METHOD AND APPARATUS FOR SCORING THE RELIABILITY OF SHOCK ADVISORY DURING CARDIOPULMONARY RESUSCITATION

• US 20160015991A1
• Filed: 03/12/2014
• Published: 01/21/2016
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Babaeizadeh, Saeed, Firoozabadi, Reza
• Granted Patent: US 9,919,160 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/346 Analysis of electrocardiograms
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• CPC Class Codes: A61N 1/39044 in combination with cardiopulmonary resuscitation [CPR] therapy
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3993 User interfaces for automatic external defibrillators

Abstract

A method, system and device to detect and use clean ECG segments, which do not need filtering to remove artifact or CPR-induced noise, is described to provide a reliability score for the decision made by shock advisory algorithms. The method can be implemented in a system and/or device that is provided with a display for indicating to a user the relative quality of the determination of an electrotherapy analysis circuit.

Claims

1-8. -8. (canceled)

9. A medical device for determining the reliability of a cardiac rhythm analysis during the performance of cardiopulmonary resuscitation (CPR) comprising:

a front end operable to obtain two or more time-sequential ECG data sets comprised of a first ECG data set and a second ECG data set;

an input operable to acquire two or more time-sequential CPR reference signal data sets which correspond in time to the time-sequential ECG data sets;

a chest compression detector in communication with the input, operable to detect whether or not each of the ECG data sets contains CPR-related noise;

a shock advisory algorithm module in communication with the input and the chest compression detector and operable to analyze and classify each of the ECG data sets as a shock advice or a no-shock advice;

a reliability analyzer in communication with the chest compression detector and the shock advisory algorithm module operable to determine the reliability of the most recent ECG advice;

a shock decision generator in communication with the reliability analyzer and the shock advisory algorithm module operable to generate a shock decision; and

an output generator for issuing a user-perceptible indication of the shock decision and the reliability of the ECG shock advice.

10. The medical device of claim 9, wherein the medical device is a defibrillator.

11. The medical device of claim 9, wherein the input is selected from the group consisting of a thoracic impedance signal, an accelerometer, a force sensor, or a compressions status signal from an automated CPR machine.

13. The medical device of claim 9, wherein the shock advisory algorithm module is firth operable to analyze and classify each of the ECG data sets as artifact.

14. The medical device of claim 9, wherein the output generator comprises a display disposed in communication with the medical device operable to display an indication of the reliability of the ECG shock advice.

15. The medical device of claim 14, wherein the displayed indication of the reliability of the ECG shock advice comprises a graphical indicator.

16. The medical device of claim 14, wherein the displayed indication of the reliability of the ECG shock advice comprises a textual message.

21. The medical device of claim 9, wherein the reliability analyzer determines the reliability of the most recent ECG device based on a determined reliability of the previous ECG data set.

22. The medical device of claim 9,

wherein the shock advisory algorithm module analyzes and classifies each of the ECG data sets as a shock advice or a no-shock advice during a protocol CPR period in which the medical device is inoperable to deliver a defibrillation shock,

wherein the reliability analyzer determines the reliability of the most recent ECG advice during the protocol CPR period, and

wherein the shock decision generator generates a shock decision immediately after the end of the protocol CPR period.

23. The medical device of claim 9, wherein the shock decision generator is further operable to adjust a shock decision protocol based on a classification by the shock advisory algorithm module of each of the ECG data sets as a shock advice or a no-shock advice and further based on a determination by the reliability analyzer of the reliability of the most recent ECG advice.

24. The medical device of claim 9, wherein the shock decision generator adjusts the shock decision protocol by reducing a duration of a shock decision analysis period for generating the shock decision.

12. (canceled)

17. A defibrillator comprising:

a host circuit operable to analyze an ECG segment and determine whether an electrotherapeutic shock is necessary;

a reliability analyzing circuit operable to analyze the ECG segment and a prior ECG segment to determine a reliability of the shock determination decision; and

a display disposed on the defibrillator operable to display a reliability score based on the determined reliability.

18. The defibrillator of claim 17, wherein the displayed reliability score is a textual indication of whether or not the shock decision is reliable.

19. The defibrillator of claim 17, wherein the displayed reliability score is a graphical indicator disposed as a pointer graphic which points to one segment of a three-segment bar graphic, wherein one of the segments indicates a reliable no-shock decision, another one of the segments indicates an unreliable decision, and another one of the segments indicates a reliable shock decision.

20. The defibrillator of claim 19, wherein the three-segment bar graphic comprises one color for the unreliable segment and another color for the reliable segments.