Automated external defibrillator with shortened pause for rhythm analysis
AssigneeKoninklijke Philips N.V.
InventorsChenguang Liu, Eric Grant Halsne, Stacy Earl Gehman, Dawn Blilie Jorgenson, Vijay Aditya Tadipatri
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Abstract
An automated external defibrillator (AED) is described which includes two electrocardiogram (ECG) analyzers. One of the ECG analyzers is suitable for use only for ECG which is signal-noise-free, and thus may be used during “hands-off” analysis periods in which no cardiopulmonary resuscitation (CPR) compressions can be provided. The length of the “hands-off” analysis period can be shortened by use of the second ECG analyzer in concert with the first ECG analyzer. Thus, a greater proportion of CPR time through the course of a cardiac arrest rescue is achieved.
Claims14
An automated external defibrillator (AED) for use during cardiopulmonary resuscitation (CPR) comprising:
- an input of an ECG signal of a patient's heart from two or more electrodes in electrical contact with the patient;
- a user interface having at least one of an aural instruction output and a visual display;
- a first ECG analyzer capable of receiving ECG signal data streams from the input and operable to determine, during a hands-off CPR period characterized by no presence of CPR-related signal noise artifact from the input, a shockable cardiac rhythm;
- a second ECG analyzer capable of receiving ECG signal data streams from the input and operable to determine, during a CPR compression period or a CPR hands-off period characterized by a presence of CPR-related signal noise artifact from the input, a shockable cardiac rhythm;
- a processor in communication with the user interface, the first ECG analyzer and the second ECG analyzer, the processor operable to execute software instructions to reduce a duration of the hands-off period only if both of the first and second ECG analyzers determine that a shockable cardiac rhythm is not present,
- wherein the processor is further operable to execute software instructions to issue a user prompt to end the hands-off period and to resume CPR at the end of the reduced-duration hands-off period.
A method for controlling a defibrillator during the application of cardiopulmonary resuscitation (CPR), comprising the steps of:
- providing a defibrillator having a first ECG analyzer operable to determine, during a hands-off CPR period characterized by no presence of CPR-related signal noise artifact, a shockable cardiac rhythm, and a second ECG analyzer operable to determine, during a CPR compression period or a CPR hands-off period, in the presence of CPR-related signal noise artifact, a shockable cardiac rhythm;
- receiving an ECG signal data stream from two or more external electrodes in electrical contact with a patient and in communication with the first and second ECG analyzers, the ECG signal data comprising a cardiac signal;
- prompting with one of an audible or visual output instructions for providing successive periods of CPR wherein the ECG signal is characterized by corruption from a CPR compressions noise artifact and hands-off periods wherein the ECG signal is characterized by a lack of CPR compressions noise artifact;
- analyzing the cardiac signal with the first ECG analyzer during at least one CPR hands-off period characterized by a duration;
- analyzing the cardiac signal with the second ECG analyzer;
- reducing the duration of the hands-off period to a reduced-duration hands-off period only if both of the first and second ECG analyzers determine that a shockable cardiac rhythm is not present;
- and
- issuing with one of the audible or visual output, instructions for ending the hands-off period and for resuming CPR at the end of the reduced-duration hands-off period.
Dependencies are inferred from the claim text.