Consistency monitoring for ECG shock advisory decisions

• US 10,076,670 B2
• Filed: 12/24/2014
• Issued: 09/18/2018
• Est. Priority Date: 01/02/2014
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Firoozabadi, Reza, Babaeozadej, Saeed
• Primary Examiner(s): Gedeon, Brian T
• Application Number:
  US15/109,507
• Publication Number:
  US 20160331984A1
• Time in Patent Office: 1,364 Days
• Field of Search: None
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/332 Portable devices specially adapted therefor
• CPC Class Codes: A61B 5/346 Analysis of electrocardiograms
• CPC Class Codes: A61B 5/361 Detecting fibrillation
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3931 Protecting, e.g. back-up systems
• CPC Class Codes: A61N 1/3993 User interfaces for automatic external defibrillators

Abstract

A defibrillator or other patient monitoring device (20) employing an ECG monitor (23) and a controller (25). The ECG monitor (23) monitors an ECG waveform of a heart of a patient. The controller (25) segments the ECG waveform, and for each ECG waveform segment of a series of ECG waveform segments, generates an ECG shock advisory between a shock decision, a no-shock decision and an optional shock indecision. The controller (25) further monitors a consistency of the ECG shock advisories between consistent shock decisions, consistent no-shock decisions, and optional inconsistent shock decisions.

Claims

1. A defibrillator, comprising:

an ECG monitor configured for monitoring an ECG waveform of a heart of a patient; and

a defibrillation controller operably connected to the ECG monitor to segment the ECG waveform,

wherein, for each ECG waveform segment of a series of ECG waveform segments, the defibrillation controller generates an ECG shock advisory between a shock decision and a no-shock decision, and

wherein the defibrillation controller monitors a consistency of the ECG shock advisories between consistent shock decisions and consistent no-shock decisions.

2. The defibrillator of claim 1, wherein each ECG shock advisory is between the shock decision, the no-shock decision and a shock indecision.

3. The defibrillator of claim 2, wherein the consistency of the ECG shock advisories is between consistent shock decisions, consistent no-shock decisions and inconsistent shock decisions.

4. The defibrillator of claim 1, wherein, to monitor the consistency of the ECG shock advisories, the defibrillation controller calculates a consistency score of the ECG shock advisories.

5. The defibrillator of claim 4, wherein, to monitor the consistency of the ECG shock advisories, the defibrillation controller compares the consistency score to at least one of a consistent shock threshold and a consistent no-shock threshold.

6. The defibrillator of claim 5, wherein the defibrillation controller generates a consistency shock advisory responsive to the comparison of the consistency score to at least one of the consistent shock threshold and the consistent no-shock threshold.

7. The defibrillator of claim 6, wherein the defibrillation controller generates a defibrillation shock advisory as a logical combination of the consistency shock advisory and at least one ECG shock advisory.

8. The defibrillator of claim 5, wherein the defibrillation controller generates a consistency shock indication of the comparison of the consistency score to at least one of the consistent shock threshold and the consistent no-shock threshold.

9. The defibrillator of claim 1, wherein the defibrillator is at least one of an automatic external defibrillator or an advanced life support defibrillator.

10. The defibrillator of claim 1, wherein the defibrillator comprises at least one of an automatic external defibrillator, an advanced life support defibrillator or a patient monitor.

11. A defibrillation controller, comprising:

a shock advisor configured for segmenting an ECG waveform of a heart of a patient into a series of ECG waveform segments, wherein, for each ECG waveform segment of the series of ECG waveform segments, the shock advisor generates an ECG shock advisory between a shock decision and a no-shock decision; and

a consistency monitor operably connected to the shock advisor and configured to monitor a consistency of the ECG shock advisories between consistent shock decisions and consistent no-shock decisions.

12. The defibrillation controller of claim 11, wherein the ECG shock advisory is between a shock decision, a no-shock decision and a shock indecision.

13. The defibrillation controller of claim 11, wherein the consistency of the ECG shock advisories is between consistent shock decisions, consistent no-shock decisions and inconsistent shock decisions.

14. The defibrillation controller of claim 11, wherein, to monitor the consistency of the ECG shock advisories, the consistency monitor calculates a consistency score of the ECG shock advisories.

15. The defibrillation controller of claim 14, wherein, to monitor the consistency of the ECG shock advisories, the consistency monitor compares the consistency score to at least one of a consistent shock threshold and a consistent no-shock threshold.

16. The defibrillation controller of claim 15, wherein the consistency monitor generates a consistency shock advisory responsive to the comparison of the consistency score to at least one of the consistent shock threshold and the consistent no-shock threshold.

17. The defibrillation controller of claim 15, wherein the consistency monitor generates a consistency shock indication of the comparison of the consistency score to at least one of the consistent shock threshold and the consistent no-shock threshold.

18. A method for shock advisory, comprising:

segmenting an ECG waveform into a series of ECG waveform segments;

for each ECG waveform segment of the series of ECG waveform segments, generating an ECG shock advisory between a shock decision and a no-shock decision; and

monitoring a consistency of the ECG shock advisories between consistent shock decisions and consistent no-shock decisions.

19. The method of claim 18,

wherein the ECG shock advisory is between a shock decision, a no-shock decision and an shock indecision;

and

wherein the consistency of the ECG shock advisories is between consistent shock decisions, consistent no-shock decisions and inconsistent shock decisions.

20. The method of claim 18,

wherein monitoring the consistency of the ECG shock advisories includes

calculating a consistency score of the ECG shock advisories, and

comparing the consistency score to at least one of a consistent shock threshold or a consistent no-shock threshold;

and

wherein the method further comprises at least one of;

(i) generating a consistency shock advisory responsive to the comparison of the consistency score to at least one of the consistent shock threshold or the consistent no-shock threshold;

or

(ii) generating a consistency shock indication of the comparison of the consistency score to at least one of the consistent shock threshold or the consistent no-shock threshold.