Implantable cardioverter defibrillator with switchable power source and patient warning system cardiac device
First Claim
1. A method of using a multiple cell power supply in an implantable cardiac stimulation device, comprising:
- connecting a fast battery cell to an output node to power stimulation device functions;
connecting the fast battery cell to a dense battery cell having a greater power capacity than the fast battery cell, so that the dense battery cell is capable of recharging the fast battery cell upon demand;
detecting if the fast battery cell or dense battery cell becomes a failing battery cell;
electrically disconnecting the failing battery cell from the other battery cell and from the output node;
allowing the other battery cell to replace the failing battery cell in powering the stimulation device functions; and
providing a warning signal upon disconnection of the failing battery cell.
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Accused Products
Abstract
A system and method are provided for using a multiple cell power supply in an implantable medical device such as an implantable cardioverter defibrillator. In a two-cell battery network, a higher energy density cell continuously charges a lower density cell, and the lower density cell provides the current needed for device functions. A current sensor detects the current flowing between the two cells. If the current deviates from an acceptable normal range, one battery cell is failing. The battery network is then reconfigured by opening and closing intervening switches such that the failing cell is eliminated and the remaining cell continues to power device functions. Upon eliminating a failing battery cell, a patient warning signal is issued.
31 Citations
31 Claims
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1. A method of using a multiple cell power supply in an implantable cardiac stimulation device, comprising:
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connecting a fast battery cell to an output node to power stimulation device functions;
connecting the fast battery cell to a dense battery cell having a greater power capacity than the fast battery cell, so that the dense battery cell is capable of recharging the fast battery cell upon demand;
detecting if the fast battery cell or dense battery cell becomes a failing battery cell;
electrically disconnecting the failing battery cell from the other battery cell and from the output node;
allowing the other battery cell to replace the failing battery cell in powering the stimulation device functions; and
providing a warning signal upon disconnection of the failing battery cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An implantable cardiac stimulation device capable of using a multiple cell power supply, the device comprising:
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a fast battery cell connected to an output node to power stimulation device functions, and to a dense battery cell having a greater power capacity than the fast battery cell, so that the dense battery cell is capable of recharging the fast battery cell upon demand;
a sensor that detects if the fast battery cell or dense battery cell becomes a failing battery cell;
a switch that electrically disconnects the failing battery cell from the other battery cell and from the output node, and that further connects the other battery cell to the output node; and
a warning mechanism that provides a warning signal based on detection of the failing battery cell. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. An implantable cardiac stimulation device capable of using a multiple cell power supply, the device comprising:
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a fast energy storage means connected to an output node to power stimulation device functions, and to a dense energy storage means having a greater power capacity than the fast energy storage means, so that the dense energy storage means is capable of recharging the fast energy storage means upon demand;
sensing means for detecting a failing energy storage means;
means for electrically disconnecting the failing energy storage means from a non failing energy storage means and from the output node, and for allowing the non failing energy storage means to replace the failing energy storage means in powering the stimulation device functions; and
means for providing a warning signal upon disconnection of the failing energy storage means. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A method of using a multiple cell power supply in an implantable cardiac stimulation device, comprising:
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connecting a first battery cell to an output node to provide power for stimulation device functions;
connecting the first battery cell to a second battery cell so that the second battery cell is capable of recharging the first battery cell upon demand;
detecting if the first or second battery cell becomes a failing battery cell;
electrically disconnecting the failing battery cell;
if the other battery cell is not connected to the output node, connecting the other battery cell to the output node; and
providing a warning signal after detecting the failing battery cell.
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Specification