CPR sensitive ECG analysis in an automatic external defibrillator
First Claim
1. A method for automatically delivering defibrillation shocks to a patient, comprisingapplying electrodes to the chest of the patient for delivering a defibrillation shock to the patient and for detecting an ECG signal;
- using a sensor to detect when a rescuer is delivering a CPR chest compression to the patient;
analyzing the ECG signal to determine if the cardiac rhythm is shockable (treatable by defibrillation therapy);
analyzing the output of the sensor to determine when a CPR chest compression has been delivered, and integrating the ECG analysis and CPR detection so that the determination of whether the cardiac rhythm is shockable is based only on time periods of the ECG signal during which there has not been a CPR chest compression delivered. wherein the ECG analysis includes analysis of the ECG signal over a minimum ECG analysis time to determine whether the cardiac rhythm is shockable, and wherein integration of the ECG analysis and CPR detection is done so that a determination that the cardiac rhythm is shockable is only made if the time period over which the ECG signal has been analyzed to make that determination includes a time period at least as long as the minimum ECG analysis time during which there has not been a CPR chest compression delivered.
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Accused Products
Abstract
An automatic external defibrillator including: a sensor for detecting when a rescuer is delivering a CPR chest compression to the patient; electrodes for application to the thorax of the patient for delivering a defibrillation shock to the patient and for detecting an ECG signal; defibrillation circuitry for delivering a defibrillation shock to the electrodes; and a processor and associated memory for executing software that controls operation of the defibrillator. The software provides: ECG analysis for analyzing the ECG signal to determine if the cardiac rhythm is shockable; CPR detection for analyzing the output of the sensor to determine when a CPR chest compression has been delivered, and integration of the ECG analysis and CPR detection so that the determination of whether the cardiac rhythm is shockable is based only on time periods of the ECG signal during which there has not been a CPR chest compression delivered.
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Citations
12 Claims
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1. A method for automatically delivering defibrillation shocks to a patient, comprising
applying electrodes to the chest of the patient for delivering a defibrillation shock to the patient and for detecting an ECG signal; -
using a sensor to detect when a rescuer is delivering a CPR chest compression to the patient;
analyzing the ECG signal to determine if the cardiac rhythm is shockable (treatable by defibrillation therapy);
analyzing the output of the sensor to determine when a CPR chest compression has been delivered, and integrating the ECG analysis and CPR detection so that the determination of whether the cardiac rhythm is shockable is based only on time periods of the ECG signal during which there has not been a CPR chest compression delivered. wherein the ECG analysis includes analysis of the ECG signal over a minimum ECG analysis time to determine whether the cardiac rhythm is shockable, and wherein integration of the ECG analysis and CPR detection is done so that a determination that the cardiac rhythm is shockable is only made if the time period over which the ECG signal has been analyzed to make that determination includes a time period at least as long as the minimum ECG analysis time during which there has not been a CPR chest compression delivered. - View Dependent Claims (2, 3, 4)
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5. An automatic external defibrillator for delivering defibrillation shocks to a patient, comprising
a sensor for detecting when a rescuer is delivering a CPR chest compression to the patient: -
electrodes for application to the thorax of the patient for delivering a defibrillation shock to the patient and for detecting an ECG signal;
defibrillation circuitry for delivering a defibrillation shock to the electrodes;
a processor and associated memory for executing software that controls operation of the defibrillator, the software providing ECG analysis for analyzing the ECG signal to determine if the cardiac rhythm is shockable (treatable by defibrillation therapy);
CPR detection for analyzing the output of the sensor to determine when a CPR chest compression has been delivered, and integration of the ECG analysis and CPR detection so that the determination of whether the cardiac rhythm is shockable is based only on time periods of the ECG signal during which there has not been a CPR chest compression delivered, wherein the ECG analysis comprises analysis of the ECG signal over a minimum ECG analysis time to determine whether the cardiac rhythm is shockable, and wherein integration of the ECG analysis and CPR detection is done so that a determination that the cardiac rhythm is shockable is only made if the time period over which the ECG signal has been analyzed to make that determination includes a time period at least as long as the minimum ECG analysis time during which there has not been a CPR chest compression delivered. - View Dependent Claims (6, 7, 8)
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9. An automatic external defibrillator for delivering defibrillation shocks to a patient, comprising
a sensor for detecting when a rescuer is delivering a CPR chest compression to the patient; -
electrodes for application to the chest of the patient for delivering a defibrillation shock to the patient and for detecting an ECG signal;
defibrillation circuitry for delivering a defibrillation shock to the electrodes;
ECG analysis means for analyzing the ECG signal to determine if the cardiac rhythm is shockable (treatable by defibrillation therapy);
CPR detection means for analyzing the output of the sensor to determine when a CPR chest compression has been delivered, and integration means for integrating the ECG analysis and CPR detection so that the determination of whether the cardiac rhythm is shockable is based only on time periods of the ECG signal during which there has not been a CPR chest compression delivered, wherein the ECG analysis includes analysis of the ECG signal over a minimum ECG analysis time to determine whether the cardiac rhythm is shockable, and wherein integration of the ECG analysis and CPR detection is done so that a determination that the cardiac rhythm is shockable is only made if the time period over which the ECG signal has been analyzed to make that determination includes a time period at least as long as the minimum ECG analysis time during which there has not been a CPR chest compression delivered. - View Dependent Claims (10, 11, 12)
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Specification