Short circuit fault-tolerance in an implantable medical device
First Claim
1. An implantable medical device comprising:
- an energy storage device configured to store electrical energy for delivery of a defibrillation therapy to a heart;
a plurality of electrodes;
a switching circuit configured to connect the plurality of electrodes to the energy storage device;
a memory storing a plurality of initial therapy configurations and transition data associated with each one of the plurality of initial therapy configurations, the transition data comprising a second therapy configuration and a third therapy configuration for each one of the plurality of initial therapy configurations, each of the plurality of initial therapy configurations and the associated second and third therapy configurations individually defining a set of the plurality of electrodes and a waveform for delivering the defibrillation therapy; and
a processing module configured to;
control the switching circuit to deliver the defibrillation therapy using a first one of the initial therapy configurations comprising a first set of the plurality of electrodes and using a biphasic waveform that includes first and second phases;
detect a short circuit fault during the biphasic waveform;
determine which one of the first phase and the second phase of the biphasic waveform the short circuit fault is detected in; and
responsive to detecting the short circuit fault during the first one of the initial therapy configurations, select one of the second therapy configuration and the third therapy configuration according to the transition data associated with the first one of the initial therapy configurations for delivery of a subsequent defibrillation therapy,the second therapy configuration being selected if the short circuit fault is detected during the first phase,the third therapy configuration being selected if the short circuit fault is detected during the second phase,the second therapy configuration being different than the first one of the initial therapy configurations and comprising a second set of the plurality of electrodes and one of a biphasic or monophasic waveform.
1 Assignment
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Accused Products
Abstract
A device includes an energy storage device, a plurality of electrodes, a memory, a switching circuit, and a processing module. The energy storage device stores electrical energy for delivery of defibrillation therapy to a heart. The memory stores N therapy configurations that define which of the plurality of electrodes are used to deliver defibrillation therapy and a waveform to be applied during delivery of defibrillation therapy. The switching circuit connects the plurality of electrodes to the energy storage device. The processing module controls the switching circuit to deliver defibrillation therapy according to a first therapy configuration of the N therapy configurations, detects a short circuit fault during delivery of the defibrillation therapy according to the first therapy configuration, and selects a second therapy configuration of the N therapy configurations based on when the short circuit fault was detected during delivery of the defibrillation therapy according to the first therapy configuration.
10 Citations
14 Claims
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1. An implantable medical device comprising:
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an energy storage device configured to store electrical energy for delivery of a defibrillation therapy to a heart; a plurality of electrodes; a switching circuit configured to connect the plurality of electrodes to the energy storage device; a memory storing a plurality of initial therapy configurations and transition data associated with each one of the plurality of initial therapy configurations, the transition data comprising a second therapy configuration and a third therapy configuration for each one of the plurality of initial therapy configurations, each of the plurality of initial therapy configurations and the associated second and third therapy configurations individually defining a set of the plurality of electrodes and a waveform for delivering the defibrillation therapy; and a processing module configured to; control the switching circuit to deliver the defibrillation therapy using a first one of the initial therapy configurations comprising a first set of the plurality of electrodes and using a biphasic waveform that includes first and second phases; detect a short circuit fault during the biphasic waveform; determine which one of the first phase and the second phase of the biphasic waveform the short circuit fault is detected in; and responsive to detecting the short circuit fault during the first one of the initial therapy configurations, select one of the second therapy configuration and the third therapy configuration according to the transition data associated with the first one of the initial therapy configurations for delivery of a subsequent defibrillation therapy, the second therapy configuration being selected if the short circuit fault is detected during the first phase, the third therapy configuration being selected if the short circuit fault is detected during the second phase, the second therapy configuration being different than the first one of the initial therapy configurations and comprising a second set of the plurality of electrodes and one of a biphasic or monophasic waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification