Power supply monitoring for an implantable device
First Claim
1. A method comprising:
- estimating an amount of energy depleted during operation of an implantable medical device based on a first depletion amount and a second depletion amount, wherein the first depletion amount is calculated based on application of first electrical charge depletion rate information associated with an idle mode of the implantable medical device to one or more periods of operation of the implantable medical device in the idle mode, and wherein the second depletion amount is calculated based on application of second electrical charge depletion rate information associated with a stimulation mode of the implantable medical device to one or more periods of operation of the implantable medical device in the stimulation mode;
determining whether a measured voltage across an energy storage device of the implantable medical device is greater than or equal to a transition voltage of the energy storage device;
when the measured voltage is greater than or equal to the transition voltage, determining an amount of energy remaining in the energy storage device based on the estimated amount of energy depleted; and
when the measured voltage is less than the transition voltage, determining the amount of energy remaining in the energy storage device based on a difference between the measured voltage and a voltage associated with end of service of the energy storage device.
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Accused Products
Abstract
A method and an apparatus for projecting an end of service (EOS) and/or an elective replacement indication (ERI) of a component in an implantable device is provided. The method comprises measuring the measured voltage of the energy storage device, and determining whether the measured voltage is less than a transition voltage. When the measured voltage is less than the transition voltage, determining a time period remaining until an end of service of the energy storage device is based upon a function of the measured voltage. When the measured voltage is greater than or equal to the transition voltage, determining a time period remaining until an end of service of the energy storage device is based upon a function of the total charge depleted. The transition voltage is a voltage associated with the transition point of non-linearity in the battery voltage depletion curve.
106 Citations
24 Claims
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1. A method comprising:
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estimating an amount of energy depleted during operation of an implantable medical device based on a first depletion amount and a second depletion amount, wherein the first depletion amount is calculated based on application of first electrical charge depletion rate information associated with an idle mode of the implantable medical device to one or more periods of operation of the implantable medical device in the idle mode, and wherein the second depletion amount is calculated based on application of second electrical charge depletion rate information associated with a stimulation mode of the implantable medical device to one or more periods of operation of the implantable medical device in the stimulation mode; determining whether a measured voltage across an energy storage device of the implantable medical device is greater than or equal to a transition voltage of the energy storage device; when the measured voltage is greater than or equal to the transition voltage, determining an amount of energy remaining in the energy storage device based on the estimated amount of energy depleted; and when the measured voltage is less than the transition voltage, determining the amount of energy remaining in the energy storage device based on a difference between the measured voltage and a voltage associated with end of service of the energy storage device. - View Dependent Claims (2, 3, 4, 5)
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6. A system comprising:
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a processor; and a memory coupled to the processor, the memory storing instructions that are executable by the processor to cause the processor to; estimate an amount of energy depleted during operation of an implantable medical device based on a first depletion amount and a second depletion amount, wherein the first depletion amount is calculated based on application of first electrical charge depletion rate information associated with an inactive state of the implantable medical device to one or more periods of operation of the implantable medical device in the inactive state, and wherein the second depletion amount is calculated based on application of second electrical charge depletion rate information associated with an active state of the implantable medical device to one or more periods of operation of the implantable medical device in the active state; determine whether a measured voltage across an energy storage device of the implantable medical device is greater than or equal to a transition voltage of the energy storage device; when the measured voltage is greater than or equal to the transition voltage, determine an amount of energy remaining in the energy storage device based on the estimated amount of energy depleted; and when the measured voltage is less than the transition voltage, determine the amount of energy remaining in the energy storage device based on a difference between the measured voltage and a voltage associated with end of service of the energy storage device. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification