Techniques for identifying and analyzing events-of-interest indicated by physiological parameters
Inventors
Chapman, Fred W. • Walker, Robert G.
Assignees
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Publication Number
US-12446818-B2
Publication Date
2025-10-21
Expiration Date
Abstract
Various techniques related to post-treatment parameters of patients are described. An example method includes identifying a segment of an electrocardiogram (ECG) of an individual, wherein the segment is detected during a time interval that begins when an electrical shock is output to the individual's heart. The method further includes identifying a parameter of the electrical shock and generating a report including the segment of the ECG and indicating the parameter of the electrical shock. The report is output or transmitted to an external device.
Core Innovation
The invention provides a monitor-defibrillator and related medical device that detect an electrocardiogram (ECG) and use ECG segmentation to evaluate the effect of electrical shocks. It identifies a pre-shock segment of the ECG before a first time and determines whether the pre-shock segment is indicative of a shockable arrhythmia comprising ventricular fibrillation (VF) or ventricular tachycardia (VT). Based on that determination, it outputs the first electrical shock to the individual.
After the first electrical shock, the processor identifies a post-shock segment of the ECG that begins within a threshold time period of the first electrical shock being administered and determines whether the post-shock segment is indicative of the shockable arrhythmia temporarily resolving. In response to determining temporary resolution, the discharge circuit outputs a second electrical shock at the same vector as the first electrical shock.
For a non-shockable heart rhythm scenario, the invention identifies a post-shock segment that begins within a threshold time period of a first electrical shock being administered and determines that the post-shock segment is indicative of a non-shockable heart rhythm. It then identifies a pre-shock segment detected after the post-shock segment and before a second electrical shock, and determines that the pre-shock segment is indicative of the shockable arrhythmia (VF or VT). In response to these determinations, the device outputs a report indicating that the arrhythmia has temporarily resolved or outputs a recommendation to administer the second electrical shock at a same shock parameter as the first electrical shock.
The invention further extends shock-related event recognition and report generation by using time-aligned segments and post-shock responses to decide whether to maintain versus modify subsequent defibrillation treatment parameters and/or give instructions. It also documents reports that summarize shock times and shock parameters and includes report formats with vertically aligned ECG segments for multiple shocks, while handling different outcomes such as temporary resolution versus failure to resolve.
Claims Coverage
The document provides three independent claims. Across these claims, the inventive focus is on ECG segmentation into pre-shock and post-shock segments, using those segments to classify shockable VF/VT and non-shockable heart rhythm outcomes, and using those determinations to output a report and/or control a second electrical shock with specified vector or shock-parameter relationships.
Monitor-defibrillator with pre-shock ECG indication and same-vector second shock
A monitor-defibrillator configured to detect an ECG, output a first and a second electrical shock at first and second times, identify a pre-shock segment indicative of a shockable arrhythmia comprising VF or VT, and then identify a post-shock segment beginning within ten seconds of the first time that is indicative of the shockable arrhythmia temporarily resolving, wherein in response the discharge circuit outputs the second electrical shock at the same vector as the first electrical shock.
Medical device with post-shock non-shockable rhythm and resolution report or same-parameter recommendation
A medical device comprising a detection circuit configured to detect an ECG and a processor configured to identify a post-shock segment beginning within a threshold time period of a first electrical shock being administered and determine that the post-shock segment is indicative of a non-shockable heart rhythm, identify a pre-shock segment detected after the post-shock segment and before a second electrical shock being administered and determine it is indicative of a shockable arrhythmia comprising VF or VT, and in response output a report indicating that the arrhythmia has temporarily resolved or output a recommendation to administer the second electrical shock at a same shock parameter as the first electrical shock.
Method identifying post-shock non-shockable rhythm and outputting resolution or same-parameter recommendation
A method comprising identifying a post-shock segment of an ECG beginning within a threshold time period of a first electrical shock being administered and determining it is indicative of a non-shockable heart rhythm, identifying a pre-shock segment detected after the post-shock segment and before a second electrical shock and determining it is indicative of a shockable arrhythmia comprising VF or VT, and in response outputting a report indicating that the arrhythmia has temporarily resolved or outputting a recommendation to administer the second electrical shock at a same shock parameter as the first electrical shock.
Overall, the claims cover ECG-based identification of shockable versus non-shockable rhythm using pre-shock and post-shock segments, and they connect those determinations to either producing a report/recommendation about temporary resolution and/or controlling a second electrical shock using specified relationships (same vector and/or same shock parameter).
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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