the housing; means for determining a temperature of the housing of the implantable medical device based on the sensed temperature of the internal portion of the medical device and an algorithm, wherein the algorithm is representative of a temperature differential between the internal portion and the housing determined based on a transfer function, wherein the transfer function is based on a temperature decay curve of the housing; and means for controlling charging of a rechargeable power source of the implantable medical device based on the determined temperature of the housing. - View Dependent Claims (29, 30, 31, 32)
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Specification