Apparatus and method for exercising a battery for an implantable medical device
First Claim
1. An implantable medical device for implantation into a patient, comprising:
- a battery having an electrode that develops a resistive film;
a low deformation-rate capacitor capable of storing a charge from the battery, the capacitor requiring few or no periodic discharges of the battery for reformation; and
means for periodically discharging energy from the battery into the low deformation-rate capacitor to reduce film buildup on the electrode.
1 Assignment
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Accused Products
Abstract
Methods and apparatus of the invention include one or more of the following: (a) a battery having an electrode that develops a resistive film from inadequate discharge events, (b) a non- or slowly-deforming capacitor capable of storing a charge from the battery, the capacitor requiring no or few periodic battery discharges for reforming oxide, (c) means for periodically discharging the battery to reduce the film on the electrode, (d) a lead for sensing physiologic electrical signals of a patient, (e) a status system for monitoring cardiac activity of the patient, (f) a therapy delivery system for delivering therapeutic electrical energy to the patient, (g) a means for determining elapsed time since a therapy delivery event occurred and/or battery discharge adequate to remove film, (h) a means for optimizing battery discharge, and (i) a means for optimizing the time between discharging the battery.
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Citations
37 Claims
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1. An implantable medical device for implantation into a patient, comprising:
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a battery having an electrode that develops a resistive film;
a low deformation-rate capacitor capable of storing a charge from the battery, the capacitor requiring few or no periodic discharges of the battery for reformation; and
means for periodically discharging energy from the battery into the low deformation-rate capacitor to reduce film buildup on the electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable cardioverter defibrillator comprising:
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a lead for applying electrical energy to the patient;
a battery having an electrode for powering the implantable cardioverter defibrillator, the battery having an electrode that develops a film on it over time due to a lack of battery discharge;
an ICD status system for monitoring heart activity of the patient through the lead;
a therapy delivery system for delivering electrical energy through the lead to a heart of the patient;
a capacitor capable of storing a charge from the battery, the capacitor requiring no periodic discharges of the battery for reformation; and
means for periodically discharging the battery to reduce film buildup on the electrode. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of exercising a battery of an implantable medical device, comprising:
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determining whether a film is disposed on a portion of an electrode of a battery; and
discharging the battery a sufficient amount to reduce the film disposed on a portion of the electrode of the battery. - View Dependent Claims (21, 22, 23)
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17. A method according to clam 16, further comprising:
- optimizing energy used during exercising the battery.
- View Dependent Claims (18, 19, 20)
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24. A method of exercising a battery of an implantable cardiac defibrillator, comprising:
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determining a period of time elapsed since a cardiac therapy was administered to a patient or since a battery exercising session was performed;
resuming normal implantable cardiac defibrillator operation if the last therapy or exercising session was less than a predetermined amount of time; and
charging a capacitor with a predetermined amount of energy if the last therapy or exercising session was performed a greater time than the predetermined time. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A computer readable medium for storing instructions for performing a method of exercising a battery of an implantable cardiac defibrillator, comprising:
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instructions for determining a period of time elapsed since a cardiac therapy was administered to a patient or since a battery exercising session was performed;
instructions for resuming normal implantable cardiac defibrillator operation if the last therapy or exercising session was less than a predetermined amount of time; and
instructions for charging a capacitor with a predetermined amount of energy if the last therapy or exercising session was performed a greater time than the predetermined time. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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Specification