Power supply monitoring for an implantable device
First Claim
1. A method for determining the remaining useful life of an energy storage device in an implantable medical device, said energy storage device having a total available electrical charge that may be obtained from said energy storage device, said method comprising:
- determining an active charge depletion of the implantable medical device;
determining an inactive charge depletion of said implantable medical device; and
determining a time period until an end of service of the energy storage device based upon said active charge depletion, said inactive charge depletion, and said total available charge, wherein determining an active charge depletion of an implantable medical device further comprises determining a charge depleted during a previous stimulation performed by said implantable device and determining an active current usage rate for a future stimulation to be performed by said implantable device, wherein determining an active current usage rate for a future stimulation to be performed by said implantable medical device further comprises correlating a first predetermined current usage rate with a first stimulation performed by said implantable device.
5 Assignments
0 Petitions
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 and for determining an impedance experienced by a lead associated with the implantable device. An active charge depletion of an implantable device is determined. An inactive charge depletion of the implantable device is determined. A time period until an end of service (EOS) and/or elective replacement indication (ERI) of a power supply associated with the IMD based upon the active charge depletion, the inactive charge depletion, and the initial and final (EOS) battery charges, is determined. Furthermore, to determine the impedance described above, a substantially constant current signal is provided through a first terminal and a second terminal of the lead. A voltage across the first and second terminals is measured. An impedance across the first and second terminals is determined based upon the constant current signal and the measured voltage.
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Citations
23 Claims
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1. A method for determining the remaining useful life of an energy storage device in an implantable medical device, said energy storage device having a total available electrical charge that may be obtained from said energy storage device, said method comprising:
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determining an active charge depletion of the implantable medical device; determining an inactive charge depletion of said implantable medical device; and determining a time period until an end of service of the energy storage device based upon said active charge depletion, said inactive charge depletion, and said total available charge, wherein determining an active charge depletion of an implantable medical device further comprises determining a charge depleted during a previous stimulation performed by said implantable device and determining an active current usage rate for a future stimulation to be performed by said implantable device, wherein determining an active current usage rate for a future stimulation to be performed by said implantable medical device further comprises correlating a first predetermined current usage rate with a first stimulation performed by said implantable device. - View Dependent Claims (2, 3, 4, 5, 9, 10, 11, 12, 13)
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6. A method for determining the remaining useful life of an energy storage device in an implantable medical device, said energy storage device having a total available electrical charge that may be obtained from said energy storage device, said method comprising:
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determining an active charge depletion of the implantable medical device; determining an inactive charge depletion of said implantable medical device; and determining a time period until an end of service of the energy storage device based upon said active charge depletion, said inactive charge depletion, and said total available charge, wherein determining an inactive charge depletion of an implantable medical device further comprises determining a charge depleted during a previous idle period of said implantable medical device. - View Dependent Claims (14, 15, 16, 17, 18)
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7. A method for determining the remaining useful life of an energy storage device in an implantable medical device, said energy storage device having a total available electrical charge that may be obtained from said energy storage device, said method comprising:
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determining an active charge depletion of the implantable medical device; determining an inactive charge depletion of said implantable medical device; and determining a time period until an end of service of the energy storage device based upon said active charge depletion, said inactive charge depletion, and said total available charge, wherein determining an inactive charge depletion of said implantable medical device further comprises determining an idle current usage rate for a future idle period of said implantable medical device. - View Dependent Claims (8, 19, 20, 21, 22, 23)
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Specification