End of life battery testing in an implantable medical device
First Claim
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1. An implantable cardioverter/defibrillator comprising:
- a battery;
a power capacitor system for temporarily holding electrical charge prior to delivery to a patient;
charging circuitry coupling the battery to the power capacitor system and creating a voltage-step-up from the battery to the power capacitor system; and
operational circuitry for controlling and delivering therapy, the operational circuitry being configured to direct a battery test sequence during which;
the battery, via the charging circuitry, charges the ICD power capacitor for a predetermined amount of time; and
after the predetermined amount of time is expired, the voltage on the ICD power capacitor is measured.
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Abstract
An implantable cardioverter/defibrillator (ICD) having a battery, the ICD being configured to perform a battery test sequence wherein the battery, via charging circuitry, charges the ICD power capacitor for a predetermined amount of time. After the predetermined amount of time is expired, the voltage on the ICD power capacitor is measured. Also included are methods of testing an ICD battery comprising charging the ICD power capacitor via charging circuitry for a predetermined amount of time. After the predetermined amount of time is expired, the voltage on the ICD power capacitor is measured.
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Citations
14 Claims
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1. An implantable cardioverter/defibrillator comprising:
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a battery; a power capacitor system for temporarily holding electrical charge prior to delivery to a patient; charging circuitry coupling the battery to the power capacitor system and creating a voltage-step-up from the battery to the power capacitor system; and operational circuitry for controlling and delivering therapy, the operational circuitry being configured to direct a battery test sequence during which; the battery, via the charging circuitry, charges the ICD power capacitor for a predetermined amount of time; and after the predetermined amount of time is expired, the voltage on the ICD power capacitor is measured. - View Dependent Claims (2, 3, 4)
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5. A method of checking the battery of an implantable cardioverter defibrillator (ICD), the ICD comprising a battery coupled via a charger to an ICD power capacitor, the capacitor being coupled to output circuitry, the method comprising:
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selectively charging the ICD power capacitor for a predetermined period of time; measuring a voltage on the ICD power capacitor after the predetermined period of time; and comparing the measured voltage to a replacement threshold for determining whether the ICD battery requires replacement. - View Dependent Claims (6, 7, 8, 9, 10)
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11. An implantable cardioverter/defibrillator comprising:
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a battery; means for storing electrical energy for delivery to a patient; charging circuitry coupling the battery to the means for storing electrical energy and creating a voltage-step-up from the battery to the means for storing electrical energy; and operational circuitry for controlling and delivering therapy, the operational circuitry being configured to direct a battery test sequence during which; the battery, via the charging circuitry, charges the means for storing electrical energy for a predetermined amount of time; and after the predetermined amount of time is expired, the voltage on the means for storing electrical energy is measured. - View Dependent Claims (12, 13, 14)
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Specification