Defibrillator with configurable capacitor arrangement
First Claim
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1. A defibrillator comprising:
- a pair of electrodes for coupling to a patient an HV switch coupled to said pair of electrodes;
a configurable energy storage capacitor network for delivering an impedance-compensated defibrillation pulse through said HV switch; and
a controller for obtaining a patient impedance and coupled to said energy storage capacitor network to select one of a plurality of configurations based on said patient impedance.
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Abstract
A defibrillator for delivering therapeutic electrical energy to a patient'"'"'s heart generally includes a power source, electrodes, a patient impedance sensor, and a controller. The electrode are capable of being applied to a patient and are operably coupled to the power source. The impedance sensor is couplable to the patient. The controller controls the power source and is communication with the patient impedance sensor. In response to the patient impedance and based thereon, the controller can configure a variety of circuit options to deliver a low current flow defibrillation waveform , which has a substantially constant tilt, to the patient.
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Citations
37 Claims
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1. A defibrillator comprising:
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a pair of electrodes for coupling to a patient an HV switch coupled to said pair of electrodes;
a configurable energy storage capacitor network for delivering an impedance-compensated defibrillation pulse through said HV switch; and
a controller for obtaining a patient impedance and coupled to said energy storage capacitor network to select one of a plurality of configurations based on said patient impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for delivering an impedance-compensated defibrillation pulse to a patient, comprising:
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measuring a patient impedance of said patient;
selecting from a set of configurations in an energy storage capacitor network to deliver an impedance-compensated defibrillation pulse to said patient responsive to said patient impedance; and
delivering said impedance-compensated defibrillation pulse to said patient. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A defibrillator comprising:
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a pair of electrodes for coupling to a patient;
a front end circuit coupled to said pair of electrodes to provide a patient impedance and an ECG signal;
an HV switch coupled to said pair of electrodes;
an energy storage capacitor network having a plurality of configurations; and
a controller coupled to said front end, to said HV switch, and to said energy storage capacitor network;
wherein said controller selects one of said configurations based on said patient impedance and a selected energy level and delivers an impedance-compensated defibrillation pulse through said HV switch to said patient responsive to detecting a shockable rhythm in said ECG signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for delivering an impedance-compensated defibrillation pulse to a patient, comprising:
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providing a pair of electrodes for coupling to said patient;
providing an HV switch coupled to said electrodes;
providing a plurality of sections coupled in parallel in an energy storage capacitor network coupled to said HV switch, each of said sections comprising a capacitor, a resistor, and a diode coupled in series;
charging each capacitor to a charge voltage in said rank order with said other sections; and
delivering an impedance matched defibrillation pulse through said HV switch and said pair of electrodes to said patient by sequentially discharging each of said sections. - View Dependent Claims (35, 36, 37)
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Specification