Event reconstruction for a medical device

Patent metadata

Field	Value
Publication number	US-11508474-B2
Application number	US-201715472908-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Mar 31, 2016
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

A device for graphically reconstructing information received from a medical device is provided. The device comprises an event processor configured to process information received from a medical device by receiving electrocardiogram (ECG) recordings and determining at least one cardiac event based on the ECG recordings, receiving data corresponding to non-cardiac event(s), determining a time of occurrence or a time period associated with the cardiac event(s), determining times of occurrences and time periods associated with the non-cardiac event(s), correlating the time of occurrence or time period associated with the cardiac event(s) and the non-cardiac event(s), identifying one or more gaps in the ECG recordings, and reconstructing the ECG recordings during the one or more gaps based at least in part on the received non-cardiac data. The event processor is also configured to generate a graphical representation of the processed information based on the cardiac event(s) and non-cardiac event(s).

First claim

What is claimed is:

1. A system for providing a graphical representation of information comprising:
a wearable defibrillator comprising:
a garment configured to be worn on a torso of a patient;
a shock generator supported by the garment and configured to generate an electrical therapeutic shock;
one or more therapy electrodes configured to provide the shock from the shock generator to the patient;
one or more ECG sensors configured to detect an ECG signal of the patient;
one or more motion sensors configured to detect one or more motion signals, the one or more motion sensors comprising a single axis accelerometer, a multi-axis accelerometer, or a gyroscope;
a memory in communication with the sensors, the memory configured to store the detected ECG and motion signals of the patient;
at least one defibrillator processor in communication with the shock generator, electrodes, sensors and memory, configured to:
cause the shock generator to provide the electrical therapeutic shock to the patient in response to certain detected cardiac events;
process the ECG signals from the one or more ECG sensors to detect cardiac events in the ECG signals;
wirelessly transmit a plurality of ECG recordings generated from the ECG signals for time intervals including the cardiac events; and
wirelessly transmit motion data generated from the one or more motion signals for the time intervals including the cardiac events and for time intervals without cardiac events;

at least one processor remote from and in wireless communication with the wearable defibrillator configured to process information received from the wearable defibrillator; and
a user interface device operably connected to the at least one processor, wherein the at least one processor is configured to:
receive the plurality of ECG recordings for the time intervals including the cardiac events,
identify time periods between the plurality of ECG recordings for which ECG recordings are not available,
process the motion data for the time intervals including the cardiac events and for the time periods between the plurality of ECG recordings to identify one or more motion events occurring during the time intervals including the cardiac events and during the time periods between the plurality of ECG recordings, wherein the motion events are related to at least one of movement or physical activity of the patient identified based on the motion data generated by the one or more motion sensors,
determine at least one of times of occurrences and time periods associated with the cardiac events,
determine at least one of times of occurrences and time periods associated with the one or more motion events, and
generate, for display on the user interface device, a graphical representation of the processed information for the identified events, the graphical representation comprising:
a time-dependent ECG waveform generated from the plurality of ECG recordings;
at least one non-ECG motion graphical event indicator for the identified one or more motion events occurring during time periods between the plurality of ECG recordings, the at least one non-ECG motion graphical event indicator indicating (i) the time of occurrence for the motion event and (ii) that the identified one or more motion events occurred during one of the time periods between the plurality of ECG recordings;
at least one ECG motion graphical event indicator for the identified one or more motion events occurring during the time intervals including the cardiac events, the at least one ECG motion graphical event indicator indicating (i) the time of occurrence for the identified one or more motion events and (ii) that the identified one or more motion events occurred during the time intervals including the cardiac events; and
at least one visual indication generated based on the motion data, the at least one visual indication indicating at least one of (i) a body position of the patient during a selected discrete time or (ii) a type of physical activity being performed by the patient during the selected discrete time; and

causing the user interface device to display the graphical representation.

2. The system of claim 1 , wherein the cardiac events comprise one or more of: a patient-initiated event, a remotely triggered event, a device-initiated event, and a cardiac arrhythmia event, and wherein the graphical representation comprises an indication of event type.

3. The system of claim 1 , wherein the cardiac events comprise a false alarm to the patient and the graphical representation provides a reviewer with an ability to determine a potential cause of the false alarm, and wherein the at least one motion graphical event indicator provides the reviewer with an ability to review information about the one or more motion events with respect to the at least one of the time of occurrence and the time period associated with the false alarm to determine the potential cause of the false alarm.

4. The system of claim 1 , wherein the graphical representation provides a reviewer with an ability to review information about one or more of a system, subsystem, and a component of the wearable defibrillator during analysis of the cardiac events.

5. The system of claim 4 , wherein the information about the one or more of the system, subsystem, and the component of the wearable defibrillator includes battery information, electrode status information, and controller status information.

6. The system of claim 1 , wherein the one or more motion events further comprise one or more of a physiological event, a device-initiated event, and an event related to a patient location.

7. The system of claim 6 , wherein the at least one non-ECG motion graphical event indicator and/or the at least one ECG motion graphical event indicator for the identified one or more motion events further comprises an indication representative of a device-initiated event comprising one or more of: a number of device faults over the time intervals, a time and duration of device faults over the time intervals, an amount of time since the most recent fault, a device battery level, a number of electrode fall off events over the time intervals, pulse voltage information, pulse current information, a number of abnormal device shutdowns over the time intervals, diagnostic test results, and/or electrode noise information.

8. The system of claim 7 , wherein the at least one non-ECG motion graphical event indicator and/or the at least one ECG motion graphical event indicator comprises an icon, and wherein at least a portion of the icon has a first appearance when there are no faults over the time intervals and at least a portion of the icon has a second appearance when there are one or more faults over the time intervals.

9. The system of claim 1 , wherein the at least one non-ECG motion graphical event indicator and/or the at least one ECG motion graphical event indicator for the identified one or more motion events further comprises information relating to one or more of: patient body position, patient body angle, time performing the physical activity, movement speed, and/or movement rate.

10. The system of claim 1 , wherein the at least one visual indication comprises a visual indicator that the patient is laying down, sitting, standing, walking, or running.

11. The system of claim 1 , wherein the graphical representation of the information further comprises at least one overall metric calculated from the received ECG recordings and motion data from the wearable defibrillator, the overall metric comprising one or more of: a number of treatments administered by the wearable defibrillator over the time intervals, an amount of time with normal cardi

Assignees

• Zoll Medical Corp

Inventors

• Hresko Patrick
• Brenner Marc C

Classifications

• G16H40/60 Primary

  for the operation of medical equipment or devices · CPC title

• G16H10/20

  for electronic clinical trials or questionnaires · CPC title

• G16H20/30

  relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising · CPC title

• G16H15/00

  ICT specially adapted for medical reports, e.g. generation or transmission thereof · CPC title