Implantable cardioverter defibrillator with programmable capacitor charging level
First Claim
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1. A cardiac rhythm management (CRM) system, comprising:
- an implantable cardioverter defibrillator (ICD) including;
a defibrillation circuit to deliver defibrillation shock pulses each having an amount of energy programmed to a shock pulse energy level, the defibrillation circuit providing for a programmable ICD energy level being a maximum energy level up to which the shock pulse energy level is programmable; and
an energy level control module coupled to the defibrillation circuit, the energy level control module adapted to control the ICD energy level using one or more programming parameters, wherein the ICD has an energy efficiency that is increased by decreasing a difference between the ICD energy level and the shock pulse energy level; and
an external system communicatively coupled to the ICD, the external system including;
a user interface including;
a user input device adapted to receive an energy level parameter specifying the ICD energy level; and
a presentation device adapted to visually present one or more estimated ICD performance parameters each being a function of the ICD energy level;
an ICD energy level programming module coupled to the user interface, the ICD energy level programming module adapted to produce the one or more programming parameters using the received energy level parameter; and
an ICD performance estimation module coupled to the user interface, the ICD performance estimation module adapted to produce the one or more estimated ICD performance parameters using the received energy level parameter.
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Abstract
An implantable cardioverter defibrillator (ICD) has a programmable ICD energy level corresponding to the maximum defibrillation energy deliverable with each defibrillation shock pulse. The ICD energy level is programmable within the maximum energy capacity of the defibrillation capacitor(s) of the ICD. In various embodiments, after a user enters the ICD energy level, one or more corresponding ICD performance parameters are presented. Restrictions are applied to the energy level programming of the ICD to ensure the predictability of the one or more ICD performance parameters.
28 Citations
34 Claims
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1. A cardiac rhythm management (CRM) system, comprising:
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an implantable cardioverter defibrillator (ICD) including; a defibrillation circuit to deliver defibrillation shock pulses each having an amount of energy programmed to a shock pulse energy level, the defibrillation circuit providing for a programmable ICD energy level being a maximum energy level up to which the shock pulse energy level is programmable; and an energy level control module coupled to the defibrillation circuit, the energy level control module adapted to control the ICD energy level using one or more programming parameters, wherein the ICD has an energy efficiency that is increased by decreasing a difference between the ICD energy level and the shock pulse energy level; and an external system communicatively coupled to the ICD, the external system including; a user interface including; a user input device adapted to receive an energy level parameter specifying the ICD energy level; and a presentation device adapted to visually present one or more estimated ICD performance parameters each being a function of the ICD energy level; an ICD energy level programming module coupled to the user interface, the ICD energy level programming module adapted to produce the one or more programming parameters using the received energy level parameter; and an ICD performance estimation module coupled to the user interface, the ICD performance estimation module adapted to produce the one or more estimated ICD performance parameters using the received energy level parameter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An implantable cardioverter defibrillator (ICD), comprising:
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a defibrillation circuit to deliver defibrillation shock pulses each having an amount of energy programmed to a shock pulse energy level, the defibrillation circuit including; a defibrillation capacitor to store an energy for each of the defibrillation shock pulses; and a capacitor charging circuit to charge the defibrillation capacitor to a maximum charging level in preparation for the delivery of each of the defibrillation shock pulses; and an implant controller coupled to the defibrillation circuit, the implant controller including; a parameter receiver to receive an ICD energy level parameter specifying a programmable ICD energy level controlling the maximum charging level and being a maximum value up to which the shock pulse energy level is programmable; an operational parameter producer coupled to the parameter receiver and adapted to produce one or more ICD operational parameters including a maximum charging level and a reform charging level using the ICD energy level parameter; and an energy level control module coupled to the operational parameter producer and adapted to control the ICD energy level, the energy level control module including; a maximum charging level controller to control the maximum charging level of the defibrillation capacitor; and a reform charging level controller to control the reform charging level of the defibrillation capacitor. - View Dependent Claims (8, 9, 10)
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11. An external system for communicating with an implantable cardioverter defibrillator (ICD), the external system comprising:
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a user interface including; a user input device adapted to receive an energy level parameter specifying an ICD energy level; and a presentation device to visually present one or more estimated ICD performance parameters each being a function of the ICD energy level; an ICD energy level programming module coupled to the user interface and adapted to program the ICD with the ICD energy level, the ICD energy level being a programmable maximum value up to which a shock pulse energy level is programmable, the shock pulse energy level being an amount of defibrillation energy programmed for each defibrillation shock pulse delivered from the ICD; an ICD performance estimation module coupled to the user interface and adapted to produce the one or more estimated ICD performance parameters using the received energy level parameter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for operating an implantable cardioverter defibrillator (ICD), the method comprising:
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receiving an energy level parameter specifying an ICD energy level from a user using an external system communicatively coupled to the ICD; producing one or more programming parameters using the received energy level parameter, the one or more programming parameters each being a function of the ICD energy level; producing one or more estimated ICD performance parameters using the received energy level parameter; visually presenting the one or more estimated ICD performance parameters using the external system; transmitting the one or more programming parameters from the external system to the ICD; controlling the ICD energy level by the ICD using the received one or more programming parameters, the ICD energy level being a maximum defibrillation energy level up to which a shock pulse energy level is programmable, the shock pulse energy level being an amount of defibrillation energy delivered with each of defibrillation shock pulses from the ICD; and programming the ICD with the shock pulse energy level. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification