Implantable cardioverter defibrillator having a rechargeable, fast-charging battery and method thereof
First Claim
1. An implantable cardiac rhythm management device, comprising:
- a pulse generator adaptively configured to generate electric shocks for delivery to a patient'"'"'s heart comprising;
at least one output capacitor;
charging circuitry capable of charging the at least one capacitor to produce high voltage shocks for delivery to the patient'"'"'s heart;
a first battery, switchably coupled to the charging circuitry, having the characteristic of a high current flow rate to fast charge the at least one capacitor;
a second battery, switchably connected in parallel to the first battery, having characteristics that enable the second battery to recharge the first battery;
a detector, coupled to the charging circuitry that detects when the recharging current is above a predetermined threshold indicative of abnormal recharging within the first battery; and
a controller programmed to switchably enable the charging circuitry to produce the high voltage shocks, and to disable the second battery whenever an abnormal recharging current is detected.
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Accused Products
Abstract
An implantable cardiac device has a pulse generator configured to generate electric shocks for delivery to a patient'"'"'s heart. The device has an output capacitor, and connected charging circuitry. A first battery is switchably coupled to the charging circuitry, and has a high current flow rate to rapidly charge the capacitor. A second battery is switchably connected in parallel to the first battery, and is operable to recharge the first battery. A detector coupled to the charging circuitry detects when the recharging current is above a predetermined threshold indicative of abnormal recharging. A controller is programmed to enable the charging circuitry to produce the shocks, and to disable the second battery whenever an abnormal recharging current is detected. The controller may operate to connect the batteries on anti parallel whenever an abnormal recharging current is detected.
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Citations
22 Claims
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1. An implantable cardiac rhythm management device, comprising:
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a pulse generator adaptively configured to generate electric shocks for delivery to a patient'"'"'s heart comprising;
at least one output capacitor;
charging circuitry capable of charging the at least one capacitor to produce high voltage shocks for delivery to the patient'"'"'s heart;
a first battery, switchably coupled to the charging circuitry, having the characteristic of a high current flow rate to fast charge the at least one capacitor;
a second battery, switchably connected in parallel to the first battery, having characteristics that enable the second battery to recharge the first battery;
a detector, coupled to the charging circuitry that detects when the recharging current is above a predetermined threshold indicative of abnormal recharging within the first battery; and
a controller programmed to switchably enable the charging circuitry to produce the high voltage shocks, and to disable the second battery whenever an abnormal recharging current is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable cardiac rhythm management device, comprising:
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capacitance means for providing a high voltage shock to a patient'"'"'s heart;
first power source means for fast charging the capacitance means using a high current flow rate;
second power source means for providing a slow recharge current to the first battery detection means for detecting when the recharging current is above a predetermined threshold indicative of abnormal recharging within the first power source means; and
control means for switchably coupling the capacitance means to the patient'"'"'s heart when fully charged, and to disable the second power source means whenever an abnormal recharging current is detected. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for recharging a high voltage shocking capacitor of an implantable cardiac rhythm management device, comprising the steps of:
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fast charging at least one high voltage shocking capacitor using a first battery having high current flow rate whenever a high voltage shock is needed;
switchably coupling the at least one capacitor to the patient'"'"'s heart when fully charged;
recharging the first battery;
detecting when the recharging current is above a predetermined threshold indicative of abnormal recharging within the first battery; and
in response to detecting when the recharging current is above a predetermined threshold, disabling the step of recharging. - View Dependent Claims (20, 21, 22)
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Specification