System and method for monitoring power source longevity of an implantable medical device
First Claim
1. A system, comprising:
- a circuit implantable within a patient;
a power source having a useful life, the power source being implantable within the patient to supply power to the circuit; and
a power source longevity monitor, comprising;
an energy counter configured to count the amount of energy used by the circuit;
a voltage monitor configured to monitor the voltage of the power source; and
a calculator configured to predict longevity of the power source based on the amount of energy used by the circuit during one percentage of the useful life of the power source and to predict longevity of the power source based on the voltage during another percentage of the useful life of the power source.
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Abstract
Power source longevity monitor for an implantable medical device. An energy counter counts the amount of energy used by the implantable medical device. An energy converter converts the energy used into an estimate of remaining power source longevity and generating an energy longevity estimate. A voltage monitor monitors the voltage of the power source. A voltage converter converts the voltage monitored by the voltage monitor into an estimate of remaining longevity of the power source and generating a voltage longevity estimate. A calculator is operatively coupled to the energy converter and to the voltage converter and predicts the power source longevity using the energy longevity estimate early in the useful life of the power source and using the voltage longevity estimate later in the useful life of the power source.
72 Citations
27 Claims
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1. A system, comprising:
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a circuit implantable within a patient; a power source having a useful life, the power source being implantable within the patient to supply power to the circuit; and a power source longevity monitor, comprising; an energy counter configured to count the amount of energy used by the circuit; a voltage monitor configured to monitor the voltage of the power source; and a calculator configured to predict longevity of the power source based on the amount of energy used by the circuit during one percentage of the useful life of the power source and to predict longevity of the power source based on the voltage during another percentage of the useful life of the power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of monitoring longevity of a power source, having a voltage and a useful life, supplying power to a circuit implantable in a patient, comprising the steps of:
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counting the amount of energy used by the circuit; monitoring the voltage of the power source; predicting the longevity of the power based on the amount of energy used by the circuit during one percentage of the useful life of the power source and predicting longevity of the power source based on the voltage during another percentage of the useful life of the power source. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A system, comprising:
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a circuit implantable within a patient; a power source having a useful life, the power source being implantable within the patient to supply power to the circuit; means for counting the amount of energy used by the circuit; means for monitoring the voltage of the power source; and means for predicting the longevity of the power based on the amount of energy used by the circuit during one percentage of the useful life of the power source and predicting longevity of the power source based on the voltage during another percentage of the useful life of the power source.
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Specification