Implantable power management system
First Claim
1. A method for managing the power supplied to a power source of an implantable medical device comprising the steps of:
- (a) providing charging circuitry for a power source in an implantable medical device;
(b) selecting from software in the charging circuitry the correct charge/discharge regimen for the specific power source in the implantable device;
(c) charging the power supply with the correct regimen of current and voltage limits for the specific power; and
,(d) non-invasively up-grading the regimen for charging the power source, by down-loading, via a direct telemetry link or telephone link, new software revisions to the regimen.
1 Assignment
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Accused Products
Abstract
The method and system for managing power supplied from a charging circuit to a power source in an implantable medical device comprises the steps of and circuitry for: measuring the current drain of the medical device; measuring the elapsed time since the last full charge of a power source of the device; calculating the actual capacity of the power source (corrected for fade) based on the variable of current drain and the variable of elapsed time; calculating the operating time based on the variable of current drain and the variable of the actual capacity of the power source; measuring the voltage of the power source; signaling the medical device when the power source voltage has reached a certain low value which requires disconnection from the power source; disconnecting, during discharging, the power source from the medical device upon the power source reaching a certain low voltage in order to prevent deep discharging of the power source and subsequent damage; precisely limiting the charging voltage to the power source in order to prevent overcharging beyond safe limits; disconnecting, during charging, the power source from the charging circuit upon the power source reaching a certain high voltage in order to prevent overcharging of the power source and subsequent damage; sensing when the electromagnetic waves being transmitted by an RF transmitter/charger induce a voltage level above a certain value at an RF receiver of the implanted power management system; reconnecting power supply inputs of the medical device to the power source upon sensing this induced high voltage level; monitoring the temperature of the power source during charging and discharging; disconnecting the charging circuitry from the power source if the temperature of the power source raises above a certain level during charging; reconnecting the charging circuitry to the power source when the temperature of the power source drops below a certain low value during charging; disconnecting the implanted medical device from the power source if the temperature of the power source raises above a certain level during discharging; and, reconnecting the medical device to the power source when the temperature of the power source drops below a certain low value during discharging.
94 Citations
2 Claims
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1. A method for managing the power supplied to a power source of an implantable medical device comprising the steps of:
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(a) providing charging circuitry for a power source in an implantable medical device; (b) selecting from software in the charging circuitry the correct charge/discharge regimen for the specific power source in the implantable device; (c) charging the power supply with the correct regimen of current and voltage limits for the specific power; and
,(d) non-invasively up-grading the regimen for charging the power source, by down-loading, via a direct telemetry link or telephone link, new software revisions to the regimen.
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2. A system for managing the power supplied to a power source of an implantable medical device comprising:
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charging circuitry for a power source in an implantable medical device; software in the charging circuitry for the correct charge/discharge regimen for the specific power source in the implantable device; charging the power supply with the correct regimen of current and voltage limits for the specific power source; and
,circuitry for non-invasively up-grading the regimen for charging the power source, including circuitry for down-loading, via a direct telemetry link or telephone link, new software revisions to the regimen.
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Specification